Class K Fuse Blocks - 250V
The Class K Fuse Blocks - 250V is part of the Mersen (formerly Ferraz Shawmut) fuse holders & blocks line, distributed by Gross Automation.

Ferraz Shawmut Class K Fuse Blocks accommodate all Class H and K power fuses. A choice of screw, pressure plate, box and special order stud connectors fit a wide range of stranded or solid copper or aluminum wire. Insulators are either molded glass-filled polycarbonate (GFPC) or phenolic with verified dielectric strength in excess of 2500V. 30, 60 and 100A fuse blocks feature a unique adder block which can be snapped onto 1-, 2- or 3-pole blocks to form multi-pole segmented blocks of as many poles as desired. All fuse clips are made of high conductivity tin-plated copper, with a choice of spring reinforced or non-spring reinforced clips in 30A and 60A. Clips 100A and above are spring reinforced.
Specifications
| Specification | Value |
|---|---|
| Ratings | AC: 250VAC: 30A, 60A, 100A, 200A, 400A, 600A, Withstand ratings: w/class H fuses - 10kA, w/class K fuses - 50kA; All fuse blocks meet the requirements of UL Std. 512; UL Listed, Guide IZLT, File E52283; UL Recognized Component, Guide IZLT2, File E52283; CSA Certified Class 6225, File 32169; RoHS Compliant |
Ratings
- AC: 250VAC: 30A, 60A, 100A, 200A, 400A, 600A, Withstand ratings: w/class H fuses - 10kA, w/class K fuses - 50kA
- All fuse blocks meet the requirements of UL Std. 512
- UL Listed, Guide IZLT, File E52283
- UL Recognized Component, Guide IZLT2, File E52283
- CSA Certified Class 6225, File 32169
- RoHS Compliant
Catalog Numbers
250 Volt Class H & K Fuse Blocks, 30 to 600 Ampere
| Amps | Insulator | Poles | Connector Type | Wire Range | Catalog Number (Non-Spring Reinforced Clips) | Catalog Number (Spring Reinforced Clips) | Notes |
|---|---|---|---|---|---|---|---|
| 30 | GFPC | Adder | Box | Al/Cu #2-14 | 20300+ | 20305+ | |
| 30 | GFPC | 1 | Box | Al/Cu #2-14 | 20301+ | 20306+ | 1-pole, 30A block does not accept adder pole |
| 30 | GFPC | 2 | Box | Al/Cu #2-14 | 20302+ | 20307+ | |
| 30 | GFPC | 3 | Box | Al/Cu #2-14 | 20303+ | 20308+ | |
| 30 | GFPC | Adder | Screw | Cu #10-14 | 20310+ | 20315+ | |
| 30 | GFPC | 1 | Screw | Cu #10-14 | 20311+ | 20316+ | 1-pole, 30A block does not accept adder pole |
| 30 | GFPC | 2 | Screw | Cu #10-14 | 20312+ | 20317+ | |
| 30 | GFPC | 3 | Screw | Cu #10-14 | 20313+ | 20318+ | |
| 30 | GFPC | Adder | Pressure plate | Cu #10-14 | 20320+ | 20325+ | |
| 30 | GFPC | 1 | Pressure plate | Cu #10-14 | 20321+ | 20326+ | 1-pole, 30A block does not accept adder pole |
| 30 | GFPC | 2 | Pressure plate | Cu #10-14 | 20322+ | 20327+ | |
| 30 | GFPC | 3 | Pressure plate | Cu #10-14 | 20323+ | 20328+ | |
| 30 | GFPC | Adder | Box | Cu #4-14 | - | 20355+ | copper box connectors and clips, for copper wires only |
| 30 | GFPC | 1 | Box | Cu #4-14 | - | 20356+ | 1-pole, 30A block does not accept adder pole; copper box connectors and clips, for copper wires only |
| 30 | GFPC | 2 | Box | Cu #4-14 | - | 20357+ | copper box connectors and clips, for copper wires only |
| 30 | GFPC | 3 | Box | Cu #4-14 | - | 20358+ | copper box connectors and clips, for copper wires only |
