Power Electronics

PolySwitch Protects Motors and Transformers

The PolySwitch LVR series of resettable circuit protection devices from Raychem Circuit Protection, a business unit of Tyco Electronics, protects electric motors and transformers. When installed on the primary side of a transformer circuit, in proximity to heat-generating components, the PolySwitch LVR device helps provide both overcurrent and overtemperature protection with a single installed component.

Unlike single-use fuses, PolySwitch devices do not require replacement after a fault event. After the overcurrent condition is eliminated and power has been removed, the circuit is restored to normal operating condition. Compared to bimetal breakers, they offer greater flexibility, longer lifespan, and lower electromagnetic interference (EMI).

The PolySwitch LVR series includes components that are rated for line voltages of 120 Vac and 240 Vac, for up to 2 A of operating current at 20°C. They offer low resistance, fast time-to-trip, a low profile, and resettable functionality.

Samples are available now. Pricing is as follows: $0.306 LVR100S, $0.254 LVR075S, $0.338 LVR125S, $0.450 LVR200S.

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