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Transparent open fuse block, three-pole, glass-filled polycarbonate body with box-lug connectors

Mersen

Mersen 21038R Open Fuse Block 61-100A 250V 3-Pole

SKU CH-Y15R-5F9GD

A three-pole open fuse block for 61 to 100 A Class R fuses at 250 V AC/DC with box-lug connectors for 6 to 2/0 AWG wire and bolt-down mounting

  • TypeFuses & Accessories
  • ColorTransparent
  • Handles up to 100 A for heavy-duty circuits
  • Three-pole layout protects all phases simultaneously
  • 250 V AC/DC rating suits industrial power systems
  • Glass-filled polycarbonate body resists heat and impact
  • Spring-reinforced clips ensure secure fuse retention

Fuse Block 61-100A 250V 3-Pole

The Mersen 21038R open fuse block accepts Class R fuses rated from 61 to 100 amperes at 250 volts AC or DC. Three poles provide over-current protection for three-phase or multi-circuit installations. The transparent glass-filled polycarbonate body allows visual inspection of the fuse links. Box-lug connectors accept conductors from 6 AWG to 2/0 AWG.

Check Fuse Series and Mounting Before Ordering

Verify that the replacement fuses belong to the compatible series such as A2D-R, A2K-R, FLNR, FRN-R, KLNR, KTN-R, KWN-R, LLNRK, LPN-RK or TR-R. Confirm the fuse physical size matches 5 7/8 inches long by 1 1/16 inches diameter. Ensure the mounting surface suits the bolt-down style and that the panel cut-out accommodates the 8.33 inch length, 4.72 inch width and 2.28 inch height.

Sustained Load Behaviour

Spring-reinforced clips maintain firm contact with the fuse ferrules during continuous operation up to the 100 ampere rating. The open design promotes natural convection around the fuse elements, helping to dissipate heat during prolonged high-current periods. Glass-filled polycarbonate retains mechanical strength and dielectric properties at the elevated temperatures typical of sustained loads near the maximum rating.

Highlights

  • Handles up to 100 A for heavy-duty circuits
  • Three-pole layout protects all phases simultaneously
  • 250 V AC/DC rating suits industrial power systems
  • Glass-filled polycarbonate body resists heat and impact
  • Spring-reinforced clips ensure secure fuse retention

Specifications

BrandMERSEN
TypeFuses & Accessories
ColorTransparent

Questions about this item

What components come with the 21038R fuse block and what must be purchased separately?

The block includes the glass-filled polycarbonate body with spring-reinforced box-lug clips for 6 to 2/0 AWG wire. Class R fuses (61-100 A, 5 7/8 in x 1 1/16 in) are sold separately.

Which fuse series should I select for the 3-pole 250 V block?

Choose any UL Class R series listed — A2D-R, A2K-R, FLNR, FRN-R, KLNR, KTN-R, KWN-R, LLNRK, LPN-RK or TR-R — rated 61 to 100 A.

How does the 100 A rating apply when the block is installed in a panel?

The block accepts fuses up to 100 A at 250 V AC/DC; the continuous current is limited by the chosen fuse and the 6 to 2/0 AWG conductors you terminate.

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