EP1412953B1 - Electroceramic component - Google Patents
Electroceramic component Download PDFInfo
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- EP1412953B1 EP1412953B1 EP02754320A EP02754320A EP1412953B1 EP 1412953 B1 EP1412953 B1 EP 1412953B1 EP 02754320 A EP02754320 A EP 02754320A EP 02754320 A EP02754320 A EP 02754320A EP 1412953 B1 EP1412953 B1 EP 1412953B1
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- electrical
- conductor piece
- component according
- base body
- electrical conductor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
Definitions
- the invention relates to an electroceramic device with a thermal fuse.
- Such devices include, for example, varistors.
- the main body of such known components is often made of a mixture of different metal oxides, for example based on zinc oxide.
- Varistors have a non-linear voltage-dependent resistance change used to protect an electrical circuit from overvoltage. The resistance of varistors decreases with increasing applied voltage.
- a Varistor for the protection of electrical circuits against overvoltages and excess temperatures. It consists of a mechanical construction in which a low-melting solder is applied to the varistor, which fixes a resilient power supply line. Upon the occurrence of overvoltages and the associated overheating of the varistor, the solder melts, the spring construction subsequently producing an irreversible low-resistance short-circuit bridging with a second current feed line. The spring construction also increases the distance between the resilient power supply line and the varistor to prevent electrical flashover.
- the disadvantages of this mechanical construction are that it is very difficult to implement.
- Publication JP 04 151 804 A discloses a temperature fuse integrated in a varistor housing, which is connected via an electrical line to an inner electrode of the varistor.
- the temperature fuse is surrounded by a material that allows heat conduction between the varistor and the temperature fuse. In the event of overheating of the varistor as a result of prolonged overvoltage, the heat of the varistor can thus be transferred to the temperature fuse and triggered.
- the disadvantage of this design is that the thermal fuse is not in direct thermal contact with the varistor and therefore due to losses during heat transfer is triggered only at higher temperatures.
- the invention is therefore based on the object to provide a simple thermal fuse for electroceramic devices available, which avoids the disadvantages mentioned.
- the invention describes an electroceramic component having at least one first ceramic base body.
- the operating voltage does not exceed a predetermined allowable limit
- the first ceramic base body contacts the electrical conductor piece and is therefore in direct thermal contact with it.
- the first ceramic base body heats up greatly due to the increasing power loss, so that the electrical conductor piece is heated. It is designed so that it from a certain temperature melts and thus interrupts the flow of current.
- An electrically insulating material prevents electrical flashover between the electrically conductive regions that have been contacted by the electrical conductor piece, thus ensuring a reliable interruption of the current path.
- the electrical conductor piece according to the invention is in direct thermal contact with the first ceramic body. For this reason, no loss of heat transfer must take place through a sheath of the first ceramic body. The overtemperature protection can therefore be triggered at lower temperatures on the first body and is thus much more sensitive than conventional fuses.
- Another advantage results from the fact that after the melting of the electrical conductor piece, an electrical flashover according to the invention can be prevented in a simple manner by the electrically insulating material. There are no complicated mechanical spring structures needed to move the contacts apart after melting the electrical conductor piece.
- the first base body may contain, for example, a varistor ceramic based on zinc oxide.
- the electrical conductor piece is advantageously a low-melting solder, for example with a melting point between about 80 ° C and 180 ° C.
- free-flowing or flowable materials such as quartz sand or glass beads can be used as the electrically insulating material.
- an encapsulation for example made of temperature-resistant plastic such as polyphenylene sulfide (PPS) can be provided, which creates a container for the insulating free-flowing or flowable material and at the same time increases the mechanical stability of the device.
- PPS polyphenylene sulfide
- the entire electroceramic device with the integrated thermal fuse and the encapsulation can advantageously be enveloped by a single housing. This creates a compact device with reduced space requirements.
- FIGS. 1A and 1B show a series connection of two varistor basic bodies 1 and 30, each with approximately 60 or 75 V operating voltage, so that an operating voltage of approximately 130 V can be realized in total.
- the two Varistor ground stresses 1 and 30 are connected by the electrical conductor portion 10, a low melting solder having a melting point of about 80 ° C to 180 ° C, electrically conductive together.
