The 856834-60R300XF is a polymeric PTC resettable fuse from the POLY-FUSE® 60R series. It is designed for circuit protection in electronic devices. This fuse has a maximum voltage rating of 60V and a maximum current rating of 40A. The hold current (Ih) is 3A and the trip current (It) is 6A. The time to trip is 19.8 seconds. The fuse has a radial, disc package and is mounted through hole. Its temperature range for operation is -40°C to 85°C. The initial resistance (Ri) is 40 mOhms and the post-trip resistance (R1) is 100 mOhms. It is approved by cURus and TUV. The 856834-60R300XF is an active product from Littelfuse Inc.