Class J modular ferrule fuse blocks (JM)

JM (Class J) modular ferrule fuse blocks for fuses up to 60 amps.

These new Bussmann series fuse blocks contain multiple features that increase versatility, reduce labor and enhance safety for any panel or electrical system design.

Power distribution fuse blocks

Also available are 30, 60, 100, 200 and 400 amp Class J modular power distribution fuse blocks, that combine fuse block and power distribution block in one unit. See data sheet 10192.

Data sheet no. 10289 (30 and 60 A blocks)

Data sheet no. 10488 (30 to 600 A blocks)

Power distribution data sheet no. 10192

Product profile no. 10309

Drawing downloads (PDF, DXF/DWG, IGS, STEP)

Catalog Number JM60030-(poles)(terminal type) - 600V, 30A Class J blocks, JM60060-(poles)(terminal type) - 600V, 60A Class J blocks
Volts 600V
Amps Up to 60A
Withstand 200kA RMS Sym
Dimensions See data sheet no. 10289
Agency information Blocks- UL Listed E14853 - IZLT
- CSA Certified 47235-6225-01
- CE
- RoHS Compliant
- Conflict mineral free
- REACH declaration available upon request
- UL Listed E58836 - JDVS
- CSA Certified 47235-6225-01
- RoHS Compliant
- REACH declaration available upon request
Flammability ratings - Blocks — UL 94V0, self-extinguishing
- Covers — UL 94HB, self-extinguishing
Operating and storage temperature range: Blocks
-40°C to +120°C
- Non-Indicating -40°C to +120°C
- Indicating -20°C to +90°C*
* Indication requires minimum 90Vac/dc and closed circuit to illuminate.


  • Available in 1-, 2-, and 3-pole configurations to meet stocking requirements.
  • To reduce inventory, assembly time and labor, modular single-pole blocks snap-together for tool-less assembly of multiple poles at point of use.
  • DIN-Rail and panel mount versatility allows one product to be used for multiple applications with lower inventory cost.
  • Save panel space with the smallest width dimension on the market.
  • Optional see-through, IP20 finger-safe covers enhance safety with lock-out/tag-out capability.
  • Optional open fuse indication on covers speeds troubleshooting.
  • Easy circuit identification with available universal marker labels for blocks and covers.

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