TW201526419A - Surge protection circuit applied in connector - Google Patents

Abstract

The present invention relates to a surge protection circuit applied in a connector with 10 Gbit/s data transition rate, wherein the surge protection circuit comprises a plurality of surge protection devices disposed between an isolation transformer module and a motherboard having network physical layers, and the surge protection devices are also disposed between the isolation transformer module and the ground. Therefore, when a high-voltage surge is produced in the connector, the surge protection devices would absorb and block the high level voltage or current produced by the high-voltage surge, so as to prevent the network physical layers or the motherboard from being burned by the high level voltage or current, and then the absorbed high level voltage or current would be released via the ground.

Description

Anti-surge protection circuit for connectors

The invention relates to an anti-surge protection circuit, in particular to an anti-surge protection circuit for a 10 Gbit/s transmission rate of a connector.

In order to facilitate data storage and data exchange among notebook computers, smart phones and tablets, computer operators are equipped with USB electrical connectors in notebook computers, smart phones and tablets, and communication systems. The industry partnered to launch the Cloud Drive service. Therefore, in order to respond to various cloud hard disk services, the communication system operator must increase the number of network servers on the server side or the relay side, thereby increasing the data transmission traffic. Among them, the RJ45 electrical connector is usually installed in the network server to serve as a connection interface between the network server and the Ethernet twisted pair network route.

Please refer to the first figure, which is a conventional RJ45 electrical connector module. As shown in the first figure, a plurality of RJ45 electrical connectors 10' are integrated into a single RJ45 electrical connector module 1', so that the RJ45 electrical connector module 1' can be installed into the network in a modular manner. The server, in this way, simplifies the architecture of the network server and at the same time increases its scalability. In addition, with these RJ45 The number of electrical connectors 10', the RJ45 electrical connector module 1' is typically provided with a plurality of isolation transformers for performing signal transmission, waveform repair, and high voltage isolation.

Please refer to the second figure, which is the equivalent circuit diagram of the isolation transformer inside the RJ45 electrical connector module. As shown in the second figure, the first isolation transformer 11' inside the RJ45 electrical connector module 1' is coupled to a signal input interface 111' of the RJ45 electrical connector module, that is, The RJ45 electrical connector 10'; oppositely, the secondary side of the first isolation transformer 11' is coupled to a signal receiving interface 112', that is, a network electrically connected to the RJ45 electrical connector module 1' Physical Layer. Similarly, the primary side of the second isolation transformer 12', the third isolation transformer 13' and the fourth isolation transformer 14' are also coupled to the signal input interface 111', and the secondary side is coupled to the signal receiving interface 112'. .

Referring to the second figure, the first isolation transformer 11', the second isolation transformer 12', the third isolation transformer 13', and the center-tapped (CT) system of the primary side of the fourth isolation transformer 14' A first resistor (Is1), a second resistor Im2', a third resistor Im3', and a fourth resistor Im4' are coupled to the first resistor Im1', the second resistor Im2', and the third resistor Im3. The resistance of the fourth resistor Im4' is 75 ohms; thus, by the arrangement of these resistors, the isolation transformers can achieve impedance matching with the input signal (interface). In addition, the resistors are further coupled with a high voltage capacitor CHV' having a capacitance of 1000 pF for a sudden high The voltage input is coupled to ground (Ground).

Moreover, as shown in the side view of the package component of the transformer shown in FIG. 3, the aforementioned isolation transformers can be soldered onto a substrate 16' and then covered with an epoxy cover. In this way, the isolation transformer and the impedance element are made into a transformer electronic component 15', and the RJ45 electrical connector module 1' is further miniaturized by the arrangement of the integrated transformer electronic component 15'. Wherein, after the integration of the isolation transformer and the impedance component is completed, the primary isolation transformer 11', the second isolation transformer 12', the third isolation transformer 13', and the primary isolation coupling of the fourth isolation transformer 14' Connected to an input terminal group 151', and its secondary side is coupled to an output terminal group 152'.

