Monster Fuses > Fuses > 253250R4 253250R4 - S&C 23kV SM4 Part Number: 253250R4 Description: S&C 23kV SM4 Mfg Voltage: 23 Rating: 150 E Manufacturer: S&C Speed: S 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:N/A High:N/A Average:0.373