JPH071748Y2 - Substrate resistance and surge absorber with safety mechanism - Google Patents
Substrate resistance and surge absorber with safety mechanismInfo
- Publication number
- JPH071748Y2 JPH071748Y2 JP7281190U JP7281190U JPH071748Y2 JP H071748 Y2 JPH071748 Y2 JP H071748Y2 JP 7281190 U JP7281190 U JP 7281190U JP 7281190 U JP7281190 U JP 7281190U JP H071748 Y2 JPH071748 Y2 JP H071748Y2
- Authority
- JP
- Japan
- Prior art keywords
- insulating substrate
- safety mechanism
- surge
- substrate
- absorbing element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000758 substrate Substances 0.000 title claims description 51
- 239000006096 absorbing agent Substances 0.000 title claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000035939 shock Effects 0.000 claims description 14
- 238000000605 extraction Methods 0.000 description 5
- 238000010891 electric arc Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Landscapes
- Thermistors And Varistors (AREA)
- Emergency Protection Circuit Devices (AREA)
- Details Of Resistors (AREA)
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、保安機構を備えてなる抵抗膜を被着した基板
抵抗、及び電話回線等に印加される誘導雷等のサージを
吸収するサージ吸収器に係り、特に破壊時に短絡するサ
ージ吸収素子に直列接続するための保安機構付基板抵
抗、並びに上記サージ吸収素子と保安機構付基板抵抗と
を直列接続したサージ吸収器に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention is a surge that absorbs surges such as induced lightning that is applied to a substrate resistance and a telephone line that are coated with a resistance film. The present invention relates to an absorber, and more particularly to a board resistor with a safety mechanism for connecting in series to a surge absorbing element that is short-circuited at the time of breakdown, and a surge absorber in which the surge absorbing element and a substrate resistor with a protecting mechanism are connected in series.
［従来の技術］ 従来、サージ吸収素子として金属酸化物等の電圧非直線
特性を有するバリスタや、気密容器に収容した放電間隙
による放電現象を利用するアレスタが電話回線等の電子
回路に使用されている。[Prior Art] Conventionally, as a surge absorbing element, a varistor having a voltage non-linear characteristic such as a metal oxide or an arrester utilizing a discharge phenomenon due to a discharge gap housed in an airtight container has been used in an electronic circuit such as a telephone line. There is.
これらのサージ吸収素子は、電子回路に誘導雷等のサー
ジが印加された場合に、サージを吸収して電子回路が損
傷することを防ぐものである。These surge absorbing elements absorb the surge and prevent the electronic circuit from being damaged when a surge such as induced lightning is applied to the electronic circuit.
［考案が解決しようとする課題］ しかしながら、上述したサージ吸収素子のうちバリスタ
は、サージパルスを繰り返し吸収して疲労が蓄積された
り、連続した過電流が通電されたりすることにより、遂
には破壊に至り電気的に短絡状態となるものであった。[Problems to be Solved by the Invention] However, among the above-described surge absorbing elements, the varistor is eventually destroyed due to repeated absorption of surge pulses to accumulate fatigue and continuous overcurrent. It was an electrical short circuit.
また、電話機にあってはCSAやUL等の安全規格による過
電圧試験が実施されており、この過電圧試験は電話回線
に電力線が接触した場合を想定したものであって、サー
ジ吸収素子の定格電圧（直流放電開始電圧）を上回る交
流電圧を連続して印加するものである。そして、この過
電圧が印加される電子回路にアレスタが使用されている
場合には、アレスタの放電間隙に生成するアーク放電に
よる過大電流の通電が持続状態となり、ひいては放電電
極が溶融してサージ吸収素子であるアレスタが短絡破壊
することとなる。更に、過大電流の持続通電に伴う発熱
によって気密容器も溶融して、遂にはアレスタを実装し
た回路基板が焼損するに至り、これにより上記過電圧試
験における合格基準を充足するに至らないことが多々あ
った。また、上述した現象が実際の使用状態に於いて発
生した場合には、火災に至る虞れもある。In addition, telephones have been subjected to overvoltage tests in accordance with safety standards such as CSA and UL.This overvoltage test is for the case where the power line comes into contact with the telephone line, and the rated voltage of the surge absorbing element ( The AC voltage continuously exceeds the DC discharge start voltage). When an arrester is used in the electronic circuit to which this overvoltage is applied, energization of the excessive current due to the arc discharge generated in the discharge gap of the arrester is maintained, and the discharge electrode melts and the surge absorbing element is melted. Therefore, the arrester is short-circuited and destroyed. Furthermore, the airtight container is also melted by the heat generated by the continuous energization of the excessive current, and eventually the circuit board on which the arrester is mounted is burned out, which often fails to satisfy the above-mentioned passing voltage test acceptance criteria. It was In addition, when the above-mentioned phenomenon occurs in the actual use condition, there is a risk of fire.