At present, the equivalent circuit of the isolation transformer inside the RJ45 electrical connector module 1' shown in the second figure and the integrated transformer component 15' shown in the third figure are widely used in various networks. An electrical connector or an electrical connector module; however, the equivalent circuit of the isolation transformer and the transformer component 15' are only equipped with a high voltage capacitor CHV' to couple a sudden high voltage input to the ground; The situation often encountered in the practical area is that in order to facilitate the consideration of network wiring, the network cable is often barely placed outside the building; therefore, in the event of a lightning strike, the high voltage current generated by the lightning strike That is, it may be instantaneously transmitted to a data machine or a computer connected to the network cable, thereby causing the data machine or the computer motherboard to be burnt due to high voltage current. That is, the equivalent circuit of the aforementioned isolation transformer Further, the transformer element 15' is not provided with an anti-surge protection circuit or an electronic component, and the equivalent circuit of the above-described isolation transformer and the transformer element 15' do not have a function of preventing surge.

Therefore, in view of the fact that the equivalent circuit of the conventional isolation transformer or the integrated component of the isolation transformer does not have the function of preventing the surge, the inventors of the present invention tried to study the invention and finally developed a method for connecting the present invention. The anti-surge protection circuit of the device.

A first object of the present invention is to provide a 10 Gbit/s transmission rate anti-surge protection circuit for a connector, which is an isolation transformer module (filter module) and a motherboard having a network physical layer. A plurality of anti-surge protection components are disposed between the plurality of anti-surge protection components, and a plurality of anti-surge protection components are disposed between the isolation transformer module and the ground; and the setting is used to generate a high-voltage surge The anti-surge protection components absorb and block the high voltage or high current generated by the high voltage surge to prevent high voltage or high current from burning the physical layer of the network or the motherboard having the physical layer of the network.

A second object of the present invention is to provide a 10Gbit/s transmission rate anti-surge protection circuit for a connector, wherein each circuit unit and electronic component of the anti-surge protection circuit can be integrated into one circuit board at the same time. And; through an input terminal set provided on the circuit board An output terminal group, wherein the isolation transformer module (filter module) of the anti-surge protection circuit can be respectively coupled to the signal receiving interface and the network physical layer on the motherboard through the input terminal group and the output terminal group; Further, the anti-surge protection circuit can be packaged into a package electronic component by an epoxy resin cover, thereby completing the integration of the anti-surge protection circuit for the connector of the present invention, and further expanding Increase the application of the anti-surge protection circuit for the connector.

Therefore, in order to achieve the above object of the present invention, the inventor of the present invention proposes an anti-surge protection circuit for a connector, comprising: a filter module, one end of which is coupled to a signal receiving interface, and the other end thereof The first protection element group is connected between the filter module and the signal receiving interface, wherein the first protection is generated when a high voltage surge is generated. The component group absorbs and blocks the high voltage or high current generated by the high voltage surge to prevent high voltage or high current from burning the physical layer of the network or having one of the physical layers of the network; a second protection component a group connected between the filter module and a ground line for coupling a sudden high voltage input to the ground line; and a third protection element group connected in parallel to the second protection element group, Wherein, when the high voltage surge is generated, the third protection element group simultaneously absorbs and blocks the high voltage or high current generated by the high voltage surge, and further absorbs the ground through the ground line. Receive high voltage or high current freed.