- the electrically insulating material 20 can advantageously be designed as quartz sand, which is arranged between the two Varistorground stressesn and surrounds the solder 10.
- electrical contacts 5 and 15 can serve, for example, tinned copper wires.
- a plastic ring 50 advantageously made of a temperature resistant Plastic such as polyphenylene sulfide (PPS) creates together with the two ceramic bodies 1 and 30 as a lid a cavity for the insulating material 20.
- the cavity can be closed by a plug 50A.
- the entire components with integrated thermal fuse can advantageously be surrounded by a housing 45, which consists for example of epoxy plastic.
- the electrical conductor portion 10 of the device melts reliably within a few seconds.
- the temperature at the housing of the device is only about 120 ° C. This ensures that the device does not start to burn and does not set objects in its environment on fire.
- the use of a solder wire about 1 mm thick can withstand current surges of about 8000 A (pulse shape 8/20 ⁇ s). That is, no losses in Stromableitrac must be taken into account by the invention Overtemperaturtechnisch.
- varistor materials 1 and 30 for example based on SiC.
- the embodiment with the two ceramic bodies also has the advantage that a spatial separation of the electrical contacts 5 and 15 of the electrical conductor piece 10 is possible.
- the electrical conductor piece is located in the intermediate space 35 between the two Varistor ground stressesn, while the electrical contacts each contact the gap facing away from the sides 1A, 30A Varistor ground emotions.
- a good thermal shielding of the electrical conductor portion of the electrical contacts can be ensured, so that a high soldering heat resistance is given. This is contrary to many conventional ones Thermal fuses easy soldering or welding of electrical contacts possible without triggering the thermal fuse.
- FIG. 2A shows a plan view and FIG. 2B shows a cross section through a varistor according to the invention with only one varistor base body 1.
- the electrical conductor piece 10 is connected directly to the second electrical contact 15 and the varistor base body 1.
- An advantageously designed as a plastic ring 50 creates a cavity for receiving the electrically insulating material 20, which is intended to prevent an electrical flashover between the Varistor ground stresses 1 and the second electrical contact 15 in this embodiment.
- the entire assembly may be provided with a cover 50B which closes the component.
- the Varistor ground stresses 1 is contacted by the first electrical contact 5.
- This alternative embodiment exhibits similar overheating characteristics and similar current drainage capabilities as the two ceramic body embodiment.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
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- Fuses (AREA)
- Thermistors And Varistors (AREA)
- Insulators (AREA)
- Ceramic Capacitors (AREA)
Abstract
Description
Die Erfindung betrifft ein elektrokeramisches Bauelement mit einer Temperatursicherung.The invention relates to an electroceramic device with a thermal fuse.
Zu derartigen Bauelementen gehören zum Beispiel Varistoren. Der Grundkörper solcher bekannter Bauelemente ist häufig aus einer Mischung verschiedener Metalloxide, zum Beispiel auf der Basis von Zinkoxid hergestellt. Varistoren weisen eine nicht-lineare spannungsabhängige Widerstandsänderung auf, die zum Schutz eines elektrischen Schaltkreises vor Überspannung benutzt wird. Der Widerstandswert von Varistoren sinkt dabei mit steigender anliegender Spannung.Such devices include, for example, varistors. The main body of such known components is often made of a mixture of different metal oxides, for example based on zinc oxide. Varistors have a non-linear voltage-dependent resistance change used to protect an electrical circuit from overvoltage. The resistance of varistors decreases with increasing applied voltage.
Beim Auftreten einer Überspannung (Betriebsspannung übersteigt einen zulässigen Grenzwert für den Varistor) steigt der Durchlaßstrom des Varistors steil an. Die dadurch ebenfalls stark zunehmende Verlustleistung heizt den Varistor auf. Bei länger andauernden Überspannungen kann es dabei zur Überhitzung und zur Brandauslösung kommen.When an overvoltage occurs (operating voltage exceeds a permissible limit value for the varistor), the forward current of the varistor rises steeply. The power loss, which also increases strongly, heats up the varistor. Prolonged overvoltages may cause overheating and fire.
