PFRT.014.250.U Circuit Protection

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PTC Resettable Fuses

PTC (positive temperature coefficient) resettable fuses are low resistance electrical devices that help to protect circuits from overload and short-circuit conditions. They fuse and open the circuit when the current reaches an unsafe, predetermined level, and then reset when cooled. PTC resettable fuses offer an ideal method for protecting sensitive electronic circuits, such as those used for cellular telephones, digital cameras, motor control systems, and other electronic equipment.

PFRT.014.250.U, is a resettable fuse with a rated 32V AC and 250A rated current. This PTC fuse is designed for high reliability and has a reliable over-current protection function. In the event of an overload or a short circuit, the device quickly fuses open and protects the circuit. It also has a temperature-controlled auto-clear switch, which automatically restarts the circuit after the over-current condition is cleared.

PFRT.014.250.U has a wide range of applications. It is suitable for use in dozens of consumer electronic devices as well as telecommunication systems, industrial automation, and other electronic equipment. In addition, this type of resettable fuse can be used for over-current protection in battery and solar power systems. As this product is one of the smallest and fastest-responding resettable fuses available, it is ideal for use in limited space areas.

Working Principle

The working principle of the PFRT.014.250.U resettable fuse is based on the thermal-magnetic effect. When the current flowing through the device reaches the selected pre-set level, the device quickly fuses open and stops the current passing. The device also has a temperature-controlled auto-clear switch which restarts the device when the temperature returns to a normal level while dissipating the residual current.

The reset mechanism on this PTC fuse is based on a patented thermal-magnetic technique, which has a much lower temperature rise than traditional Silicon-based PTC fuses. This patented technology helps to reduce the temperature rise of the fuse, in order to prevent the auto-clear switch from causing excessively high temperatures near the resistor which can damage the thermal protection components and shorten the life of the components.

The PFRT.014.250.U resettable fuse is one of the most reliable and efficient devices on the market for over-current protection. Its fast-acting fuse and reset action are suitable for a wide range of applications and is a must-have for protecting sensitive electronic circuits.

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