FWX-800A by Bussmann (Eaton) is a high-speed, non-indicating fuse designed for fast-acting protection in power electronics and other high-current circuits. It carries an 800 A rating and is rated for up to 600 V AC and 250 V DC, with interrupting capabilities up to 200 kAIC at 600 V AC and 50 kAIC at 250 V DC. The device uses blade-end terminals (with variants offering stud terminations) and comes in a large 2 in diameter by 3.84 in long body, reflecting its high current capability. As part of the FWX semiconductor fuse family, it is intended to protect semiconductor devices and power-conversion equipment where rapid fault isolation is critical.