Aus der Druckschrift DE 331 85 88 ist ein Varistorsicherungselement zum Schutz elektrischer Schaltkreise vor Überspannungen und Übertemperaturen bekannt. Es besteht aus einer mechanischen Konstruktion, bei der auf dem Varistor ein niedrigschmelzendes Lot aufgebracht ist, das eine federnde Stromzuleitung fixiert. Beim Auftreten von Überspannungen und damit verbundener Überhitzung des Varistors schmilzt das Lot, wobei die Federkonstruktion daraufhin eine irreversible niederohmige Kurzschlußüberbrückung mit einer zweiten Stromzuleitung herstellt. Dabei vergrößert die Federkonstruktion auch die Distanz zwischen der federnden Stromzuleitung und dem Varistor, um einen elektrischen Überschlag zu verhindern. Die Nachteile dieser mechanischen Konstruktion bestehen darin, daß sie nur sehr aufwendig zu realisieren ist.From the document DE 331 85 88 a Varistorsicherungselement for the protection of electrical circuits against overvoltages and excess temperatures is known. It consists of a mechanical construction in which a low-melting solder is applied to the varistor, which fixes a resilient power supply line. Upon the occurrence of overvoltages and the associated overheating of the varistor, the solder melts, the spring construction subsequently producing an irreversible low-resistance short-circuit bridging with a second current feed line. The spring construction also increases the distance between the resilient power supply line and the varistor to prevent electrical flashover. The disadvantages of this mechanical construction are that it is very difficult to implement.
In der Druckschrift JP 04 151 804 A ist eine in einem Varistorgehäuse integrierte Temperatursicherung offenbart, die über eine elektrische Leitung mit einer inneren Elektrode des Varistors verbunden ist. Die Temperatursicherung ist dabei von einem Material umgeben, das eine Wärmeleitung zwischen dem Varistor und der Temperatursicherung erlaubt. Im Falle einer Überhitzung des Varistors infolge von länger andauernder Überspannung kann somit die Wärme des Varistors auf die Temperatursicherung übertragen und diese ausgelöst werden. Der Nachteil dieser Konstruktion besteht darin, daß die Temperatursicherung nicht im direktem thermischen Kontakt mit dem Varistor steht und deshalb aufgrund von Verlusten während der Wärmeübertragung erst bei höheren Temperaturen ausgelöst wird.Publication JP 04 151 804 A discloses a temperature fuse integrated in a varistor housing, which is connected via an electrical line to an inner electrode of the varistor. The temperature fuse is surrounded by a material that allows heat conduction between the varistor and the temperature fuse. In the event of overheating of the varistor as a result of prolonged overvoltage, the heat of the varistor can thus be transferred to the temperature fuse and triggered. The disadvantage of this design is that the thermal fuse is not in direct thermal contact with the varistor and therefore due to losses during heat transfer is triggered only at higher temperatures.
Der Erfindung liegt deshalb die Aufgabe zugrunde, eine einfache thermische Sicherung für elektrokeramische Bauelemente zur Verfügung zu stellen, die die genannten Nachteile vermeidet.The invention is therefore based on the object to provide a simple thermal fuse for electroceramic devices available, which avoids the disadvantages mentioned.
Die Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand weiterer Ansprüche.The object is solved by the features of claim 1. Advantageous embodiments of the invention are the subject of further claims.
Die Erfindung beschreibt ein elektrokeramisches Bauelement mit wenigstens einem ersten keramischen Grundkörper. Im normalen Betriebsfall, bei dem die Betriebsspannung einen vorgegebenen zulässigen Grenzwert nicht überschreitet, erfolgt ein Stromfluß zwischen zwei elektrischen Kontakten über den ersten keramischen Grundkörper und ein elektrisches Leiterstück. Der erste keramische Grundkörper kontaktiert das elektrische Leiterstück und steht deshalb im direkten Wärmekontakt mit ihm. Bei Überschreitung der Betriebsspannung heizt sich der erste keramische Grundkörper infolge der zunehmenden Verlustleistung stark auf, so daß auch das elektrische Leiterstück aufgeheizt wird. Es ist dabei so ausgeführt, daß es ab einer bestimmten Temperatur schmilzt und somit den Stromfluß unterbricht. Ein elektrisch isolierendes Material verhindert einen elektrischen Überschlag zwischen den elektrisch leitenden Bereichen, die von dem elektrischen Leiterstück kontaktiert wurden und gewährleistet so eine zuverlässige Unterbrechung des Strompfades.The invention describes an electroceramic component having at least one first ceramic base body. In normal operation, in which the operating voltage does not exceed a predetermined allowable limit, there is a current flow between two electrical contacts on the first ceramic body and an electrical conductor piece. The first ceramic base body contacts the electrical conductor piece and is therefore in direct thermal contact with it. When the operating voltage is exceeded, the first ceramic base body heats up greatly due to the increasing power loss, so that the electrical conductor piece is heated. It is designed so that it from a certain temperature melts and thus interrupts the flow of current. An electrically insulating material prevents electrical flashover between the electrically conductive regions that have been contacted by the electrical conductor piece, thus ensuring a reliable interruption of the current path.