<present invention>

1‧‧‧Anti-surge protection circuit for connectors

11‧‧‧Filter module

12‧‧‧First Protection Element Group

13‧‧‧Second protection component group

14‧‧‧ Third protection component group

101‧‧‧Signal receiving interface

102‧‧‧Network physical layer

111a‧‧‧First Common Mode Filter Coil

112a‧‧‧Second common mode filter coil

113a‧‧‧ Third common mode filter coil

114a‧‧‧Fourth Common Mode Filter Coil

121‧‧‧First transient voltage suppressor

122‧‧‧Second transient voltage suppressor

123‧‧‧ Third transient voltage suppressor

124‧‧‧4th transient voltage suppressor

GND‧‧‧ ground wire

C _HV ‧‧‧ high voltage capacitor

Im1‧‧‧First resistance

C _CM ‧‧‧Common Mode Filter Capacitor

2‧‧‧ boards

21‧‧‧Input terminal group

22‧‧‧Output terminal set

T _GND ‧‧‧Ground terminal

20‧‧‧Epoxy Resin Cover

115a‧‧‧Nth common mode filter coil

125‧‧‧Nth transient voltage suppressor

141‧‧‧First protection element

142‧‧‧Second protective element

Im2‧‧‧second resistance

<知知>

1'‧‧‧RJ45 electrical connector module

10'‧‧‧RJ45 electrical connector

11’‧‧‧First Isolation Transformer

111’‧‧‧Signal input interface

122'‧‧‧Signal receiving interface

12’‧‧‧Second isolation transformer

13’‧‧‧The third isolation transformer

Im1’‧‧‧First resistance

Im2’‧‧‧second resistance

Im3’‧‧‧ third resistor

Im4’‧‧‧fourth resistor

C _HV '‧‧‧High Voltage Capacitor

16'‧‧‧Substrate

15'‧‧‧Transformer electronic components

151'‧‧‧Input terminal set

152'‧‧‧Output terminal set

The first figure is a conventional RJ45 electrical connector module; the second figure is the equivalent circuit diagram of the isolation transformer inside the conventional RJ45 electrical connector module; the third figure is a side sectional view of the package component of a transformer; Figure 5, FIG. 5 and FIG. 6 are circuit diagrams of an anti-surge protection circuit for a connector of the present invention; and seventh diagram is a package electronic component of the anti-surge protection circuit for a connector of the present invention. The exploded view; and the eighth diagram is a circuit diagram of a second embodiment of the anti-surge protection circuit for a connector of the present invention.

In order to more clearly describe the anti-surge protection circuit for a connector proposed by the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the drawings. Please refer to the fourth and fifth figures at the same time, which is a circuit diagram of the anti-surge protection circuit for the connector of the present invention. As shown in the figure, the invention is used The anti-surge protection circuit 1 of the connector includes: a filter module 11, a first protection component group 12, a second protection component group 13, and a third protection component group 14, wherein the filter module The two ends of the 11 are respectively coupled to a signal receiving interface 101 and a physical layer 102, and the filter module 11 is composed of a plurality of isolation transformers (111, 112, 113, 114), and each of the isolation transformer strings A common mode filter coil is connected. In addition, the network physical layer 102 referred to herein is usually disposed on a motherboard of a computer host or a notebook computer, and the signal receiving interface 101 refers to a four-channel RJ45 connector module. The anti-surge protection circuit 1 for the connector is further described, wherein the first protection component group 12 is connected between the filter module 11 and the signal receiving interface 101; thus, when a high voltage surge is generated The first protection component group 12 absorbs and blocks the high voltage or high current instantaneously generated by the high voltage surge to prevent high voltage or high current from burning the network physical layer 102 or having one of the network physical layers 102. Computer motherboard. Moreover, as shown, the first protection element group 12 is composed of a plurality of transient voltage suppressors (121, 122, 123, 124). In practical applications, the Transient Voltage Suppressor (TVS) may be an arc suppression circuit. (crowbar circuit), filter, clamp element, or surge absorbing element. Further, in a detailed electrical connection relationship, the first transient voltage suppressor 121 is connected in parallel to the right side of the first common mode filter coil 111a of the filter module 11 and the signal receiving interface 101; And second The transient voltage suppressor 122 is connected in parallel between the right side of the second common mode filter coil 112a of the filter module 11 and the signal receiving interface 101; in addition, the third transient voltage suppressor 123 is connected in parallel The method is connected between the right side of the third common mode filter coil 113a of the filter module 11 and the signal receiving interface 101. Further, the fourth transient voltage suppressor 124 is connected to the filter mode in a parallel manner. The right side of the fourth common mode filter coil 114a of the group 11 is between the signal receiving interface 101. In the above description, in addition, the primary side of the first isolation transformer 111 of the filter module 11 is coupled to the left side of the first common mode filter coil 111a; the primary side of the second isolation transformer 112 is coupled to the second common mode. The first side of the third isolation transformer 113 is coupled to the left side of the third common mode filter coil 113a; and the primary side of the fourth isolation transformer 114 of the filter module 11 is coupled to the fourth side. The left side of the common mode filter coil 114a.

Different from the first protection component group 12, the second protection component group 13 is connected between the filter module 11 and a ground line GND for coupling a bursty high voltage input to the ground line GND. In the present invention, the second protection component group 13 is a high voltage capacitor C _HV , and the high voltage capacitor C _HV is coupled to the first common mode filter coil 111 a by a first resistor Im1. The second common mode filter coil 112a, the third common mode filter coil 113a, and the center tap 右侧 on the right side of the fourth common mode filter coil 114a.

