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US 11,257,650 B2Granted
Three phase surge protection device
AssigneeTDK Electronics Co., Ltd.
InventorsHua Qiu, Xiaojia Tian, Zhouquan He, Wen Yang
Life of this patent
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Abstract
A three phase surge protection device is disclosed. In an embodiment a device include a stack comprising a first varistor, a second varistor and a third varistor, wherein the varistors are electrically connected to form a circuit and a first thermal disconnect configured to interrupt the circuit when a temperature of the first thermal disconnect exceeds a predefined temperature.
Claims12
A three phase surge protection device comprising:
- a stack comprising a first varistor, a second varistor and a third varistor, wherein the varistors are electrically connected to form a circuit;
- and
- a first thermal disconnect configured to interrupt the circuit when a temperature of the first thermal disconnect exceeds a predefined temperature,
- wherein the first thermal disconnect comprises a first spring member and a first slider,
- wherein the first spring member is soldered to a first terminal of the stack by a low temperature solder joint,
- wherein the first thermal disconnect is configured such that the first slider abuts a first abutment face of the first spring member when the first spring member is fixed to the first terminal of the stack by the low temperature solder joint such that the first slider does not apply pressure to the low temperature solder joint, and
- wherein the first abutment face of the first spring member is perpendicular to the low temperature solder joint when the low temperature solder joint is closed.
4 more elements
Dependencies are inferred from the claim text.