VLP270XUF

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The VLP270XUF is a part of the polymeric positive temperature coefficient (PTC) resettable fuse line from Littelfuse. Unlike traditional fuses which need to be replaced, this PTC fuse will automatically reset itself and start working again after an overload or short-circuit event is cleared.

The VLP270XUF PTC resettable fuse is designed mainly for battery powered applications, including consumer electronics, cordless electronics, small appliances, and medical equipment. It is especially suited for Li-Ion and Li-Polymer battery packs in electronic products such as digital cameras, mobile phones, GPS devices, tablets, and portable music players.

In consumer electronics, the VLP270XUF is used to protect rechargeable batteries from overcharging, overpowering, short-circuiting, and under-current. It prevents extended battery drain by automatically cutting out when the current draw becomes too low. Additionally, the VLP270XUF will guard the consumer electronics product from power surges, voltage spikes, and other power related anomalies.

The working principle of the VLP270XUF is quite simple. It is essentially a semiconductor device with a temperature sensitive element that responds to electrical current. When the current in an overcharge or overcurrent event reaches a specific level, the element heats up due to the increased energy. This heat causes the device to switch off, effectively cutting off power to the system and preventing any further damage.

Once the system is switched off, the element is allowed to cool. As it cools, the element will revert to its natural state, and the fuse will reset itself. This allows for the system to operate again, without the need for the user to replace the device. This process of resetting can be used repeatedly, and the fuse will automatically reset itself each time.

The main advantage of using the VLP270XUF is that it eliminates the need to regularly replace fuses, which can be quite expensive. Furthermore, since the device will reset itself due to current anomalies, the consumer does not need to spend time troubleshooting the system.

An additional benefit of the VLP270XUF is that it is very small and light, and thus can be used in a wide range of applications. It is also highly reliable and offers excellent protection against power surges and overcurrent. Finally, the VLP270XUF PTC resettable fuse is relatively inexpensive when compared to other types of fuses.

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