Mersen Class H/K Box Lug Fuse ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$44.11
Mersen Class H/K Box Lug Fuse Block, 250VAC/250VDC

Mersen Class H/K Box Lug Fuse Block, 250VAC/250VDC

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Model: 20601

In Stock (leaves warehouse same day if ordered before 3pm ET)

$44.11
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Mersen Class H/K Box Lug Fuse Block, 250VAC/250VDC

Mersen Class H/K fuse blocks accommodate Class H and K 250V power fuses in a rugged box lug connector design rated 250VAC/250VDC for dependable AC/DC circuit protection. This 1-Pole, 60A block delivers a 50kA short circuit current rating (SCCR) and features a glass-filled polycarbonate (GFPC) insulator with verified dielectric strength in excess of 2500V. High-conductivity tinplated copper fuse clips provide reliable, low-resistance contact for demanding industrial and commercial power distribution applications.

Key Features

  • Fuse Class: Accommodates Class H and K, 250V power fuses for flexible fuse selection.
  • Ampere Rating: 60A maximum fuse rating suited for medium-duty circuit protection.
  • Pole Configuration: 1-Pole design for single-circuit fuse mounting.
  • Durable Construction: Glass Filled Polycarbonate (GFPC) insulator body with dielectric strength verified in excess of 2500V.
  • Box Lug Connector: Box connector accepts a wide range of stranded or solid copper or aluminum wire.
  • High-Conductivity Clips: Tinplated copper fuse clips deliver dependable, low-resistance contact.
  • Electrical Ratings: Rated 250VAC/250VDC with a 50kA short circuit current rating (SCCR) and 50/60 Hz frequency, AC/DC compatible.
  • Mounting & Installation: Direct screw mount installation with clip-in fuse installation method and a 45 lb-in torque rating.

Certifications & Compliance

  • RoHS Compliant

Technical Specifications

  • ROHS Compliant: Yes
  • Fuse Class: Class H/K
  • Ampere Rating: 60A
  • Number of Poles: 1-Pole
  • Rated Voltage AC/DC: 250V
  • Short Circuit Current Rating (SCCR): 50 kA
  • Torque Rating: 45 lb-in
  • Body/Insulating Material: Glass Filled Polycarbonate

Typical Applications

  • Industrial and Commercial Power Distribution Panels
  • Motor Control Centers and Switchgear
  • Panelboard and Load Center Fuse Mounting
  • OEM Equipment Circuit Protection
  • AC and DC Power Circuit Fusing

Why Mersen?

Mersen fuse blocks are engineered with high-conductivity tinplated copper clips and glass-filled polycarbonate insulation verified to a dielectric strength above 2500V, delivering dependable, code-compliant fuse mounting for demanding power distribution systems. RoHS compliant construction and a 50kA SCCR rating make these blocks a reliable choice for professional electrical installations requiring consistent AC/DC circuit protection.

Manufacturer Resources

Mersen Product Catalog

Product Specs

list_batch:
MERSEN-20260825
Product Type:
Fuse Block
Product Material:
Glass Filled Polycarbonate
Voltage Rating:
250V
Amperage Rating:
60A
Configuration:
1-Pole
Connection Type:
Box Lug
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuse Holders & Blocks