Die Vorteile der Erfindung gegenüber dem Stand der Technik bestehen darin, daß das elektrische Leiterstück erfindungsgemäß im direkten Wärmekontakt mit dem ersten keramischen Grundkörper steht. Aus diesem Grunde muß keine mit Verlusten behaftete Wärmeübertragung durch eine Ummantelung des ersten keramischen Grundkörpers stattfinden. Die Übertemperatursicherung kann deshalb bereits bei niedrigeren Temperaturen am ersten Grundkörper ausgelöst werden und ist somit wesentlich empfindlicher als herkömmliche Sicherungen. Ein weiterer Vorteil ergibt sich daraus, daß nach dem Schmelzen des elektrischen Leiterstücks ein elektrischer Überschlag erfindungsgemäß in einfacher Weise durch das elektrisch isolierende Material verhindert werden kann. Es sind keine aufwendigen mechanischen Federkonstruktionen nötig, um die Kontakte nach dem Schmelzen des elektrischen Leiterstücks auseinander zu bewegen.The advantages of the invention over the prior art are that the electrical conductor piece according to the invention is in direct thermal contact with the first ceramic body. For this reason, no loss of heat transfer must take place through a sheath of the first ceramic body. The overtemperature protection can therefore be triggered at lower temperatures on the first body and is thus much more sensitive than conventional fuses. Another advantage results from the fact that after the melting of the electrical conductor piece, an electrical flashover according to the invention can be prevented in a simple manner by the electrically insulating material. There are no complicated mechanical spring structures needed to move the contacts apart after melting the electrical conductor piece.
Der erste Grundkörper kann beispielsweise eine Varistorkeramik auf der Basis von Zinkoxid enthalten. Das elektrische Leiterstück ist vorteilhafterweise ein niedrigschmelzendes Lot, beispielsweise mit einem Schmelzpunkt zwischen etwa 80°C und 180°C. Als elektrisch isolierendes Material lassen sich beispielsweise riesel- oder fließfähige Materialien wie Quarzsand oder Glaskugeln einsetzen.The first base body may contain, for example, a varistor ceramic based on zinc oxide. The electrical conductor piece is advantageously a low-melting solder, for example with a melting point between about 80 ° C and 180 ° C. For example, free-flowing or flowable materials such as quartz sand or glass beads can be used as the electrically insulating material.
Dies hat den Vorteil, daß nach dem Schmelzen des elektrischen Leiterstücks, dem Lot, das riesel- oder fließfähige Material in das flüssige Metall eindringen kann und so zuverlässig die Ausbildung eines Lichtbogens und damit eines elektrischen Überschlags verhindert wird.This has the advantage that after melting of the electrical conductor piece, the solder, the free-flowing or flowable material can penetrate into the liquid metal and so reliable the formation of an arc and thus an electrical flashover is prevented.
Vorteilhafterweise kann eine Verkapselung, beispielsweise aus temperaturbeständigem Kunstoff wie Polyphenylensulfid (PPS) vorgesehen sein, die ein Behältnis für das isolierende riesel- oder fließfähige Material schafft und dabei gleichzeitig die mechanische Stabilität des Bauelements erhöht.Advantageously, an encapsulation, for example made of temperature-resistant plastic such as polyphenylene sulfide (PPS) can be provided, which creates a container for the insulating free-flowing or flowable material and at the same time increases the mechanical stability of the device.
