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JP2024039224A - Surge protective element - Google Patents

Surge protective element Download PDF

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JP2024039224A
JP2024039224A JP2022143616A JP2022143616A JP2024039224A JP 2024039224 A JP2024039224 A JP 2024039224A JP 2022143616 A JP2022143616 A JP 2022143616A JP 2022143616 A JP2022143616 A JP 2022143616A JP 2024039224 A JP2024039224 A JP 2024039224A
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insulating tube
surge protection
protection element
auxiliary part
discharge
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雅樹 野本
Masaki Nomoto
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Mitsubishi Materials Corp
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Mitsubishi Materials Corp
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Abstract

To provide a surge protective element which can further improve performance of discharging electrons from a charge supporting unit.SOLUTION: The present invention includes: an insulating tube 2; a pair of sealing electrodes 3 for confining discharge control gas in the inside by blocking openings at both ends of the insulating tube; a discharge supporting unit 4 formed of an electronic source material in an inner peripheral surface of the insulating tube; and an outer peripheral surface conductor unit 5 formed of a conductor in a part which faces the discharge supporting unit in an outer peripheral surface of the insulating tube. It is more desirable that the present invention includes an insulating coating film formed over the outer peripheral surface conductor unit in the outer peripheral surface of the insulating tube.SELECTED DRAWING: Figure 1

Description

本発明は、落雷等で発生するサージから様々な機器を保護し、事故を未然に防ぐのに使用するサージ防護素子に関する。 TECHNICAL FIELD The present invention relates to a surge protection element used to protect various devices from surges caused by lightning strikes and to prevent accidents.

電話機、ファクシミリ、モデム等の通信機器用の電子機器が通信線との接続する部分、電源線、アンテナ或いはCRT、液晶テレビおよびプラズマテレビ等の画像表示駆動回路等、雷サージや静電気等の異常電圧(サージ電圧)による電撃を受けやすい部分には、異常電圧によって電子機器やこの機器を搭載するプリント基板の熱的損傷又は発火等による破壊を防止するために、サージ防護素子が接続されている。 Abnormal voltages such as lightning surges and static electricity in parts where electronic devices for communication devices such as telephones, facsimiles, and modems connect with communication lines, power lines, antennas or CRTs, image display drive circuits such as LCD TVs and plasma TVs, etc. Surge protection elements are connected to parts that are susceptible to electric shocks due to surge voltage (surge voltage) in order to prevent electronic equipment and the printed circuit board on which this equipment is mounted from being destroyed by thermal damage or ignition due to abnormal voltage.

従来、例えば特許文献1に示すように、一対の封止電極から対向状態に突出した一対の突出電極部を備え、絶縁性管の内面に放電補助部が形成されたアレスタ型のサージ防護素子が記載されている。
このようなアレスタ型のサージ防護素子は、碍子である絶縁性管の内壁に放電補助部としてカーボントリガ線を形成し、不活性ガスを満たした状態で対向した一対の封止電極を絶縁性管にロウ付けして作製される。
Conventionally, as shown in Patent Document 1, for example, an arrester-type surge protection element has been provided with a pair of protruding electrode parts protruding from a pair of sealing electrodes in a facing state, and a discharge auxiliary part is formed on the inner surface of an insulating tube. Are listed.
Such an arrester-type surge protection element has a carbon trigger wire formed as a discharge auxiliary part on the inner wall of an insulating tube, and a pair of sealed electrodes facing each other are connected to the insulating tube while being filled with an inert gas. It is made by brazing.

このサージ防護素子は、放電開始電圧を決定する主電極の封止電極の他に、回路の保護性能を向上させるため(電圧上昇速度に対する追随性)に、絶縁性管の内壁に補助的にカーボンの放電補助部を形成している。カーボンの放電補助部は、グラファイトを構成成分として有し、グラファイトのナノ構造が先端の鋭利な電極として機能することで、見かけ上、低仕事関数化して他の導体にはない電子放出性能を実現している電子源である。 In addition to the sealing electrode of the main electrode that determines the discharge starting voltage, this surge protection element also uses carbon fiber on the inner wall of the insulating tube to improve circuit protection performance (ability to follow voltage rise speed). It forms the discharge auxiliary part. The carbon discharge auxiliary part has graphite as a component, and the nanostructure of graphite functions as a sharp electrode, giving it an apparent low work function and achieving electron emission performance not found in other conductors. It is an electron source with

