PFRA.135.2

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PTC Resettable Fuses are widely used in a variety of applications, ranging from consumer electronics to industrial systems. PFRA.135.2 is one of them, which is mainly used for over-current protection in computer memory systems and digital transmission power supplies. In this article, we will discuss the application field and working principle of PFRA.135.2.

PFRA.135.2 belongs to one type of surface mount resettable fuses, which can provide over- current protection in computer memory systems and digital transmission power supplies. The fuse features a lead-free construction with a terminal Tin/Lead plated finish. The fuse is rated for a maximum operating temperature of up to 200°C. It has 86% power dissipation efficiency at 25°C and 85% power dissipation efficiency at 110°C.

The PFRA.135.2 is designed for use in high current applications in which the current exceeds the rated maximum or melts the insulation of the wire. This type of fuse helps prevent electrical damage from over-currents in such environments. In addition, the fuse provides a high interrupt rating of 300Vac/500Vdc, making it suitable for a wide range of applications.

The working principle of the PFRA.135.2 is quite simple. When an overload current flows through the fuse, a thermal element inside the fuse heats up, causing the resistor to expand and blocking the flow of current. This prevents any further electrical damage and resetting the fuse. Upon resetting, the internal element cools down and the resistor returns back to its original state, allowing the circuit to work normally.

To sum up, the PFRA.135.2 is a highly reliable and efficient Surface Mount Resettable fuse that is mainly used for over-current protection in computer memory systems and digital transmission power supplies. It has a lead-free construction with a terminal Tin/Lead plated finish and a maximum operating temperature of up to 200°C. The fuse provides a high interrupt rating of 300Vac/500Vdc and has 86% power dissipation efficiency at 25°C and 85% power dissipation efficiency at 110°C. The working principle is simple, as it has a thermal element that expands when overheated and blocks the flow of current, thus resetting the overload and protecting the circuit.

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