Das gesamte elektrokeramische Bauelement mit der integrierten Temperatursicherung und der Verkapselung kann vorteilhafterweise von einem einzigen Gehäuse umhüllt werden. Dadurch entsteht ein kompaktes Bauelement mit verringertem Platzbedarf.The entire electroceramic device with the integrated thermal fuse and the encapsulation can advantageously be enveloped by a single housing. This creates a compact device with reduced space requirements.
Im folgenden soll die Erfindung anhand von Abbildungen aus Ausführungsbeispielen näher erläutert werden.
Figuren 1A und 1B- zeigen einen erfindungsgemäßen Varistor mit integrierter Temperatursicherung mit zwei keramischen Grundkörpern in der Aufsicht und im Querschnitt.
- Figuren 2A und 2B
- zeigen einen erfindungsgemäßen Varistor mit nur einem keramischen Grundkörper in der Aufsicht und im Querschnitt.
- Figures 1A and 1B
- show a varistor according to the invention with integrated thermal fuse with two ceramic bodies in the plan and in cross section.
- FIGS. 2A and 2B
- show a varistor according to the invention with only one ceramic body in the plan view and in cross section.
In den Figuren 1A und 1B ist eine Serienschaltung von zwei Varistorgrundkörpern 1 und 30 mit jeweils etwa 60 beziehungsweise 75 V Betriebsspannung zu sehen, so daß sich eine Betriebsspannung von etwa 130 V gesamt realisieren läßt. Die beiden Varistorgrundkörper 1 und 30 sind durch das elektrische Leiterstück 10, ein niedrigschmelzendes Lot mit einem Schmelzpunkt von etwa 80°C bis 180°C, elektrisch leitend miteinander verbunden. Das elektrisch isolierende Material 20 kann vorteilhafterweise als Quarzsand ausgeführt werden, der zwischen den beiden Varistorgrundkörpern angeordnet ist und das Lot 10 umgibt. Als elektrische Kontakte 5 und 15 können beispielsweise verzinnte Kupferdrähte dienen. Ein Kunststoffring 50, vorteilhafterweise aus einem temperaturbeständigem Kunststoff wie Polyphenylensulfid(PPS) schafft zusammen mit den beiden keramischen Grundkörpern 1 und 30 als Deckel einen Hohleraum für das isolierende Material 20. Verschlossen werden kann der Hohlraum durch einen Stopfen 50A. Zur Verhinderung von Außenüberschlägen kann das gesamte Bauelemente mit integrierter Temperatursicherung vorteilhafterweise von einem Gehäuse 45 umgeben werden, das beispielsweise aus Epoxidkunststoff besteht.FIGS. 1A and 1B show a series connection of two varistor
Bei starker Überspannung schmilzt das elektrische Leiterstück 10 des Bauelements zuverlässig innerhalb weniger Sekunden. Zum Zeitpunkt der Auslösung der Temperatursicherung beträgt die Temperatur am Gehäuse des Bauelements nur etwa 120°C. Dadurch ist gewährleistet, daß das Bauelement nicht zu brennen beginnt und auch keine Gegenstände in seiner Umgebung in Brand setzt. Gleichzeitig können durch die Verwendung eines etwa 1 mm dicken Lotdrahtes Stromstöße von etwa 8000 A (Impulsform 8/20 µs) ausgehalten werden. Das heißt, daß durch die erfindungsgemäße Übertemperatursicherung keine Einbußen beim Stromableitvermögen in Kauf genommen werden müssen.At high overvoltage, the
Zur Modifizierung der elektrischen Eigenschaften des erfindungsgemäßen Varistors, ist es auch möglich, zwei unterschiedliche Varistormaterialien 1 und 30 einzusetzen, beispielsweise auf der Basis von SiC.In order to modify the electrical properties of the varistor according to the invention, it is also possible to use two
Die Ausführungsform mit den zwei keramischen Grundkörpern hat darüber hinaus den Vorteil, daß eine räumliche Trennung der elektrischen Kontakte 5 und 15 von dem elektrischen Leiterstück 10 möglich ist. Das elektrische Leiterstück befindet sich im Zwischenraum 35 zwischen den beiden Varistorgrundkörpern, während die elektrischen Kontakte jeweils die dem Zwischenraum abgewandten Seiten 1A, 30A der Varistorgrundkörper kontaktieren. Dadurch läßt sich eine gute thermische Abschirmung des elektrischen Leiterstücks von den elektrischen Kontakten gewährleisten, so daß eine hohe Lötwärmebeständigkeit gegeben ist. Dadurch ist im Gegensatz zu vielen herkömmlichen Temperatursicherungen ein problemloses Anlöten beziehungsweise Anschweißen der elektrischen Kontakte möglich, ohne die Temperatursicherung auszulösen.The embodiment with the two ceramic bodies also has the advantage that a spatial separation of the