特開2017-54586号公報Unexamined Japanese Patent Publication No. 2017-54586

上記従来の技術には、以下の課題が残されている。
すなわち、従来のサージ防護素子では、放電補助部により回路の保護性能を向上させているが、放電補助部からの電子放出性能をさらに向上させて、電圧上昇速度に対する追随性をより高めることが要望されている。
The above conventional techniques still have the following problems.
In other words, in conventional surge protection elements, the protection performance of the circuit is improved by the discharge auxiliary part, but it is desired to further improve the electron emission performance from the discharge auxiliary part to further improve the ability to follow the voltage rise speed. has been done.

本発明は、前述の課題に鑑みてなされたもので、放電補助部からの電子放出性能をさらに向上させることができるサージ防護素子を提供することを目的とする。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a surge protection element that can further improve the electron emission performance from the discharge auxiliary part.

本発明は、前記課題を解決するために以下の構成を採用した。すなわち、第1の発明に係るサージ防護素子は、絶縁性管と、前記絶縁性管の両端開口部を閉塞して内部に放電制御ガスを封止する一対の封止電極と、前記絶縁性管の内周面に電子源材料で形成された放電補助部と、前記絶縁性管の外周面の前記放電補助部と対向した部分に導体で形成され外周面導体部とを備えていることを特徴とする。 The present invention employs the following configuration to solve the above problems. That is, the surge protection element according to the first invention includes an insulating tube, a pair of sealing electrodes that close openings at both ends of the insulating tube to seal discharge control gas therein, and the insulating tube. A discharge auxiliary part formed of an electron source material on an inner peripheral surface of the insulating tube, and an outer peripheral surface conductor part formed of a conductor at a portion of the outer peripheral surface of the insulating tube facing the discharge auxiliary part. shall be.

このサージ防護素子では、絶縁性管の外周面の放電補助部と対向した部分に導体で形成され外周面導体部を備えているので、放電補助部と外周面導体部とが絶縁性管を挟んでコンデンサ的に構成されることで互いに静電結合し、放電補助部に電荷が誘起され、電圧が高くなって封止電極との間で電界が強くなり、電子が出易くなって電圧上昇速度に対する追随性が向上する。 This surge protection element has an outer circumferential surface conductor section formed of a conductor on the outer circumferential surface of the insulating tube facing the discharge auxiliary section, so that the discharge auxiliary section and the outer circumferential surface conductor section sandwich the insulating tube. By being configured like a capacitor, they are electrostatically coupled to each other, a charge is induced in the discharge auxiliary part, the voltage increases, the electric field becomes stronger between the sealing electrode, electrons are more likely to come out, and the voltage rises faster. Improves followability.

第2の発明に係るサージ防護素子は、第1の発明において、前記放電補助部が、前記一対の封止電極の一方側に形成された一方側補助部と、記一方側補助部から離間して配されていると共に前記一対の封止電極の他方側に形成された他方側補助部とを備え、前記外周面導体部が、前記一方側補助部に対向した部分と前記他方側補助部に対向した部分とを架け渡して形成されていることを特徴とする。
すなわち、このサージ防護素子では、外周面導体部が、一方側補助部に対向した部分と他方側補助部に対向した部分とを架け渡して形成されているので、一方側補助部と他方側補助部とで互いに逆の電荷が誘起され、どちらかがマイナス側となり、電子が放出される。
In the surge protection element according to a second invention, in the first invention, the discharge auxiliary part is spaced from a one-side auxiliary part formed on one side of the pair of sealing electrodes and the one-side auxiliary part. and an auxiliary part on the other side formed on the other side of the pair of sealing electrodes, and the outer peripheral surface conductor part is arranged between a part facing the auxiliary part on the one side and the auxiliary part on the other side. It is characterized by being formed by spanning opposing parts.
In other words, in this surge protection element, the outer peripheral surface conductor section is formed by bridging the part facing the auxiliary part on one side and the part facing the auxiliary part on the other side. Opposite charges are induced between the two parts, one of which becomes negative, and electrons are emitted.

