The Littelfuse Polyswitch is a resettable device that performs like a fuse under overcurrent conditions, but is unique in that it will reset. As soon as an overcurrent condition is reached the Polyswitch heats up to its trip temperature. * Trip current 1A * Trip time 4 sec * Hold current 0.5A * Max voltage 72V * Max current 40A * Radial leaded package * Initial resistance 0.5 to 0.77R * Post-trip resistance 1.17R * Lead pitch 5.1mm * Dimensions 7.9mm x 7.6mm x 13.7mm * UL and TUV approved Note: Previously manufactured by Raychem. https://elecena.pl/product/27216269/littlefuse-rxef050-0-5a-polyswitch-fuse 2024-11-10 https://elecena.pl/product/27216269/littlefuse-rxef050-0-5a-polyswitch-fuse 2025-05-21 https://elecena.pl/product/27216269/littlefuse-rxef050-0-5a-polyswitch-fuse 2025-09-16 https://elecena.pl/product/27216269/littlefuse-rxef050-0-5a-polyswitch-fuse 2026-04-08