Furthermore, the third protection component group 14 is connected in parallel to the second protection element. The set 13 is arranged such that when the high voltage surge is generated, the third protection component group 14 simultaneously absorbs and blocks the high voltage or high current instantaneously generated by the high voltage surge, and further penetrates the ground. The line releases the high voltage or high current it absorbs. In the practical application of the circuit, the third protection component group 14 may be a semiconductor discharge tube (TSS) or a gas discharge tube (GDT). In addition, as shown in FIG. 6 , in the anti-surge protection circuit 1 for a connector of the present invention, a common mode signal sensing terminal (CM Sense) is disposed in the filter module 11 . The analog signal sensing terminal is coupled to the network physical layer 102, and the common mode signal sensing terminal is coupled to a common mode filter capacitor CCM for detecting the common mode signal and transmitting to the filter module 11 and the A common mode noise between the network physical layers 102 is coupled to the ground line GND.

The circuit structure of the anti-surge protection circuit 1 for a connector of the present invention and the electrical connection between the respective circuit units thereof are clearly illustrated by the aid of the fourth, fifth and sixth figures. Connection relationship. Further, the amplification application of the anti-surge protection circuit 1 for the connector will be described below through an exploded view of the packaged electronic component shown in FIG. As shown in the seventh figure, the filter module 11, the first protection component group 12, the second protection component group 13, and the third protection component group 14 can be integrated on a circuit board 2; An input terminal group 21 and an output terminal group 22 are disposed on the circuit board 2, so that the filter module 11 can be coupled to the The input terminal group 21 and the output terminal group 22 are further coupled to the signal receiving interface 101 and the network physical layer 102 via the input terminal group 21 and the output terminal group 22, respectively. Corresponding to the circuit diagram of the fourth figure, the number of terminals of the input terminal group 21 is 12, which is equal to the number of terminals (or the number of signal lines) of the filter module 11; different from the input terminal group 21, the output terminal group 22 The number of terminals is 13, because the output terminal group 22 further includes a ground terminal T corresponding to the ground line GND. Moreover, the filter module 11, the first protection component group 12, the second protection component group 13, the third protection component group 14, and the circuit board 2 can be further encapsulated by an epoxy resin cover 20 into a package. The electronic component, in this way, completes the integration of the anti-surge protection circuit for the connector of the present invention; as shown, in the packaged electronic component 1a, the input terminal group 21 and the output terminal group 22 It is exposed outside the epoxy resin cover.

In addition to the first embodiment of the anti-surge protection circuit 1 for a connector of the present invention illustrated in the fourth, fifth and sixth figures, the connector for use as shown in the eighth diagram The circuit structure of the second embodiment of the anti-surge protection circuit 1 comprises: a filter module 11, a first protection component group 12, and a second protection component group 13 And a third protection component group 14.

The same as the first embodiment, the two ends of the filter module 11 in the circuit of the second embodiment are respectively coupled to the signal receiving interface 101 and the network entity layer 102, and the filtering module 11 is composed of a plurality of Isolation transformer (111, 112, 113, 114, 115), and each isolation transformer is connected in series with a common mode filter coil. However, the electrical connection relationship between the respective circuit units of the second embodiment is different from that of the foregoing first embodiment. As shown in the eighth embodiment, in the circuit architecture of the second embodiment, the first transient voltage suppressor 121 of the first protection component group 12 is connected to the first common mode of the filter module 11 in parallel. The right side of the filter coil 111a is connected to the signal receiving interface 101; the second transient voltage suppressor 122 is connected in parallel to the right side of the second common mode filter coil 112a of the filter module 11 and the signal receiving interface 101. The third transient voltage suppressor 123 is connected in parallel between the right side of one of the third common mode filter coils 113a of the filter module 11 and the signal receiving interface 101; the fourth transient voltage suppressor The 124 is connected in parallel between the right side of the fourth common mode filter coil 114a of the filter module 11 and the signal receiving interface 101; and the Nth transient voltage suppression of the first protection element group 12 The device 125 is connected in parallel to the right side of the Nth common mode filter coil 115a of the filter module 11.

According to the above description, the primary side of the first isolation transformer 111 of the first protection component group 12 is coupled to the left side of the first common mode filter coil 111a; and the primary side of the second isolation transformer 112 is coupled to the first The first side of the second common-mode filter coil 113a is coupled to the left side of the third common-mode filter coil 113a; and the primary side of the fourth isolation transformer 114 is coupled to the fourth common mode. Left of filter coil 114a The primary side of the Nth isolation transformer 115 is coupled to the left side of the Nth common mode filter coil 115a.