このため、上記サージ吸収素子と過電流遮断手段である
ヒューズとを直列接続することが考えられるのである
が、ヒューズにあっては、その溶断特性が電流値と印加
時間とによって大きく変化することから、サージ吸収素
子に接続する保安機構としては適さないものであった。Therefore, it is conceivable to connect the surge absorbing element and a fuse that is an overcurrent cutoff device in series. However, since the fusing characteristic of the fuse changes greatly depending on the current value and the application time. However, it was not suitable as a safety mechanism connected to the surge absorbing element.
本考案は、上述の点に鑑み案出されたもので、サージ吸
収素子に接続して好適な保安機構と、さらにこの保安機
構をサージ吸収素子に接続することにより、サージ吸収
素子が短絡状態となり過大電流の通電が持続状態となっ
た場合にあっても、サージ吸収素子の焼損事故を防止
し、安全規格に適合する安全性の高いサージ吸収器の実
現を目的とする。The present invention has been devised in view of the above-mentioned point, and by connecting a surge absorbing element to a suitable safety mechanism and further connecting this safety mechanism to the surge absorbing element, the surge absorbing element is short-circuited. It is an object of the present invention to prevent a burnout accident of a surge absorbing element even when the energization of an excessive current is sustained and to realize a highly safe surge absorber that complies with safety standards.
［課題を解決するための手段］ 上述の目的を達成するため、本考案の保安機構付基板抵
抗及びサージ吸収器は、熱衝撃により砕裂する絶縁基板
に、連続した過電流の通電によって熱衝撃を発生する発
熱抵抗膜を被着し、この発熱抵抗膜の対向する辺部に、
一端を外部端子接続部分として上記絶縁基板側縁に並設
してなる１対の電極をそれぞれ接続するとともに、上記
外部端子接続部分相互間に位置する絶縁基板には切欠部
を形成したことを特徴とする保安機構付基板抵抗、及び
短絡状態で破壊するサージ吸収素子と上気保安機構付基
板抵抗とを直列接続したサージ吸収器とするものであ
る。[Means for Solving the Problems] In order to achieve the above-mentioned object, the substrate resistance and surge absorber of the present invention have a thermal shock caused by continuous overcurrent passing through an insulating substrate that is crushed by thermal shock. A heating resistance film that generates is deposited, and on the opposite side portions of the heating resistance film,
A pair of electrodes, which are arranged in parallel on the side edges of the insulating substrate, are connected to one end as external terminal connecting portions, and a notch is formed in the insulating substrate located between the external terminal connecting portions. And a surge absorber that is destroyed in a short circuit state and a substrate resistance with a safety mechanism are connected in series.
［作用］ 本考案の保安機構付基板抵抗は、熱衝撃により砕裂する
絶縁基板に発熱抵抗膜を被着し、そしてこの発熱抵抗膜
の対向する辺部に、一端を外部端子接続部分として絶縁
基板側縁に並設した１対の電極をそれぞれ接続するとと
もに、上記外部端子接続部分相互間に位置する絶縁基板
には切欠部を形成したことにより、上記電極に連続した
過電流が通電されると発熱抵抗膜が急激に高温となって
熱衝撃を絶縁基板に加え、この熱衝撃が上記絶縁基板に
形成された切欠部に案内されて絶縁基板を破砕させる。
そして、絶縁基板に被着された発熱抵抗膜が切断される
ことによって過電流の通電を遮断する。また、上記切欠
部を形成したことで、電極の外部端子接続部分相互間の
沿面距離が長くなり、これにより外部端子接続部分相互
間に高電圧が印加されても沿面放電を生成することがな
い。[Operation] In the substrate resistance with a safety mechanism of the present invention, a heating resistance film is applied to an insulating substrate that is crushed by a thermal shock, and one end is insulated as an external terminal connection portion on the opposite side of the heating resistance film. By connecting a pair of electrodes arranged in parallel on the side edges of the substrate and forming a notch in the insulating substrate located between the external terminal connecting portions, a continuous overcurrent is applied to the electrodes. Then, the heating resistance film suddenly becomes high in temperature and a thermal shock is applied to the insulating substrate, and the thermal shock is guided to the notch formed in the insulating substrate to crush the insulating substrate.
