Accessories for Fuses & Fuse Systems

Fuse Reducers

Class J Fuse Reducer - J

Mersen fuse reducers allow the use of lower rated fuses in existing equipment having clips with higher ampere ratings. The use of closer rated time-delay fuses can improve circuit protection. For example, renewable or one-time fuses feeding a motor can be replaced with fuses sized closer to the motor nameplate current. Non-rejection reducers will allow Class H, K or R fuses to fit Class H or K clips. Rejection-type reducers will allow only Class R fuses to fit Class R clips or only Class J fuses to fit Class J clips. Class J fuse reducers are not for bolt on applications.



  • Volts (VAC) 600 VAC
  • Volts (VDC) 600 VDC
  • Class J
  • SCCR 200 kA
  • Standards 250V and 600V Class H, K, and R - UL Listed Guide No. IZZR, CSA Certified. 600V Class J - UL Listed Guide No. IZZR, CSA Certified 30-600A
  • ROHS Compliant Consult Technical Services
  • Lead Free Consult Technical Services
  • CE conformity Consult Technical Services
  • UL File Card E105670 IZZR.E105670
  • CSA File Card Class: 6225-01 File: 207417


  • J136 - K217014
  • J166 - T217528
  • J216 - E218044
  • J236 - H218553
  • J266 - V219599
  • J416 - M222053
  • J426 - X222798
  • J616 - K223316
  • J626 - B201136
  • J636 - K201650
  • J646 - M205102



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