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 1.8A * Trip time 7.2 sec * Hold current 0.9A * Max voltage 72V * Max current 40A * Radial leaded package * Initial resistance 0.2 to 0.31R * Post-trip resistance 0.47R * Lead pitch 5.1mm * Dimensions 11.7mm x 7.6mm x 15.7mm * UL and TUV approved Note: Previously manufactured by Raychem. https://elecena.pl/product/27216267/littlefuse-rxef090-0-9a-polyswitch-fuse 2024-11-10 https://elecena.pl/product/27216267/littlefuse-rxef090-0-9a-polyswitch-fuse 2025-03-22 https://elecena.pl/product/27216267/littlefuse-rxef090-0-9a-polyswitch-fuse 2025-05-21 https://elecena.pl/product/27216267/littlefuse-rxef090-0-9a-polyswitch-fuse 2025-06-27 https://elecena.pl/product/27216267/littlefuse-rxef090-0-9a-polyswitch-fuse 2025-07-17 https://elecena.pl/product/27216267/littlefuse-rxef090-0-9a-polyswitch-fuse 2026-04-08