第3の発明に係るサージ防護素子は、第1又は第2の発明において、前記外周面導体部を覆って前記絶縁性管の外周面に形成された絶縁性被膜を備えていることを特徴とする。
すなわち、このサージ防護素子では、外周面導体部を覆って絶縁性管の外周面に形成された絶縁性被膜を備えているので、実装された際に回路基板等との絶縁を確実に図ることができる。
The surge protection element according to a third invention is characterized in that, in the first or second invention, an insulating coating is formed on the outer peripheral surface of the insulating tube to cover the outer peripheral surface conductor part. do.
In other words, this surge protection element has an insulating film formed on the outer circumferential surface of the insulating tube to cover the outer circumferential surface conductor part, so when it is mounted, it is possible to ensure insulation from the circuit board, etc. I can do it.

第4の発明に係るサージ防護素子は、第1又は第2の発明において、前記放電補助部が、前記封止電極の外周面に対向した部分に配置されていることを特徴とする。
すなわち、このサージ防護素子では、放電補助部が、封止電極の外周面に対向した部分に配置されているので、一対の封止電極の先端面間で生じた放電の影響を受け難く、放電補助部が放電による熱やスパッタリングで劣化することを抑制可能である。
A surge protection element according to a fourth invention is characterized in that, in the first or second invention, the discharge auxiliary part is arranged in a portion facing the outer peripheral surface of the sealing electrode.
In other words, in this surge protection element, the discharge auxiliary part is arranged in a portion facing the outer circumferential surface of the sealing electrode, so that it is less affected by the discharge that occurs between the tip surfaces of the pair of sealing electrodes, and the discharge auxiliary part is It is possible to suppress deterioration of the auxiliary part due to heat caused by discharge and sputtering.

本発明によれば、以下の効果を奏する。
すなわち、本発明に係るサージ防護素子によれば、絶縁性管の外周面の放電補助部と対向した部分に導体で形成され外周面導体部を備えているので、放電補助部と外周導電体とが絶縁性管を挟んでコンデンサ的に構成されることで互いに静電結合し、放電補助部に電荷が誘起され、電子が出易くなって電圧上昇速度に対する追随性が向上する。
According to the present invention, the following effects are achieved.
That is, according to the surge protection element according to the present invention, since the outer circumferential surface conductor portion formed of a conductor is provided on the portion of the outer circumferential surface of the insulating tube facing the discharge auxiliary portion, the discharge auxiliary portion and the outer circumferential conductor are provided. By being configured like a capacitor with an insulating tube in between, they are electrostatically coupled to each other, and charges are induced in the discharge auxiliary part, making it easier for electrons to come out and improving the ability to follow the voltage increase rate.

本発明に係るサージ防護素子の第1実施形態を示す軸方向の断面図である。FIG. 1 is an axial cross-sectional view showing a first embodiment of a surge protection element according to the present invention. 本発明に係るサージ防護素子の第2実施形態を示す軸方向の断面図である。FIG. 3 is an axial cross-sectional view showing a second embodiment of the surge protection element according to the present invention.

以下、本発明に係るサージ防護素子の第1実施形態を、図1を参照しながら説明する。なお、以下の説明に用いる図面では、各部材を認識可能又は認識容易な大きさとするために縮尺を適宜変更している。 EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment of the surge protection element based on this invention is described with reference to FIG. Note that in the drawings used in the following explanation, the scale is changed as appropriate to make each member recognizable or easily recognizable.

本実施形態のサージ防護素子1は、図1に示すように、絶縁性管2と、絶縁性管2の両端開口部を閉塞して内部に放電制御ガスを封止する一対の封止電極3と、絶縁性管2の内周面に電子源材料で形成された放電補助部4と、絶縁性管2の外周面の放電補助部4と対向した部分に導体で形成され外周面導体部5とを備えている。 As shown in FIG. 1, the surge protection element 1 of this embodiment includes an insulating tube 2 and a pair of sealing electrodes 3 that close the openings at both ends of the insulating tube 2 to seal discharge control gas inside. , a discharge auxiliary part 4 formed of an electron source material on the inner peripheral surface of the insulating tube 2, and an outer peripheral surface conductor part 5 formed of a conductor on a part of the outer peripheral surface of the insulating tube 2 facing the discharge auxiliary part 4. It is equipped with

上記放電補助部4は、一対の封止電極3の一方側に形成された一方側補助部4aと、一方側補助部4aから離間して配されていると共に一対の封止電極3の他方側に形成された他方側補助部4bとを備えている。
上記外周面導体部5は、一方側補助部4aに対向した部分と他方側補助部4bに対向した部分とを架け渡して形成されている。
The discharge auxiliary part 4 includes a one-side auxiliary part 4a formed on one side of the pair of sealing electrodes 3, and a one-side auxiliary part 4a that is spaced apart from the one-side auxiliary part 4a and on the other side of the pair of sealing electrodes 3. The other side auxiliary part 4b is formed in the other side auxiliary part 4b.
The outer peripheral surface conductor portion 5 is formed by spanning a portion facing the one side auxiliary portion 4a and a portion facing the other side auxiliary portion 4b.

