SRP120SSF

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A PTC resettable fuse, such as the SRP120SSF, is a form of highly effective overcurrent protection that is widely used in sensitive and delicate electronic applications. It is designed to reset and recharge itself after it has experienced an overcurrent event, deeply ensuring the performance and safety in any given application.

The SRP120SSF is a small, One Time Programmable (OTP) circuit board mounted fuse with a 12V voltage rating. It is designed to provide protection against high current conditions, or short-circuits, prior to applying power to devices. The SRP120SSF is widely used in consumer applications such as computers, phones, game consoles, speakers, and other electronics, as well as industrial systems and other sensitive electrical systems.

The SRP120SSF is a polymeric positive temperature coefficient (PPTC) resettable device. It is designed to protect against overcurrents in electronic circuits up to 12V. When an overcurrent condition occurs, the SRP120SSF will open in order to protect the connected components. The PPTC element will then reset itself and turn back on when the overcurrent is removed, providing the component with overcurrent protection.

The SRP120SSF is composed of two layers of conductive polymer, metal gel, and a conducting element, sandwiched between these two layers. The metal gel layers act as a weak electric connection when an overcurrent is applied. When this occurs, the metal wires fuse together and a short circuit is formed. This short circuit causes a rapid increase in temperature, which then causes the material to swell in size and break the conducting element. This effectively disconnects the circuit, preventing further current from flowing.

Once the current is relaxed, the SRP120SSF begins to reset itself by slowly and automatically applying a controlled voltage across it in order to heal the short circuit connection. This reset process takes place as long as the overcurrent event that caused the initial failure has been removed. The complete reset of the device takes a few seconds and, once the reset is completed, the device is able to withstand continued overcurrent events.

The SRP120SSF is a highly effective protections device that is capable of providing efficient and reliable overcurrent protection across a wide range of circuits. Its self-resetting technology ensures that power is not disrupted and the device continues to operate in the event of an overcurrent event. This makes it an ideal choice for protecting sensitive equipment in consumer applications and industrial systems.

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