Monster Fuses > Fuses > 704020 704020 - S&C 38kV SMU20 Part Number: 704020 Description: S&C 38kV SMU20 Mfg Voltage: 34.5 Rating: 20 K Manufacturer: S&C Speed: K Type: SMU20 Keywords: CMU704020, DBU38-20K, BBU38-20K 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:3.311 High:3.426 Average:3.651