Menlo Park, Calif. Raychem Circuit Protection, a business unit of Tyco Electronics, has introduced the PolySwitch LVR series of resettable circuit protection devices to help protect electric motors and transformers used in commercial and home appliances from failures caused by mechanical overloads, overheating, and other potentially damaging conditions.
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. The low-profile protection devices offer low resistance, fast time-to-trip, and resettable functionality.
The PolySwitch LVR devices' resettable functionality and latching features make them a reliable, cost-effective circuit protection solution for both intermittent and continuous-operation motor applications.
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 bi-metal breakers, they offer greater flexibility, longer lifespan, and lower electromagnetic interference (EMI), said the company.
PolySwitch LVR devices also help prevent damage where faults may cause a rise in temperature with only a slight increase in current draw. When installed on the primary side of a transformer circuit, in proximity to heat-generating components such as magnetics, field-effect transistors (FETs), or power resistors, the PolySwitch LVR device helps provide both overcurrent and overtemperature protection with a single installed component.
The RoHS-compliant PolySwitch LVR devices are compliant with the UL 1434 standard, and are compatible with lead-free solders and high-volume assembly processes.
Pricing: $0.306 for LVR100S, $0.254 for LVR075S, $0.338 for LVR125S, and $0.450 for LVR200S
Availability: Samples are available. Delivery is eight to ten weeks ARO.
Product information: PolySwitch LVR
Raychem Circuit Protection, 1-800-227-7040, www.circuitprotection.com