一方側補助部4aと他方側補助部4bとは、電子を放出可能な電子源、例えば絶縁性管2の軸線を中心とした円環状に炭素材で形成された導電性材料であって、いわゆるカーボントリガ線である。
また、上記放電補助部4(一方側補助部4a及び他方側補助部4b)は、封止電極3の外周面に対向した部分に配置されている。すなわち、放電補助部4は、一対の封止電極3の先端面間に対向した部分には配置されていない。
The one side auxiliary part 4a and the other side auxiliary part 4b are an electron source capable of emitting electrons, for example, a conductive material formed of a carbon material in an annular shape centered on the axis of the insulating tube 2, and are so-called. It is a carbon trigger wire.
Further, the discharge auxiliary portion 4 (one side auxiliary portion 4a and the other side auxiliary portion 4b) is arranged at a portion facing the outer circumferential surface of the sealing electrode 3. That is, the discharge auxiliary part 4 is not disposed in a portion facing between the tip surfaces of the pair of sealing electrodes 3.

上記外周面導体部5は、例えば炭素材,金属箔(Cu,Ag,Ni等),導電性ペースト(Agペースト等)等で形成されている。
この外周面導体部5は、一方側補助部4aに対向した部分と他方側補助部4bに対向した部分とを繋げるようにして、線状又は帯状に上下に延在している、または絶縁性管2の外周面に沿った円環帯状などに形成されている。
The outer peripheral surface conductor portion 5 is formed of, for example, a carbon material, metal foil (Cu, Ag, Ni, etc.), conductive paste (Ag paste, etc.), or the like.
This outer circumferential surface conductor portion 5 extends vertically in a linear or strip-like manner so as to connect a portion facing the one side auxiliary portion 4a and a portion facing the other side auxiliary portion 4b, or has an insulating conductor. It is formed in the shape of an annular band along the outer peripheral surface of the tube 2.

上記絶縁性管2は、例えば円筒状のアルミナ(Al)等の絶縁材料で形成されている。
上記一対の封止電極3は、内方に突出し互いに対向した一対の突出電極部3aを有している。
上記封止電極3は、例えば42アロイ(Fe:58wt%、Ni:42wt%)やCu等で構成されている。
The insulating tube 2 is made of, for example, a cylindrical insulating material such as alumina (Al 2 O 3 ).
The pair of sealing electrodes 3 have a pair of protruding electrode parts 3a that protrude inward and face each other.
The sealing electrode 3 is made of, for example, 42 alloy (Fe: 58 wt%, Ni: 42 wt%), Cu, or the like.

封止電極3は、絶縁性管2の両端開口部に導電性融着材(図示略)により加熱処理によって密着状態に固定されている円板状のフランジ部3bを有している。このフランジ部3bの内側に、内方に突出していると共に絶縁性管2の内径よりも外径の小さな円柱状の突出電極部3aが一体に設けられている。 The sealing electrode 3 has a disk-shaped flange portion 3b that is tightly fixed to the openings at both ends of the insulating tube 2 by heat treatment using a conductive fusion material (not shown). A cylindrical protruding electrode portion 3a that protrudes inward and has an outer diameter smaller than the inner diameter of the insulating tube 2 is integrally provided inside the flange portion 3b.

上記導電性融着材は、例えばAgを含むろう材としてAg-Cuろう材で形成されている。
上記絶縁性管2内に封入される放電制御ガスは、不活性ガス等であって、例えばHe,Ar,Ne,Xe,Kr,SF,CO,C,C,CF,H,大気等及びこれらの混合ガスが採用される。
The conductive fusion material is made of, for example, an Ag--Cu brazing material containing Ag.
The discharge control gas sealed in the insulating tube 2 is an inert gas, such as He, Ar, Ne, Xe, Kr, SF 6 , CO 2 , C 3 F 8 , C 2 F 6 , Gases such as CF 4 , H 2 , atmospheric air, and mixtures thereof are employed.