Mersen 20601 – Frequently Asked Questions

1) Can I use the Mersen 20601 on a 480V motor circuit?
No. The 20601 is rated 250VAC and 250VDC, so it cannot be applied on a 480V system regardless of the fuse installed. For 600V-class circuits, look at a 600V block such as the Littelfuse LFR60030-3CID (Class R, 600V 30A).
2) What wire can I land in the box lug, and what do I torque it to?
The box connector takes stranded or solid copper or aluminum conductors, and the terminal torque spec is 45 lb-in. Mersen does not require a special lug kit, the box lug is part of the block.
3) Does this Mersen block meet the 50kA SCCR my panel schedule calls for?
Yes. The 20601 carries a 50 kA short circuit current rating, which is what lets it be used in industrial power distribution panels, motor control centers and switchgear where a documented SCCR is required on the drawing.
4) Will the Mersen 20601 fuse block work in a solar PV DC array?
The Mersen 20601 is rated 250VAC/250VDC, which is well below the DC bus voltage of most photovoltaic strings. For PV service the Bussmann CHPV2 Series photovoltaic fuse block is a modular two-pole block rated 1000 Vdc. Use the Mersen block for 250V-class AC or DC distribution and the CHPV2 where the array voltage requires a 1000 Vdc rated holder.
5) What fuse block should be used instead of the Mersen 20601 if the circuit calls for Class R fuses?
The Mersen 20601 is built to accept Class H and K 250V power fuses in a 1-pole, 60A box lug block rated 250VAC/250VDC. Class R fuses have a rejection feature that will not seat in a Class H/K clip, so for that circuit the Littelfuse LFR60030-3CID Class R fuse block, rated 600V 30A, is the matching part. Confirm pole count and amp rating against the circuit before ordering, since the Mersen block is single-pole at 60A and the Littelfuse Class R block is a 3-pole 30A device.
6) What is the difference between the Mersen 20601 fuse block and a Class CC modular block like the Bussmann CHCC2DIU?
The Mersen 20601 takes Class H and K 250V power fuses, is 1-pole, 60A, and uses box lug connectors on a glass-filled polycarbonate body. The Bussmann CHCC2DIU is a 2-pole Class CC modular fuse block that is finger-safe and carries a blown-fuse indicator. Class CC fuses are physically much smaller than Class H/K fuses, so the two are not interchangeable; choose by the fuse class specified for the circuit and whether you need touch-safe construction and local indication.
7) What is the Mersen part number for the 60A single-pole Class H/K box lug block?
Mersen part number 20601. That is the 1-pole, 60A maximum, 250VAC/250VDC box lug block for Class H and K fuses.
8) Can I run 100A through this block with a smaller fuse in it?
No. 60A is the maximum fuse and circuit rating for the 20601, so it cannot be used on a 100A circuit. Size the block to the feeder, not just to the fuse you happen to have.
9) Is the Mersen 20601 finger-safe or does it leave live clips exposed?
It is an open-clip box lug block with clip-in fuse installation, not a touch-safe enclosed design. If your spec calls for finger-safe terminals, the Bussmann CHCC2DIU is a finger-safe Class CC modular block with blown-fuse indicator.
10) Can a fuse block be DIN rail mounted instead of screw mounted like the Mersen 20601?
The Mersen 20601 installs by direct screw mount, with fuses clipped in and terminals torqued to 45 lb-in. If the panel is laid out for DIN rail, the Littelfuse LFG60015-1SQDINR is a DIN rail mount Class G fuse block rated 600V 15A. The Littelfuse LD Series POWR-BLOKS block uses bolt-in mounting, which is another fixed-fastener approach like the Mersen block rather than a rail clip.
11) I need more than one pole in a single fuse block - what are the options next to the Mersen 20601?
The Mersen 20601 is a 1-pole block, so a three-phase circuit needs three of them or a multi-pole block. For multi-pole in one body, the Bussmann 3833 Series AGC fuse block is offered in 1 through 8-pole configurations, the Bussmann BCM603 Series is a two-pole modular block, and the Littelfuse LFR60030-3CID is a 3-pole Class R block. Note the fuse class differs on each, so verify the fuse called out on the drawing before substituting.
12) Is the Bussmann 3833 AGC fuse block a substitute for the Mersen 20601?
No. The Bussmann 3833 Series is an AGC fuse block, built for small glass-tube automotive-style AGC fuses, while the Mersen 20601 accepts Class H and K 250V power fuses at up to 60A with box lug terminals for stranded or solid copper or aluminum wire. They serve different ends of the current range and the fuse bodies are not compatible, so the 3833 is not a drop-in for a 60A Class H/K position.
13) Is the body on this fuse block rated for an industrial panel environment?
The insulator is glass filled polycarbonate with dielectric strength verified in excess of 2500V, and the fuse clips are tinplated copper for low-resistance contact. The construction is also RoHS compliant.
14) How does the Littelfuse LD Series POWR-BLOKS compare with the Mersen 20601 for a panelboard install?
Both are power fuse blocks for distribution panels. The Mersen 20601 is a 1-pole, 60A Class H/K block with box lug connectors, direct screw mounting, a 45 lb-in terminal torque, and a glass-filled polycarbonate insulator. The Littelfuse LD Series POWR-BLOKS block uses bolt-in mounting. The choice comes down to whether the enclosure is prepped for screw mounting or for bolted hardware, and on the fuse class the circuit specifies.
How fast can I get the Mersen 20601 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Mersen 20601 come with a warranty?
Absolutely. The Mersen 20601 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Mersen 20601?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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