RKEF050

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PTC resettable fuses are overcurrent protection devices that automatically open the circuit and cut off the current when an overcurrent occurs, and reset after the malfunction is eliminated. The RKEF050 PTC resettable fuse belongs to an ultra-micro resettable fuse within the PTC resettable fuse family and is a self-recovery resistor which has the advantages of low power consumption and fast response.

Application field:

The RKEF050 PTC resettable fuse is mainly used in DC circuits, such as personal computers, mobile phones, LCD TVs, watches, etc. In these circuits, the reliable protection of the RKEF050 PTC resettable fuse prevents them from malfunctioning due to overcurrent. Besides, the ultra-miniature RKEF050 PTC resettable fuse also provides a small size and softer circuit protection for home, scientific and technological appliances, lighting, toys, consumer electronics, or automotive, communication, and medical products.

Working Principle:

The RKEF050 PTC resettable fuse is triggered by a thermistor component, and when an overcurrent flows, the thermistor will sense the heat energy and the resistance of the thermistor will increase rapidly. This sudden increase breaks the continuity of the circuit, thereby cutting off the current. When the overcurrent stops, the fuse deforms, cools down, and the thermistor returns to its normal state and self-recovery.

The RKEF050 PTC resettable fuse is also equipped with a small latch that prevents the fuse from closing back with the circuit even when the current is not detected. To reset the fuse, the latch must be manually tripped to trigger the fuse to restore itself to its normal state and to reconnect the circuit.

Conclusion:

The RKEF050 PTC resettable fuse is a self-recovery resistor, which is small in size and fast in response. It is mainly used in DC circuits, such as personal computers, mobile phones, LCD TVs, watches, toys, etc. When overcurrent occurs, it can quickly cut off the current and reset after the malfunction is eliminated. The RKEF050 PTC resettable fuse provides reliable circuit protection, and is widely used in home, scientific and technological appliances, lighting, automotive, communication, and medical products.

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