Eaton Bussmann Series 50FE — High‑Speed British Standard (BS88) Fuse

Compact BS88 FE single‑barrel high‑speed fuse for semiconductor protection in AC and DC power conversion equipment.

Key specifications

• Catalog number: 50FE
• Fuse type: FE (BS88 single‑barrel)
• Amperage rating: 50 A
• Rated voltage: 690 V AC (IEC) / 700 V AC (UL); 500 V DC
• Interrupt rating: 200 kA RMS Sym (AC); 50 kA @ 500 V DC
• Utilization category: aR (semiconductor protection)
• Rated switching capacity: 200 kA
• Clearing (I²t): 380 A²s @ 415 V; 600 A²s @ 660 V
• Pre‑arc (I²t): 103 A²s
• Watt losses: 11 W
• Fuse shape / connection: Single barrel with offset bolted tags; blade‑end × blade‑end connection
• Center‑to‑center distance: 61.8 mm; mounting stud M6
• Mounting method: Stud (bolted)
• Dimensions (L × W × H): 76 × 20 × 20 mm
• Weight: 40.8 g
• Compliance & standards: CE marked, RoHS compliant; IEC rated, UL recognized; designed/tested to BS88 part 4 / IEC 60269‑4

Typical applications

• Semiconductor protection (IGBTs, thyristors)
• DC common bus systems and power cabinets
• DC drives, motor controllers, power converters and rectifiers

Compatible Eaton accessories

• EC‑600 trip indicator kit
• TI700 fuse indicator
• MAI / MBI microswitch adapters