このように本実施形態のサージ防護素子1では、絶縁性管2の外周面の放電補助部4と対向した部分に導体で形成され外周面導体部5を備えているので、放電補助部4と外周面導体部5とが絶縁性管2を挟んでコンデンサ的に構成されることで互いに静電結合し、放電補助部4に電荷が誘起され、電圧が高くなって封止電極との間で電界が強くなり、電子が出易くなって電圧上昇速度に対する追随性が向上する。 In this way, the surge protection element 1 of the present embodiment includes the outer circumferential surface conductor portion 5 formed of a conductor on the portion of the outer circumferential surface of the insulating tube 2 that faces the discharge assisting portion 4, so that the outer circumferential surface conductor portion 5 is formed of a conductor. The outer circumferential surface conductor portion 5 is configured like a capacitor with the insulating tube 2 in between, so that they are electrostatically coupled to each other, electric charges are induced in the discharge auxiliary portion 4, and the voltage increases and the voltage between the sealing electrode and the sealing electrode increases. The electric field becomes stronger, electrons are more likely to come out, and the ability to follow the voltage increase rate improves.

また、外周面導体部5が、一方側補助部4aに対向した部分と他方側補助部4bに対向した部分とを架け渡して形成されているので、一方側補助部4aと他方側補助部4bとで互いに逆の電荷が誘起され、どちらかがマイナス側となり、電子が放出される。
例えば、図1に示すように、上側の放電補助部4を一方側補助部4aとし、下側の放電補助部4を他方補助部4bとすると、他方補助部4bがプラス(+)に誘起されると、外周面導体部5を介して一方側補助部4aがマイナス(-)に誘起され、一方側補助部4aから電子が放出され易くなる。
Further, since the outer circumferential surface conductor portion 5 is formed by bridging the portion facing the one side auxiliary portion 4a and the portion facing the other side auxiliary portion 4b, the one side auxiliary portion 4a and the other side auxiliary portion 4b are formed. Opposite charges are induced between the two, one of them becomes negative, and electrons are emitted.
For example, as shown in FIG. 1, if the upper discharge auxiliary part 4 is the one side auxiliary part 4a and the lower discharge auxiliary part 4 is the other auxiliary part 4b, the other auxiliary part 4b is induced to be positive (+). Then, the one side auxiliary part 4a is induced to be negative (-) through the outer peripheral surface conductor part 5, and electrons are more likely to be emitted from the one side auxiliary part 4a.

さらに、放電補助部4が、封止電極3の外周面に対向した部分に配置されているので、一対の封止電極3の先端面間で生じた放電の影響を受け難く、放電補助部4が放電による熱やスパッタリングで劣化することを抑制可能である。
すなわち、熱やスパッタリングの影響の著しい一対の突出電極部3a間に対向した領域を回避して放電補助部4を配置することで、保護性能の劣化を抑制することができる。
Furthermore, since the discharge auxiliary part 4 is disposed at a portion facing the outer circumferential surface of the sealing electrode 3, it is less susceptible to the influence of the discharge generated between the tip surfaces of the pair of sealing electrodes 3, and the discharge auxiliary part 4 It is possible to suppress deterioration due to heat caused by discharge and sputtering.
That is, by arranging the discharge auxiliary part 4 avoiding the area facing between the pair of protruding electrode parts 3a that is significantly affected by heat and sputtering, it is possible to suppress deterioration of the protection performance.

次に、本発明に係るサージ防護素子の第2実施形態について、図2を参照して以下に説明する。なお、以下の実施形態の説明において、上記実施形態において説明した同一の構成要素には同一の符号を付し、その説明は省略する。 Next, a second embodiment of the surge protection device according to the present invention will be described below with reference to FIG. 2. In addition, in the following description of the embodiment, the same components described in the above embodiment are given the same reference numerals, and the description thereof will be omitted.

