20A Current Rating, Amp-Trap Form 101 Structure, High-Speed Semiconductor Protection Fuse, Form 101 Architecture, 250VAC/VDC Max Voltage, 200kA Interrupting Capacity at 250V, -40°C to +85°C Standard Operational Window | High-reliability commercial distribution power fuse manufactured by Mersen / Ferraz Shawmut featuring robust nickel-plated brass interface end caps, engineered to drop seamlessly into standardized open clip blocks, tolerate cyclic induction pulse strains, and cleanly isolate downstream variable speed motor drives | Industry Exact Equivalents: Shawmut A25X20, Mersen A25X20, Ferraz Shawmut A25X20, Gould A25X20 | Industry Functional Cross-References: Bussmann FWH-20A, Littelfuse L25S020, Edison E25S020 | Military Specification National Stock Number (NSN): 5920-01-248-0252