PFRX.135.3 Circuit Protection

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PTC resettable fuses, or poly-fuse, are types of electronic components used for overcurrent protection. The PFRX.135.3 is a specific type of PTC fuse designed for 12-volt and 24-volt DC systems. It has been developed to provide longer life and better performance compared to other types of PTCs.

A PTC fuse consists of a semiconductor material with special characteristics. When normal current conditions are present, the material has low electrical resistance. When an overcurrent or short-circuit condition occurs, the resistance of the material increases rapidly, causing it to break the circuit and protect the upstream components. The PTC fuse will allow the circuit to reset itself after the overcurrent or short-circuit condition has been eliminated.

The PFRX.135.3 is a radial lead PTC resettable fuse specifically designed to protect 12-volt and 24-volt DC circuits. It is available in two different sizes: a 12mm lead spacing and a 13.5 mm lead spacing. It has a rated current of up to 135 Amps or continuous current of up to 40 Amps and a nominal voltage of 125V.

The features of the PFRX.135.3 PTC fuse make it ideal for overcurrent and short-circuit protection. It is an ideal solution for a wide range of applications, including automotive, portable medical, IT equipment, and power adapter applications. It offers fast response to overcurrent and short-circuit conditions and is UL-approved for safety. It also has reverse voltage protection, low operating temperature, and self-reset capability for added protection.

The working principle of the PFRX.135.3 PTC fuse is simple. When a normal current condition is present, the semiconductor material has low electrical resistance. However, when an overcurrent or short-circuit condition occurs, the resistance of the material increases rapidly, causing it to break the circuit and protect the upstream components. After the overcurrent or short-circuit condition has been eliminated, the PTC fuse will then reset itself.

The PFRX.135.3 is a versatile PTC fuse, offering effective overcurrent and short-circuit protection for 12-volt and 24-volt DC circuits. It is suitable for a wide range of applications, including automotive, portable medical, IT equipment, and power adapter applications. It has a fast response to overcurrent and short-circuit conditions, reverse voltage protection, low operating temperature, and self-reset capability. With its high current rating, reliable construction, and UL approval, the PFRX.135.3 is an excellent choice for protecting 12-volt and 24-volt DC circuits from overcurrent and short-circuit conditions.

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