Figur 2A zeigt eine Aufsicht und Figur 2B einen Querschnitt durch einen erfindungsgemäßen Varistor mit nur einem Varistorgrundkörper 1. In diesem Falle ist das elektrische Leiterstück 10 direkt mit dem zweiten elektrischen Kontakt 15 und dem Varistorgrundkörper 1 verbunden. Ein vorteilhafterweise als Kunststoff ausgeführter Ring 50 schafft einen Hohlraum zur Aufnahme des elektrisch isolierenden Materials 20, das bei dieser Ausführung einen elektrischen Überschlag zwischen dem Varistorgrundkörper 1 und dem zweiten elektrischen Kontakt 15 verhindern soll. Die gesamte Anordnung kann mit einer Abdeckung 50B versehen werden, die das Bauteil verschließt. Weiterhin wird der Varistorgrundkörper 1 von dem ersten elektrischen Kontakt 5 kontaktiert.FIG. 2A shows a plan view and FIG. 2B shows a cross section through a varistor according to the invention with only one varistor base body 1. In this case, the
Diese alternative Ausführungsform zeigt ähnliche Eigenschaften im Falle einer Überhitzung und ähnliches Stromableitvermögen wie die Ausführungsform mit zwei keramischen Grundkörpern.This alternative embodiment exhibits similar overheating characteristics and similar current drainage capabilities as the two ceramic body embodiment.
Die Erfindung ist nicht auf die konkret beschriebenen Ausführungsbeispiele beschränkt. Im Rahmen der Erfindung liegen selbstverständlich auch weitere Variationen insbesondere bezüglich der Anzahl der verwendeten keramischen Grundkörper, ihrer Anordnung zueinander und die Art der verwendeten Keramikmaterialien. The invention is not limited to the specific embodiments described. In the context of the invention, of course, other variations in particular with respect to the number of ceramic base body used, their arrangement to each other and the nature of the ceramic materials used.
Claims (13)
- Electrical component with a fuse against overvoltages,- having at least one first ceramic base body (1),- characterized in that a current path which extends over the first ceramic base body (1) and an electrical conductor piece (10) touching the first ceramic base body, which is in direct thermal contact with the first ceramic base body, is defined between a first electrical contact (5) on the ceramic base body (1) and a second electrical contact (15),- wherein the electrical conductor piece (10) is designed so that it melts owing to heating of the first base body when the intended operating voltage of the component is exceeded,- wherein a mobile or flowable electrically insulating material (20), which can penetrate into the electrical conductor piece (10) when it melts, is arranged enclosing the electrical conductor piece (10) so that electrical sparkover is prevented between the regions of the current path which were bridged by the electrical conductor piece (10),- having an encapsulation (50) for encasing the component.
- Electrical component according to the preceding claim,- characterized in that the electrical conductor piece (10) is connected to the second electrical contact (15),- characterized in that the electrically insulating material (20) is arranged between the first ceramic base body (1) and the second electrical contact (15).
- Electrical component according to Claim 1,- characterized in that the electrical conductor piece (10) electrically connects the first base body (1) conductively to a second base body (30),- characterized in that the first contact (5) is arranged directly on the first base body (1) and the second contact (15) is arranged directly on the second base body (30),- characterized in that the electrically insulating material (20) is arranged between the first and second base bodies.
- Electrical component according to the preceding claim,- characterized in that the electrical conductor piece (10) is thermally isolated from the electrical contacts (5, 15) owing to spatial separation.
- Electrical component according to the preceding claim,- characterized in that the two base bodies (1, 30) are stacked on each other,- characterized in that the electrical conductor piece (10) is arranged in the intermediate space (35) between the two base bodies (1, 30),- when the electrical contacts (5, 15) respectively touch the sides (1A, 30A) of the base bodies (1, 30) facing away from the intermediate space (35).