第2実施形態と第1実施形態との異なる点は、第1実施形態では、絶縁性管2の外周面に形成された外周面導体部5が露出しているのに対し、第2実施形態のサージ防護素子21では、図2に示すように、外周面導体部5が絶縁性被膜26で覆われている点である。
すなわち、第2実施形態のサージ防護素子21は、外周面導体部5を覆って絶縁性管2の外周面に形成された絶縁性被膜26を備えている。
The difference between the second embodiment and the first embodiment is that in the first embodiment, the outer circumferential surface conductor portion 5 formed on the outer circumferential surface of the insulating tube 2 is exposed, whereas in the second embodiment In the surge protection element 21 shown in FIG. 2, the outer circumferential conductor portion 5 is covered with an insulating coating 26, as shown in FIG.
That is, the surge protection element 21 of the second embodiment includes an insulating coating 26 formed on the outer circumferential surface of the insulating tube 2 so as to cover the outer circumferential surface conductor portion 5 .

上記絶縁性被膜26は、例えばエポキシ樹脂等の絶縁性材料で形成されている。
このように第2実施形態のサージ防護素子21では、外周面導体部5を覆って絶縁性管2の外周面に形成された絶縁性被膜26を備えているので、実装された際に回路基板等との絶縁を確実に図ることができる。
The insulating film 26 is made of an insulating material such as epoxy resin.
In this way, the surge protection element 21 of the second embodiment includes the insulating coating 26 formed on the outer circumferential surface of the insulating tube 2 so as to cover the outer circumferential surface conductor portion 5, so that when mounted, the surge protection element 21 is mounted on a circuit board. It is possible to reliably insulate the

なお、本発明の技術範囲は上記各実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。 Note that the technical scope of the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention.

1,21…サージ防護素子、2…絶縁性管、3…封止電極、4…放電補助部、4a…一方側補助部、4b…他方側補助部、5…外周面導体部、26…絶縁性被膜 DESCRIPTION OF SYMBOLS 1, 21... Surge protection element, 2... Insulating tube, 3... Sealing electrode, 4... Discharge auxiliary part, 4a... One side auxiliary part, 4b... Other side auxiliary part, 5... Outer peripheral surface conductor part, 26... Insulation sex coat

Claims (4)

絶縁性管と、
前記絶縁性管の両端開口部を閉塞して内部に放電制御ガスを封止する一対の封止電極と、
前記絶縁性管の内周面に電子源材料で形成された放電補助部と、
前記絶縁性管の外周面の前記放電補助部と対向した部分に導体で形成され外周面導体部とを備えていることを特徴とするサージ防護素子。
an insulating tube;
a pair of sealing electrodes that close openings at both ends of the insulating tube to seal discharge control gas therein;
a discharge auxiliary portion formed of an electron source material on the inner peripheral surface of the insulating tube;
A surge protection element comprising: an outer circumferential surface conductor portion formed of a conductor on a portion of the outer circumferential surface of the insulating tube facing the discharge auxiliary portion.
請求項1に記載のサージ防護素子において、
前記放電補助部が、前記一対の封止電極の一方側に形成された一方側補助部と、
前記一方側補助部から離間して配されていると共に前記一対の封止電極の他方側に形成された他方側補助部とを備え、
前記外周面導体部が、前記一方側補助部に対向した部分と前記他方側補助部に対向した部分とを架け渡して形成されていることを特徴とするサージ防護素子。
The surge protection element according to claim 1,
one side auxiliary part in which the discharge auxiliary part is formed on one side of the pair of sealing electrodes;
the other side auxiliary part being spaced apart from the one side auxiliary part and formed on the other side of the pair of sealing electrodes;
A surge protection element, wherein the outer peripheral surface conductor portion is formed by spanning a portion facing the one side auxiliary portion and a portion facing the other side auxiliary portion.
請求項1又は2に記載のサージ防護素子において、
前記外周面導体部を覆って前記絶縁性管の外周面に形成された絶縁性被膜を備えていることを特徴とするサージ防護素子。
The surge protection element according to claim 1 or 2,
A surge protection element comprising an insulating coating formed on the outer circumferential surface of the insulating tube so as to cover the outer circumferential surface conductor part.
請求項1又は2に記載のサージ防護素子において、
前記放電補助部が、前記封止電極の外周面に対向した部分に配置されていることを特徴とするサージ防護素子。
The surge protection element according to claim 1 or 2,
A surge protection element, wherein the discharge auxiliary part is arranged in a portion facing the outer circumferential surface of the sealing electrode.
JP2022143616A 2022-09-09 2022-09-09 Surge protective element Pending JP2024039224A (en)

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Applications Claiming Priority (1)

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Publications (1)

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