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PTC Resettable Fuses

PTC resettable fuses are a type of self-resetting over current protection device that is designed to sense a fault current and open an internal connection interrupting the flow of current through a circuit. These devices are used in a variety of industries including automotive, telecom, and consumer electronics.

The most commonly used PTC resettable fuse is the RTEF 135. This device operates on a principle of positive temperature coefficient, meaning that when the device heats up it will open. The specific RTEF 135 component itself measures 1.35 x 1.50cm and is constructed of resistive polymeric material.

The main application field of the RTEF135 is in protecting consumer electronic devices from overcurrent faults such as short circuits. This device is designed as a fail-safe solution that will easily reset when the fault has been corrected. It is also a much safer solution to many types of problems than other types of fuses.

The working principle of a PTC resettable fuse, such as the RTEF135, is simple. When a fault current flows through the device, it begins to heat up, causing the resistive material to open. This interrupts the circuit and protects it from any further damage. Once the current is removed, the component will cool down and return to its original low-resistance state.

PTC resettable fuses have become an increasingly popular solution for over current protection due to their cost-effectiveness, ease of use, and reliability. The RTEF135 in particular is designed to be both small and durable enough to provide superior circuit protection in even the most challenging applications. Its wide range of applications and robust design make it an ideal choice for many different situations.

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