- Electrical component according to one of the preceding claims,- characterized in that the encapsulation (50) constitutes and closes a cavity for holding the insulating material (20).
- Electrical component according to the preceding claim,- characterized in that the encapsulation (50) is thermally stable.
- Electrical component according to one of the preceding claims,- characterized in that a housing (45) is applied which encloses the base bodies (1 or 1, 30), the electrical conductor piece (10), the electrically insulating material (20) with the encapsulation (50) and at least partially the electrical contacts (5, 15).
- Electrical component according to one of the preceding claims,- characterized in that the base bodies (1 or 1, 30) comprise a varistor ceramic.
- Electrical component according to one of the preceding claims,- characterized in that the base bodies (1 or 1, 30) comprise a varistor ceramic based on ZnO.
- Electrical component according to one of the preceding claims,- characterized in that the electrically insulating material (20) is quartz sand or glass beads.
- Electrical component according to one of the preceding claims,- characterized in that the electrical conductor piece (10) is a solder.
- Electrical component according to one of the preceding claims,- characterized in that the electrical conductor piece (10) is a solder with a melting point of between about 80°C and 180°C.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10137873 | 2001-08-02 | ||
| DE10137873A DE10137873C1 (en) | 2001-08-02 | 2001-08-02 | Electroceramic component with fuse provided by conductor piece melted upon application of overvoltage |
| PCT/DE2002/002457 WO2003017292A2 (en) | 2001-08-02 | 2002-07-04 | Electroceramic component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1412953A2 EP1412953A2 (en) | 2004-04-28 |
| EP1412953B1 true EP1412953B1 (en) | 2006-09-13 |
Family
ID=7694113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02754320A Expired - Lifetime EP1412953B1 (en) | 2001-08-02 | 2002-07-04 | Electroceramic component |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7728709B2 (en) |
| EP (1) | EP1412953B1 (en) |
| JP (1) | JP2004538658A (en) |
| AT (1) | ATE339768T1 (en) |
| DE (2) | DE10137873C1 (en) |
| TW (1) | TW569244B (en) |
| WO (1) | WO2003017292A2 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005024347B8 (en) * | 2005-05-27 | 2010-07-08 | Infineon Technologies Ag | Electrical component with fused power supply connection |
| DE102005024321B8 (en) | 2005-05-27 | 2012-10-04 | Infineon Technologies Ag | protection circuit |
| DE102005024346B4 (en) | 2005-05-27 | 2012-04-26 | Infineon Technologies Ag | Fuse element with trigger support |
| RU2412496C2 (en) * | 2005-08-05 | 2011-02-20 | Кива Спол. С Р.О. | Overvoltage protection device with state alarm |
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-
2001
- 2001-08-02 DE DE10137873A patent/DE10137873C1/en not_active Expired - Fee Related
-
2002
- 2002-07-03 TW TW091114742A patent/TW569244B/en active
- 2002-07-04 JP JP2003522110A patent/JP2004538658A/en active Pending
- 2002-07-04 DE DE50208156T patent/DE50208156D1/en not_active Expired - Lifetime
- 2002-07-04 AT AT02754320T patent/ATE339768T1/en not_active IP Right Cessation
- 2002-07-04 US US10/485,166 patent/US7728709B2/en not_active Expired - Fee Related
- 2002-07-04 EP EP02754320A patent/EP1412953B1/en not_active Expired - Lifetime
- 2002-07-04 WO PCT/DE2002/002457 patent/WO2003017292A2/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| WO2003017292A3 (en) | 2003-12-11 |
| WO2003017292A2 (en) | 2003-02-27 |
| US20040264092A1 (en) | 2004-12-30 |
| JP2004538658A (en) | 2004-12-24 |
| DE10137873C1 (en) | 2002-10-17 |
| ATE339768T1 (en) | 2006-10-15 |
| US7728709B2 (en) | 2010-06-01 |
| TW569244B (en) | 2004-01-01 |
| EP1412953A2 (en) | 2004-04-28 |
| DE50208156D1 (en) | 2006-10-26 |
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