Tyco Electronics' Polyswitch Rkef Device

Tyco Electronics has introduced its line of PolySwitch circuit protection devices. Designed for use in a wide variety of general electronic products – ranging from industrial controls to battery packs – the PolySwitch RKEF devices are functionally equivalent to the company’s existing RXEF overcurrent protection devices, but are available in a smaller form factor. Key device parameters for the PolySwitch RKEF series include hold-current ratings of 0.50A to 5.00A and trip-current ratings of 1.00A to 10.0A. All devices have a maximum operating voltage rating of 60V and can operate at up to 85°C - the same maximum operating temperature as the RXEF series.



The PolySwitch RKEF devices are of through-hole construction, and many of the radial-leaded devices have the same lead spacing as the RXEF devices. This facilitates easy replacement of RXEF devices and can help designers optimize board space and improve thermal conditions. Lead spacing for the RKEF250 and RKEF300 devices is half that of the equivalent RXEF parts, yielding even more space. The PolySwitch RKEF devices are EU ROHS and ELV compliant, are compatible with industry standard installation procedures, and are available in tape and reel packaging for compatibility with high-volume manufacturing. Price of the device starts $0.10 - $0.30 in volume of 100k with delivery time of 8 weeks ARO.