| 60 | GFPC | Adder | Box | Al/Cu #2-14 | 20600+ | 20605+ | |
| 60 | GFPC | 1 | Box | Al/Cu #2-14 | 20601+ | 20606+ | |
| 60 | GFPC | 2 | Box | Al/Cu #2-14 | 20602+ | 20607+ | |
| 60 | GFPC | 3 | Box | Al/Cu #2-14 | 20603+ | 20608+ | |
| 60 | GFPC | Adder | Box | Cu #4-14 | - | 20655+ | copper box connectors and clips, for copper wires only |
| 60 | GFPC | 1 | Box | Cu #4-14 | - | 20656+ | copper box connectors and clips, for copper wires only |
| 60 | GFPC | 2 | Box | Cu #4-14 | - | 20657+ | copper box connectors and clips, for copper wires only |
| 60 | GFPC | 3 | Box | Cu #4-14 | - | 20658+ | copper box connectors and clips, for copper wires only |
| 100 | GFPC | Adder | Box | Al/Cu 2/0-#6 | - | 21035+ | |
| 100 | GFPC | 1 | Box | Al/Cu 2/0-#6 | - | 21036+ | |
| 100 | GFPC | 2 | Box | Al/Cu 2/0-#6 | - | 21037+ | |
| 100 | GFPC | 3 | Box | Al/Cu 2/0-#6 | - | 21038+ | |
| 100 | GFPC | Adder | Box | Cu 2/0-#12 | - | 21005+ | copper box connectors and clips, for copper wires only |
| 100 | GFPC | 1 | Box | Cu 2/0-#12 | - | 21006+ | copper box connectors and clips, for copper wires only |
| 100 | GFPC | 2 | Box | Cu 2/0-#12 | - | 21007+ | copper box connectors and clips, for copper wires only |
| 100 | GFPC | 3 | Box | Cu 2/0-#12 | - | 21008+ | copper box connectors and clips, for copper wires only |
| 200 | Phenolic | 1 | Box, side-clip | Al/Cu 350kcmil-#6 | - | 22001+ | |
| 200 | Phenolic | 3 | Box, side-clip | Al/Cu 350kcmil-#6 | - | 22003+ | |
| 200 | Phenolic | 1 | Box, side-clip | Cu 350kcmil-#6 | - | 22051+ | copper box connectors and clips, for copper wires only |
| 200 | Phenolic | 3 | Box, side-clip | Cu 350kcmil-#6 | - | 22053+ | copper box connectors and clips, for copper wires only |
| 400 | Phenolic | 1 | Box, side-clip | Al/Cu 1000-250kcmil | - | 24001+ | Not UL Listed or CSA Certified |
| 400 | Phenolic | 3 | Box, side-clip | Al/Cu 1000-250kcmil | - | 24003+ | Not UL Listed or CSA Certified |
| 400 | Phenolic | 1 | Box, side-clip | Cu 1000-250kcmil | - | 24051+ | Not UL Listed or CSA Certified; copper box connectors and clips, for copper wires only |
| 400 | Phenolic | 3 | Box, side-clip | Cu 1000-250kcmil | - | 24053+ | Not UL Listed or CSA Certified; copper box connectors and clips, for copper wires only |
| 400 | Phenolic | 1 | Box, in-line clip | Al/Cu (2) 350kcmil-#4 | - | 24031+ | |
| 400 | Phenolic | 3 | Box, in-line clip | Al/Cu (2) 350kcmil-#4 | - | 24033+ | |
| 400 | Phenolic | 1 | Box, in-line clip | Cu (2) 350kcmil-#6 | - | 24061+ | copper box connectors and clips, for copper wires only |
| 400 | Phenolic | 3 | Box, in-line clip | Cu (2) 350kcmil-#6 | - | 24063+ | copper box connectors and clips, for copper wires only |
| 600 | Phenolic | 1 | Box, in-line clip | Al/Cu (2) 500kcmil-#4 | - | 2631+ | |
| 600 | Phenolic | 3 | Box, in-line clip | Al/Cu (2) 500kcmil-#4 | - | 2633+ | |
| 600 | Phenolic | 1 | Box, in-line clip | Cu (2) 500kcmil-#4 | - | 2661+ | copper box connectors and clips, for copper wires only |
| 600 | Phenolic | 3 | Box, in-line clip | Cu (2) 500kcmil-#4 | - | 2663+ | copper box connectors and clips, for copper wires only |