Then, the heating resistance film attached to the insulating substrate is cut off to cut off the overcurrent. Further, by forming the cutout portion, the creeping distance between the external terminal connecting portions of the electrode becomes long, and thus a creeping discharge is not generated even if a high voltage is applied between the external terminal connecting portions. .
更に、本考案のサージ吸収器は、短絡状態で破壊するサ
ージ吸収素子と上記保安機構付基板抵抗とを直列接続し
たので、サージ吸収素子が短絡状態となって連続する過
電流が通電された場合には、保安機構付基板抵抗がその
絶縁基板を砕裂させて過電流を遮断し、サージ吸収素子
による焼損事故を防止する。Furthermore, in the surge absorber of the present invention, the surge absorbing element that breaks in the short circuit state and the above-mentioned substrate resistance with safety mechanism are connected in series. In addition, the substrate resistance with a safety mechanism crushes the insulating substrate and shuts off the overcurrent, thus preventing a burnout accident due to the surge absorbing element.
［実施例］ 以下、図面に基づいて本考案の実施例について説明す
る。[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.
図面は本考案のサージ吸収器を示す正面図である。図中
１はサージ吸収器であり、このサージ吸収器１は、アレ
スタ等の放電型サージ吸収素子２と保安機構付基板抵抗
３とを直列に接続したものである。The drawing is a front view showing the surge absorber of the present invention. In the figure, 1 is a surge absorber, and this surge absorber 1 comprises a discharge type surge absorbing element 2 such as an arrester and a substrate resistor 3 with a safety mechanism connected in series.
上記放電型サージ吸収素子２は、ニッケル等より成る放
電特性の良好な金属の表面をBaOやBaO・Al2O3等のエミ
ッタ物質で覆って形成した一対の棒状放電電極4,4のそ
れぞれの基端部に、ジュメット線より成るリード線5,5
を接続し、これを略平行に対向させて上記放電電極4,4
間に放電間隙６を形成し、更に、これをNe、Ar、He等の
希ガスや窒素ガス等の不活性ガスを主体とした放電ガス
と共に、ガラス管の両端を封止して形成した気密容器７
に封入して、上記リード線5,5を上記気密容器７外へ導
出したものである。The discharge type surge absorbing element 2 has a pair of rod-shaped discharge electrodes 4 and 4 formed by covering the surface of a metal such as nickel having a good discharge characteristic with an emitter material such as BaO or BaO.Al 2 O 3 . At the base end, a lead wire made of Dumet wire 5,5
The discharge electrodes 4, 4 by connecting them in parallel and facing each other substantially in parallel.
A discharge gap 6 is formed between them, and is further hermetically sealed by sealing both ends of the glass tube with a discharge gas mainly composed of a rare gas such as Ne, Ar, or He or an inert gas such as nitrogen gas. Container 7
Then, the lead wires 5 and 5 are led out to the outside of the airtight container 7.
また、上記保安機構付基板抵抗３は、アルミナ、フォル
ステライト、ステアタイト等のセラミックから成る板厚
0.1〜1.0mmの絶縁基板８に対し、その一方面に、ルテニ
ウム系ペースト等より成る発熱抵抗膜９を略長形に被着
し、この発熱抵抗膜９の一方の対向する辺部に、Ag・Pd
系ペースト等の電気的良導体より成る取り出し電極10,1
1を被着形成するとともに、この取出し電極10,11の一端
を絶縁基板８の側縁に並設して外部端子接続部分10a,11
aとし、この外部端子接続部分10a,11aに外部端子12,12
をそれぞれハンダ付け等により固着している。The board resistor 3 with a safety mechanism is made of a ceramic such as alumina, forsterite or steatite.
