Monster Fuses > Fuses > 121200R4 121200R4 - S&C 8.25kV SM4 Part Number: 121200R4 Description: S&C 8.25kV SM4 Mfg Voltage: 7.2 Rating: 125 E Manufacturer: S&C Speed: STD Type: SM4 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:0.384 High:0.529 Average:0.45