The electrical connection relationship between the circuit units of the second embodiment is further explained, wherein the high voltage capacitor CHV (the second protection component group 13) is coupled to the first common mode filter by the first resistor Im1 The coil 111a, the second common mode filter coil 112a and the center tap 右侧 on the right side of the third common mode filter coil 113a. And one end of the first protection component 141 of the third protection component group 14 is coupled to the first resistor Im1, the center tap of the right side of the first common mode filter coil 111a, and the second common mode filter coil. a central tap 右侧 on the right side of the 112a, and a center tap 右侧 on the right side of the third common mode filter coil 113a, and the other end of the first protection element 141 is coupled to the ground line; and the third protection element group One end of one of the second protection elements 142 is coupled to the right side of the Nth common mode coil 115a, one end of a second resistor Im2, and a center tap of the right side of the fourth common mode filter coil 114a; The other end of the second resistor Im2 is coupled to the high voltage capacitor CHV and the first resistor Im1, and the other end of the second protection component 142 is coupled to the ground.

Thus, the above-mentioned system has completely and clearly explained the circuit structure of the anti-surge protection circuit for the connector of the present invention and the electrical connection relationship between the respective circuit units; The following advantages:

1. The present invention is a 10 Gbit/s transmission rate for a connector The anti-surge protection circuit is provided with a plurality of anti-surge protection elements between the filter module 11 (isolation transformer module) and the motherboard having the network physical layer 102, and simultaneously with the filter module 11 and the ground A plurality of anti-surge protection elements are disposed between the lines; by such setting, the anti-surge protection elements can be used to absorb and block the high voltage or high current generated by the high voltage surge when a high voltage surge is generated. In order to prevent high voltage or high current from burning the network physical layer 102 or the motherboard having the network physical layer 102.

2. According to the above first point, at the same time, when the high voltage surge is generated, the anti-surge protection elements simultaneously absorb and block the high voltage or high current instantaneously generated by the high voltage surge, and further The high voltage or high current absorbed by the ground wire is released through the ground wire.

3. Further, the respective circuit units and electronic components of the anti-surge protection circuit 1 for a connector of the present invention can be simultaneously integrated onto a circuit board 2; thus, an input terminal provided through the circuit board 2 is provided. The group 21 and the output terminal group 22 enable the filter module 11 of the anti-surge protection circuit to be coupled to the signal receiving interface 101 and the physical layer of the network through the input terminal group 21 and the output terminal group 22, respectively. 102; and further, the anti-surge protection circuit 1 for a connector of the present invention can be packaged into a package electronic component by an epoxy resin cover 20, thereby completing the connector for the connector of the present invention. The anti-surge protection circuit 1 is integrated, thereby amplifying the application of the anti-surge protection circuit 1 for the connector.

It must be emphasized that the above detailed description is for this issue. The specific embodiments of the present invention are not intended to limit the scope of the invention, and the equivalents of the embodiments of the present invention should be included in the scope of the present invention.

1‧‧‧Anti-surge protection circuit for connectors

11‧‧‧Filter module

12‧‧‧First Protection Element Group

13‧‧‧Second protection component group

14‧‧‧ Third protection component group

101‧‧‧Signal receiving interface

102‧‧‧Network physical layer

111a‧‧‧First Common Mode Filter Coil

112a‧‧‧Second common mode filter coil

113a‧‧‧ Third common mode filter coil

114a‧‧‧Fourth Common Mode Filter Coil

121‧‧‧First transient voltage suppressor

122‧‧‧Second transient voltage suppressor

123‧‧‧ Third transient voltage suppressor

124‧‧‧4th transient voltage suppressor

GND‧‧‧ ground wire

C _HV ‧‧‧ high voltage capacitor

Im1‧‧‧First resistance

Claims (16)

