SRP120SF

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PTC resettable fuses, also known as self-recovering fuses, are positive temperature coefficient (PTC) devices that offer an efficient, economical, reliable, and safe way to protect power and electronic systems from faults and overloads. Technically, a PTC resettable fuse is more of an overtemperature protection device than a traditional fuse. It is composed of polymeric positive temperature coefficient (PPTC) thermistor material, which has the characteristic of increasing resistance when its temperature increases.

SRP120SF is a highly reliable third-generation PTC resettable fuses product developed by Shenzhen ShangYing Technology Co., Ltd. It is widely used in various consumer electronics and communications products. The rated current range is 0.25 ~ 12 A, and its trip temperature is set at 110 ℃ ± 5 ℃, the hold temperature is 100 ℃ ± 5 ℃. Moreover, the product also has a high current density, low voltage drop, quick tripping, and low heat generation.

The working principle of SRP120SF is based on the thermal characteristics of PPTC material. When the current of the protected circuit exceeds the rated value, it will generate heat due to the heat generated by the resistance, which will further increase the temperature of the polymeric PTC material, so that its resistance value will increase rapidly. This increase in resistance will cause the current to decrease, resulting in the tripping of the appliance.

After the load is removed or the current is reduced from the rated current of the fuse, the temperature of the fuse will gradually decrease, the resistance value of the fuse will also decrease, and the overcurrent protection circuit will resume normal operation, which will help to ensure the reliability of the protection circuit.

SRP120SF is mainly used in electric power supply systems, lighting systems, electronic and electrical equipment, telecommunications equipment, automotive electronics and other electronic products. By providing fuse current protection for a variety of circuit systems, it can effectively protect the entire system from overload and overheating. It is suitable for any environment, climate and circumstance in the world.

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