Monster Fuses > Fuses > A50P800-4 A50P800-4 - Semiconductor Fuses 500V Part Number: A50P800-4 Alternate Part Number: A50P800 Description: Semiconductor Fuses 500V Class: FORM 101 Mfg Voltage: 500 Rating: 800 A Manufacturer: Mersen Speed: F Keywords: FWH-800A, L50S800 Photo is a representation of product. Voltage, amperage, and other details may vary. Request a Quote Resistance Test Results: Manufacturer's Fuse mΩ Values Low:0.1 High:0.1215 Average:0.109