On an insulating substrate 8 of 0.1 to 1.0 mm, a heating resistor film 9 made of ruthenium-based paste or the like is attached to one surface of the insulating substrate 8 in a substantially elongated shape.・ Pd
Extraction electrode 10,1 made of good electrical conductor such as paste
1 is adhered and formed, and one ends of the extraction electrodes 10 and 11 are juxtaposed to the side edges of the insulating substrate 8 to connect the external terminal connection portions 10a and 11a.
a, and connect the external terminals 12, 12 to the external terminal connecting parts 10a, 11a.
Are fixed by soldering or the like.
そして、上記外部端子接続部分10a,11a相互間に位置す
る絶縁基板８には、本実施例にあっては半円状の切欠部
8aを形成している。The insulating substrate 8 located between the external terminal connecting portions 10a and 11a has a semicircular cutout portion in this embodiment.
Forming 8a.
また、上記切欠部8aの底部と発熱抵抗膜９との間隔ｌ
を、切欠部8aと対向する絶縁基板８の上縁と発熱抵抗膜
９との間隔ｍと略同寸法とすることで、発熱抵抗膜９に
発生した熱衝撃が、絶縁基板８の上下において偏ること
なく均等に絶縁基板８に加わり、これにより絶縁基板８
を上下方向に一様に砕裂させるものである。In addition, the distance l between the bottom of the cutout portion 8a and the heating resistance film 9
Is approximately the same as the distance m between the heating resistor film 9 and the upper edge of the insulating substrate 8 facing the cutout 8a, so that the thermal shock generated in the heating resistor film 9 is biased above and below the insulating substrate 8. Without evenly adding to the insulating substrate 8
Is to be crushed uniformly in the vertical direction.
13は、放電型サージ吸収素子２の一方のリード線５と、
保安機構付基板抵抗３の一方の外部端子12とを電気的に
接続するための端子板等における接続部である。13 is one of the lead wires 5 of the discharge type surge absorber 2 and
It is a connecting portion in a terminal plate or the like for electrically connecting one external terminal 12 of the substrate resistance 3 with a security mechanism.
上記発熱抵抗膜９の両端間の抵抗値は、各種安全規格に
おける試験条件に合わせて１Ω〜300Ωの範囲内となる
ように、構成成分を選定するとともに、その厚さを適宜
設定する。The constituent components are selected and the thickness thereof is appropriately set so that the resistance value between both ends of the heating resistance film 9 falls within the range of 1Ω to 300Ω according to the test conditions in various safety standards.
更に、絶縁基板８上に被着形成された発熱抵抗膜９、及
び外部端子接続部分10a,11aを除いた取出し電極10,11
を、ホウケイ酸ガラスやビスマスガラス等の脱鉛ガラス
14により10μｍ〜100μｍの厚さで被覆することによ
り、絶縁被膜となるばかりでなく、発熱抵抗膜９表面や
取出し電極10,11間における沿面放電の発生を防ぐこと
ができる。Further, the heat generating resistance film 9 formed on the insulating substrate 8 and the extraction electrodes 10 and 11 excluding the external terminal connecting portions 10a and 11a.
Lead-free glass such as borosilicate glass and bismuth glass
By coating with 14 to a thickness of 10 μm to 100 μm, not only an insulating film is formed, but also generation of creeping discharge on the surface of the heating resistance film 9 and between the extraction electrodes 10 and 11 can be prevented.
