RUE900

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PTC resettable fuses, or polymeric positive temperature coefficient fuses, are becoming increasingly popular for overcurrent protection in medium and low voltage applications. PTC resettable fuses offer superior protection against electrical faults with a low temperature coefficient and predictable current-breaking performance. The RUE900 series of PTC resettable fuses from Littelfuse are designed for use in medium voltage applications (600V and beyond) and can be used to provide reliable overcurrent protection on a wide range of products.

The RUE900 is a dual source, that is, both AC and DC current, solid state resettable fuse. It is designed for use in a wide range of applications, from industrial control panels to electronic test equipment. The RUE900 has a wide temperature range and is UL recognized, meeting the safety requirements of the Underwriters Laboratory. In addition, the RUE900 has a low voltage dissipation rate (Vd) and is mechanically rugged, providing superior overcurrent protection in a wide variety of applications

The RUE900 can handle voltage and current loads up to 600V and over 325A, depending on the fuse rating. The fuse has two primary parts: the body and the polymeric element. The body houses the polymeric element, which is a material that will become increasingly resistive when it reaches a certain temperature. This thermal impedance increases at higher temperatures, providing protection from overcurrent. The RUE900 also has a low temperature coefficient, which provides greater accuracy in determining the overcurrent protection level.

In operation, the RUE900 has two modes: the active mode and the hold mode. In the active mode, the fuse is reset automatically when the voltage and current flow goes above the rated value. The hold mode is activated when the fuse has been reset and must be manually reset before it can resume operation. The resetting process requires a few seconds and ensures that the fuse has not become damaged or degraded from the overcurrent.

In addition to its overcurrent protection capabilities, the RUE900 also has a number of other features that make it well suited for use in a wide range of applications. The fuse can be user-programmed to switch between active and hold modes, allowing it to be used as a micropower switch, for example, to control a motor. The RUE900 also has a temperature cycling feature which allows for the fuse to automatically switch between high and low temperature settings, allowing for improved reliability in temperature sensitive applications.

The RUE900 series of PTC resettable fuses from Littelfuse are an ideal choice for medium voltage applications and provide superior overcurrent protection, user programmability and temperature cycling. They are UL recognized, robust and reliable, making them well suited for a wide range of applications. The RUE900 series is a cost-effective and reliable option for medium voltage applications that require reliable and fast overcurrent protection.

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