RUEF300-1

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PTC Resettable Fuses

PTC resettable fuses are often referred to as polymer-based fuses, positive temperature coefficient (PTC) or simply "polyfuses" - they are used widely across a range of devices and applications. The RUEF300-1 is a surface-mount, medium-current over-current protection device made by Polyfuse, Inc.

Application Field of RUEF300-1

RUEF300-1 is an electrothermal fuse designed for high-efficiency protection against over-current or short-circuit in power supplies, communications and other electronics products. It can also be used in various consumer electronics products. It is suitable for PCB applications, and can be used with automated assembly equipment.

Some of the advantages the RUEF300-1 offers include its low power consumption, high voltage protection, and small size. It is also highly reliable and offers a wide operating temperature range. Additionally, it features a solderable termination, offers a fast trigger response time, and features a low voltage rating for enhanced low-snap current characteristics.

Typical applications for the RUEF300-1 include telecom powerbanks, data lines, consumer electronics, game consoles, audio/video devices, and gateway equipment.

Working Principle of RUEF300-1

The RUEF300-1 is a current- and temperature-sensitive element. It is designed to respond to both current overload and temperature, triggering an open circuit condition in response to either condition. Once the over-current or temperature condition is removed, the over-current protection device will reset automatically.

When the current reaches the melt point of the fuse, it triggers a drop in voltage. This triggers the semiconductor within the fuse, which in turn causes a membrane rupture. This membrane rupture results in the two sides of the fuse separating, thus forming an open circuit. The two sides of the fuse are then re-sealed once the current is removed, thus resetting the fuse.

The RUEF300-1 is designed to respond quickly and reliably to varying temperature and current overloads, thus providing protection against damage to other components in a circuit. It also offers excellent sheltering effect and interference immunity while being highly temperature-stable.

Conclusion

The RUEF300-1 is a PTC resettable fuse designed for high-efficiency, reliable protection against over-current and short-circuits. It is suitable for a wide range of consumer electronics, power supplies, and communications applications. The device offers a fast trigger response time, low power consumption, high voltage protection, and a wide temperature range. It is an essential part of any circuit board, and its use ensures that the components within a circuit are well protected .

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