0680-4000-01 is a square ceramic surface mount slow blow fuse from Bel Fuse's SST series, rated for 4A continuous current with a 2410 SMD package size. The fuse features a typical cold resistance of 0.024 ohms, a maximum volt-drop of 0.19V at rated current, and a melting I²T rating of 23 A²·sec (<10 msec) and 26 A²·sec (@10 In). It operates across a wide temperature range from -55°C to +125°C and is compatible with 260°C lead-free solder processes, making it suitable for automated SMD assembly. The fuse is RoHS compliant, halogen-free, lead-free, and AEC-Q compliant, with applications in power supplies, POE/POE+ systems, LCD/LED monitors and TVs, and industrial and medical equipment.