然して、本考案のサージ吸収器１を電話回線等に接続す
れば、誘導雷等のサージが印加された場合には、放電型
サージ吸収素子２においては放電間隙６に放電が生成し
てサージを吸収するが、保安機構付基板抵抗３の発熱抵
抗膜９は、サージの印加速度が短く余り発熱しないこと
から絶縁基板８には熱衝撃が加わることす少ない。ま
た、発熱抵抗膜９の表面や外部端子12,12間において沿
面放電を発生することもなく、確実にサージを吸収す
る。However, if the surge absorber 1 of the present invention is connected to a telephone line or the like, when a surge such as inductive lightning is applied, a discharge is generated in the discharge gap 6 in the discharge type surge absorbing element 2 to generate the surge. Although absorbed, the heat generation resistance film 9 of the substrate resistance 3 with safety mechanism has a low surge application speed and does not generate much heat, so that thermal shock is less likely to be applied to the insulating substrate 8. Further, the creeping discharge is not generated on the surface of the heating resistance film 9 or between the external terminals 12 and 12, and the surge is reliably absorbed.
そして、電話回線等に上記放電型サージ吸収素子２の定
格電圧を上回る交流電圧が長時間印加された場合には、
放電型サージ吸収素子２においては放電電極4,4間のア
ーク放電が持続状態となるものの、保安機構付基板抵抗
３の発熱抵抗膜９が急激に発熱して絶縁基板８に熱衝撃
を加え、絶縁基板８を切欠部8aの延長線に沿って上下方
向に砕裂させる。これにより、絶縁基板８に被着形成さ
れた電流の経路である発熱抵抗膜９は切断され、保安機
構付基板抵抗３はアーク放電を持続させる過大電圧を遮
断し、サージ吸収素子の焼損を防止する。When an AC voltage exceeding the rated voltage of the discharge type surge absorbing element 2 is applied to the telephone line for a long time,
In the discharge type surge absorbing element 2, although the arc discharge between the discharge electrodes 4 and 4 is in a continuous state, the heat generating resistance film 9 of the substrate resistor 3 with a safety mechanism suddenly generates heat and a thermal shock is applied to the insulating substrate 8. The insulating substrate 8 is crushed in the vertical direction along the extension line of the cutout 8a. As a result, the heating resistance film 9 that is a current path formed on the insulating substrate 8 is cut, and the substrate resistor 3 with a safety mechanism cuts off an excessive voltage that sustains arc discharge, and prevents the surge absorber from burning. To do.
尚、本実施例にあっては、サージ吸収素子としてアレス
タ等の放電型サージ吸収素子を用いたが、勿論これに限
定されることはなく、電圧非直線特性を有するバリス
タ、もしくは、バリスタの両端に放電間隔を設け、これ
を気密容器内に収容した複合型サージ吸収素子であって
もよい。In this embodiment, a discharge type surge absorbing element such as an arrester was used as the surge absorbing element, but of course the invention is not limited to this, and a varistor having a voltage non-linear characteristic or both ends of the varistor is used. A composite type surge absorbing element in which a discharge interval is provided in the airtight container and which is housed in an airtight container may be used.
［考案の効果］ 以上詳述の如く、本考案の保安機構付基板抵抗によれ
ば、熱衝撃により破砕する絶縁基板に、連続した過電流
の通電によって熱衝撃を発生する発熱抵抗膜を被着し、
そしてこの発熱抵抗膜の対向する辺部に、一端を外部端
子接続部分として絶縁基板側縁に並設した１対の電極を
それぞれ接続するとともに、上記外部端子接続部分相互
間に位置する絶縁基板には切欠部を形成してなる保安機
構付基板抵抗と、短絡状態で破壊するサージ吸収素子と
を直列接続したことにより、各種安全規格による過電圧
試験や回線事故等、サージ吸収素子が短絡状態となり過
大電流の通電が持続状態となった場合であっても、発熱
抵抗膜による熱衝撃が上述した絶縁基板を砕裂させ、電
流の経路であるところの発熱抵抗膜を切断するものであ
る。そして、短絡状態で破壊するサージ吸収素子と上記
保安機構付基板抵抗とを直列接続してなる本考案のサー
ジ吸収器は、過電圧試験や回線事故等に上述の如くサー
ジ吸収素子における過大電流の通電を遮断して焼損事故
を防止することができることから、優れた安全性を有し
安全規格に充分適合することが可能となる。[Advantages of the Invention] As described in detail above, according to the substrate resistance with a safety mechanism of the present invention, a heating resistance film that generates thermal shock due to continuous overcurrent application is attached to an insulating substrate that is crushed by thermal shock. Then
A pair of electrodes arranged in parallel on the side edge of the insulating substrate with one end serving as an external terminal connecting portion is connected to the opposing side portions of the heat generating resistance film, and the insulating substrate is located between the external terminal connecting portions. Is connected in series with a board resistance with a safety mechanism that forms a notch and a surge absorbing element that breaks in a short circuit state, so that the surge absorbing element is short circuited due to overvoltage tests and line accidents according to various safety standards. Even when the current is continuously applied, the heat shock due to the heat generating resistance film causes the insulating substrate to be crushed and the heat generating resistance film, which is a current path, is cut. The surge absorber of the present invention, which is formed by connecting in series a surge absorber that breaks in a short-circuit state and the above-mentioned board resistor with a safety mechanism, is used for overvoltage tests and line faults, etc. Since it is possible to prevent the burnout accident by shutting off, it is possible to have excellent safety and sufficiently comply with safety standards.
