Cooper Bussmann FWX-15 Semiconductor Fuse 250V

FWX-15A14F is a high-speed semiconductor fuse from Bussmann (Eaton) rated for 15 A and 250 V, in a 14 × 51 mm ferrule-style package (approximately 2 in long, 9/16 in diameter) with a ceramic body and non-indicating ends. It features ferrule end caps and is UL Recognized, CSA Certified, and CE-marked, making it suitable for 250 VAC circuits in North American and international equipment. It delivers up to 200 kA interrupt current at 250 VAC and 50 kA at 250 VDC, and is designed for fast fault clearing with low arc voltage and low energy let-through (I²t). Typical applications include DC common bus, DC drives, power converters/rectifiers, and reduced-voltage starters, especially in semiconductor-powered power stages and DC power rails. In catalogs, FWX-15A14F is the direct Bussmann variant of the 15 A, 14 × 51-mm high-speed fuse and is cross-listed with Littelfuse L25S and Mersen A30QS in multi-brand inventories. This 14 × 51 mm fuse fits standard 14 × 51 mm fuse blocks rated for 250 VAC, providing reliable protection with a compact form factor for high-speed protection needs.