Low-resistance high-reproducibility PTC over-current protection element

A technology for protecting components and overcurrents, applied in electrical components, resistors and circuits that respond to currents, etc., can solve the problems of abnormal rise and resistance of polymer PTC products, affecting performance, and PTC products getting wet, etc., to improve environmental reliability and performance. Effect
CN113674937APending Publication Date: 2021-11-19SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
Publication Date
2021-11-19

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Abstract

The invention relates to a low-resistance high-reproducibility PTC over-current protection element, which has a function of effectively improving the environmental reliability of a product and is a low-resistance surface-mounted polymer PTC over-current protection element mainly made of a polymer PTC composite sheet and having excellent environmental stability. The side surface of theprotection element, or the side surface and the front surface of the protection element is provided with a coating layer or a plating layer, so that the conductive composite material base layer is isolated from the external environment. The low-resistance high-reproducibility PTC over-current protection element has the following characteristics that 1, any combination surface of the four side surfaces of the element is coated with a coating layer or a plating layer, and one front surface can be coated with or not coated with the coating layer, so that the polymer PTC composite sheet of the element is isolated from the environment, and the resistance reproducibility of the product is improved; 2, the conductive holes playing a role in electrical connection are positioned on two sides of the element, so that the element has good welding performance; and 3, the structure of the existing product is not changed, and the existing assembly mode can be completely adopted.
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Description

technical field

[0001] The invention relates to an electronic component with a conductive polymer composite material as the main material, in particular to a low-resistance and high-reproducibility PTC overcurrent protection component. Background technique

[0002] PTC materials with positive temperature coefficient characteristics can maintain a low resistance value at normal temperatures, and have the characteristics of being sensitive to temperature changes, that is, when an overcurrent or overtemperature occurs in the circuit, its resistance will instantly increase to a high value. The resistance value keeps the circuit in an open circuit state to achieve the purpose of protecting circuit components. Therefore, the polymer-based conductive composite material can be connected to the circuit as a material for the current sensing element. Overcurrent protection components made of such materials have been widely used in electronic circuits.

[0003] In recent years, with t...

Claims

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