An anti-surge protection circuit for a connector includes: a filter module, one end of which is coupled to a signal receiving interface, and the other end of which is coupled to a network physical layer; a first protection component The group is connected between the filter module and the signal receiving interface, wherein when a high voltage surge is generated, the first protection component group absorbs the high voltage or high current generated by the high voltage surge and Blocking to prevent high voltage or high current from burning the physical layer of the network or having a motherboard of the physical layer of the network; a second protection component group is connected between the filter module and a ground line for a bursty high voltage input coupled to the ground line; and a third set of protection elements coupled in parallel to the second set of protection elements, wherein when the high voltage surge is generated, the third set of protection elements are simultaneously The high voltage or high current instantaneously generated by the high voltage surge is absorbed and blocked, and the high voltage or high current absorbed by the high voltage surge is further released through the ground. The anti-surge protection circuit for a connector according to claim 1, wherein the filter module is composed of a plurality of isolation transformers and a plurality of common mode filter coils, and the plurality of isolations are The primary side of the transformer is coupled to the left side of the plurality of common mode filter coils, respectively. The anti-surge protection circuit for a connector according to claim 2, wherein the plurality of isolation transformers comprise at least a first isolation transformer, a second isolation transformer, and a third isolation transformer. And a fourth isolation transformer; and the plurality of common mode filter coils at least comprise a first common mode filter coil, a second common mode filter coil, a third common mode filter coil, and a fourth common mode Filter coil. The anti-surge protection circuit for a connector according to claim 3, wherein the first protection element group is composed of a plurality of Transient Voltage Suppressors (TVS). The anti-surge protection circuit for a connector according to claim 4, wherein the plurality of transient voltage suppressors comprise at least a first transient voltage suppressor and a second transient. a voltage suppressor, a third transient voltage suppressor, and a fourth transient voltage suppressor, and the first transient voltage suppressor, the second transient voltage suppressor, and the third transient voltage suppressor And the fourth transient voltage suppressor is respectively connected to the right side of the first common mode filter coil, the second common mode filter coil, the third common mode filter coil, and the fourth common mode filter coil, and Between the filter module and the signal receiving interface. The anti-surge protection circuit for a connector according to claim 4, wherein the transient voltage suppressor is selected from any one of the following groups: a crowbar circuit , filters, clamp components and surge absorbers. The anti-surge protection circuit for a connector according to claim 3, wherein the second protection component group is a high voltage capacitor, and the high voltage capacitor is coupled to the resistor by a resistor. a first common mode filter coil, the second common mode filter coil, the third common mode filter coil, and a center tap of the primary side of the fourth common mode filter coil. The anti-surge protection circuit for a connector according to claim 1, wherein the third protection element group is selected from any one of the group consisting of a semiconductor discharge tube and a gas discharge tube group. The anti-surge protection circuit for a connector according to claim 1, wherein the signal receiving interface is an RJ45 connector module. The anti-surge protection circuit for a connector according to the second aspect of the invention, wherein the filter module further comprises a common mode signal sensing terminal coupled to the physical layer of the network, and the common mode signal sensing terminal A common mode filter capacitor is coupled to detect a common mode signal and couple a common mode noise transmitted between the filter module and the physical layer of the network to The ground wire. The anti-surge protection circuit for a connector according to claim 2, wherein the plurality of isolation transformers comprise at least a first isolation transformer, a second isolation transformer, and a third isolation transformer. a fourth isolation transformer, and an Nth isolation transformer; and the plurality of common mode filter coils at least comprise a first common mode filter coil, a second common mode filter coil, a third common mode filter coil, A fourth common mode filter coil and an Nth common mode filter coil. The anti-surge protection circuit for a connector according to claim 11, wherein the plurality of transient voltage suppressors comprise at least a first transient voltage suppressor and a second transient. a voltage suppressor, a third transient voltage suppressor, a fourth transient voltage suppressor, and an Nth transient voltage suppressor; and the first transient voltage suppressor, the second transient voltage suppression The third transient voltage suppressor, the fourth transient voltage suppressor, and the Nth transient voltage suppressor are respectively connected to the first common mode filter coil, the second common mode filter coil, and the The third common mode filter coil, the fourth common mode filter coil, and the right side of the Nth common mode filter coil are interposed between the filter module and the signal receiving interface. The anti-surge protection circuit for a connector according to claim 12, wherein the second protection component group is a high voltage capacitor, and the high voltage capacitor is coupled by a first resistor. a center tap 右侧 to the right of the first common mode filter coil, the second common mode filter coil, and the third common mode filter coil. The anti-surge protection circuit for a connector according to claim 13, wherein the third protection element group is selected from any one of the group consisting of a semiconductor discharge tube and a gas discharge tube. The anti-surge protection circuit for a connector according to claim 14, wherein the third protection element group includes at least a first protection element and a second protection element, and the first protection element One end is coupled to the first resistor and the first common mode filter coil, the second common mode filter coil and a center tap of the right side of the third common mode filter coil, and the other end of the first protection element is Coupled to the ground. The anti-surge protection circuit for a connector according to claim 15, wherein one end of the second protection element is simultaneously coupled to one end of a second resistor, to the right side of the Nth common mode coil, and a central tap of the right side of the fourth common mode filter coil; and the second resistor knows that the other end is coupled to the high voltage capacitor and the first resistor.