また、保安機構付基板抵抗の外部端子接続部分相互間に
位置する絶縁基板には切欠部を形成したことにより、発
熱抵抗膜の熱衝撃による絶縁基板の砕裂がよりスムーズ
となるとともに、サージが印加された場合に上記外部端
子接続部分において沿面放電が生成することなく、より
一層安全性に優れたサージ吸収器を提供することが可能
となるものである。In addition, by forming a notch in the insulating substrate located between the external terminal connection parts of the substrate resistor with safety mechanism, the insulating substrate is more smoothly broken by the thermal shock of the heating resistor film, and surges are prevented. It is possible to provide a surge absorber which is further excellent in safety without generating a creeping discharge in the external terminal connecting portion when applied.
図面は本考案のサージ吸収器を示す正面図である。 １……サージ吸収器、２……放電型サージ吸収素子、３
……保安機構付基板抵抗、８……絶縁基板、8a……切欠
部、９……発熱抵抗膜、10,11……取出し電極、10a,11a
……外部端子接続部分The drawing is a front view showing the surge absorber of the present invention. 1 ... Surge absorber, 2 ... Discharge type surge absorber, 3
...... Substrate resistance with safety mechanism, 8 ...... Insulation substrate, 8a ...... Notch, 9 ...... Heat generation resistance film, 10, 11 ...... Extraction electrode, 10a, 11a
...... External terminal connection part
Claims (2)
た過電流の通電によって熱衝撃を発生する発熱抵抗膜を
被着し、この発熱抵抗膜の対向する辺部に、一端を外部
端子接続部分として上記絶縁基板側縁に並設してなる１
対の電極をそれぞれ接続するとともに、上記外部端子接
続部分相互間に位置する絶縁基板には切欠部を形成した
ことを特徴とする保安機構付基板抵抗。1. An insulating substrate that is shattered by thermal shock is coated with a heating resistor film that generates thermal shock when a continuous overcurrent is passed through, and one end of the heating resistor film has an external terminal at opposite sides. 1 which is provided in parallel on the side edge of the insulating substrate as a connecting portion
A substrate resistor with a safety mechanism, characterized in that a pair of electrodes are connected to each other and a cutout is formed in the insulating substrate located between the external terminal connecting portions.
項１記載の保安機構付基板抵抗とを直列接続したことを
特徴とするサージ吸収器。2. A surge absorber characterized in that a surge absorbing element that breaks in a short circuit state and the substrate resistance with a safety mechanism according to claim 1 are connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7281190U JPH071748Y2 (en) | 1990-07-09 | 1990-07-09 | Substrate resistance and surge absorber with safety mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7281190U JPH071748Y2 (en) | 1990-07-09 | 1990-07-09 | Substrate resistance and surge absorber with safety mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0431290U JPH0431290U (en) | 1992-03-13 |
| JPH071748Y2 true JPH071748Y2 (en) | 1995-01-18 |
Family
ID=31611081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7281190U Expired - Lifetime JPH071748Y2 (en) | 1990-07-09 | 1990-07-09 | Substrate resistance and surge absorber with safety mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071748Y2 (en) |
-
1990
- 1990-07-09 JP JP7281190U patent/JPH071748Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0431290U (en) | 1992-03-13 |
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