Mersen Class J Fuse Base, 600V...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$341.44
Mersen Class J Fuse Base, 600V 100A 3-Pole Tin-Plated Box Connector

Mersen Class J Fuse Base, 600V 100A 3-Pole Tin-Plated Box Connector

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Model: 61008J

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

$341.44
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Mersen Class J Fuse Base, 600V 100A 3-Pole Tin-Plated Box Connector

The Mersen Class J Fuse Base is a 600V, 100A, 3-pole fuseholder engineered for use with AJT, A4J, and HSJ Class J fuses, featuring high-conductivity tin-plated copper clips with spring-reinforced construction and a box-type wire connector suited to stranded or solid copper or aluminum conductors. Built around a molded glass-filled polycarbonate (GFPC) insulating body verified to a dielectric strength in excess of 2500V, this fuse base is CSA certified and UL listed, making it a dependable choice for industrial and commercial power distribution equipment where consistent, code-compliant fuse protection is required. The 3-pole configuration allows multiple circuits to be protected from a single mounted assembly, and the reinforced clip design is built to maintain firm fuse contact under demanding load and vibration conditions over the life of the installation.

Key Features

  • Amperage Rating: 100A maximum fuse rating for Class J fuseholder applications.
  • Voltage Rating: 600V AC/DC rated for use with AJT, A4J, and HSJ Class J fuses.
  • Pole Configuration: 3-pole design for multi-conductor circuit protection in a single assembly.
  • Wire Connection: Box connector with spring-reinforced clip accommodates a wide range of stranded or solid copper or aluminum conductors.
  • Durable Construction: High-conductivity tin-plated copper clips paired with a molded glass-filled polycarbonate (GFPC) insulating body for long-term reliability.
  • Torque Rating: 120 lb-in torque rating supports secure, code-compliant terminations.
  • Operating Temperature: Rated for a maximum operating and storage temperature of 80°C, with a minimum storage temperature of -25°C.
  • Short Circuit Current Rating: 200kA SCCR suited to high fault-current industrial environments.

Certifications & Compliance

  • CSA Certified, Class 6225, File 32169
  • Meets UL4248 Requirements (Formerly UL512)
  • UL Listed, Guide IZLT, File E52283

Technical Specifications

  • Country Of Origin: MX
  • Frequency: 50/60 Hz
  • Installation Mounting: Direct Screw Mount
  • Fuse Installation Method: Clip-in
  • Storage Temperature Range: -25°C to 80°C
  • Product Line: Class J Fuseholders - Class J

Typical Applications

  • Industrial and Commercial Power Distribution Panels
  • Motor Control Centers and Switchgear Assemblies
  • Class J Fuse Protection for AJT, A4J, and HSJ Fuses
  • Multi-Pole Segmented Fuse Block Assemblies
  • High Fault-Current Circuit Protection Applications

Why Mersen?

Mersen Class J fuse bases combine high-conductivity tin-plated copper clips, spring-reinforced clip design, and a GFPC insulating body verified to over 2500V dielectric strength for dependable, code-compliant fuse protection. Backed by CSA certification and UL listing to UL4248, this fuse base delivers the reliability and consistent performance professional electricians expect for critical power distribution work.

Manufacturer Resources

Mersen Product Catalog

Product Specs

list_batch:
MERSEN-20260825
Product Type:
Fuse Base
Voltage Rating:
600V
Amperage Rating:
100A
Configuration:
3-Pole
Connection Type:
Box with Reinforced Clip
Product Finish:
Tin-Plated
Product Material:
GFPC
Listing:
UL Listed
Standards:
CSA
Series:
Class J
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuse Holders & Blocks

Mersen 61008J – Frequently Asked Questions

1) Which fuses fit the Mersen 61008J Class J fuse base?
The 61008J is built for Class J fuses up to 100A at 600V, specifically Mersen AJT, A4J and HSJ. Fuses drop in with a clip-in method, so no bolting is needed. Class J fuses have their own unique dimensions, so an RK5 or Class T fuse will not seat in these clips.
2) Can I use aluminum conductors on this Mersen fuse base, or copper only?
Both. The 61008J uses a box-type connector with a spring-reinforced clip that accepts stranded or solid copper or aluminum conductors. Terminations torque to 120 lb-in.
3) Is this 3-pole Class J fuse base rated for a high fault current industrial panel?
Yes. The 61008J carries a 200kA short circuit current rating, which covers most industrial service and motor control center locations. The glass-filled polycarbonate body is verified above 2500V dielectric strength on a 600V AC/DC rated holder.
4) Does the Mersen 61008J fuse base carry UL and CSA approvals for a code inspection?
It is UL Listed under Guide IZLT, File E52283, and meets UL4248 (formerly UL512). CSA certification is Class 6225, File 32169. That covers both US and Canadian installations.
5) How does this Class J fuse base mount in a panel or enclosure?
Direct screw mount to the panel or subpanel surface. It is a 3-pole assembly, so one mounted unit protects all three phases rather than needing three single-pole blocks lined up and spaced.
6) Will this fuse base hold up in a hot motor control center or a cold outdoor cabinet?
Operating and storage maximum is 80 degrees C, with a minimum storage temperature of -25 degrees C. Above 80 C ambient it is outside its rating. The spring-reinforced tin-plated copper clips are built to keep contact pressure under vibration, which matters in MCC and switchgear service.
7) Can I use a 100A Class J fuse base on a 240V or 480V circuit?
Yes. The 61008J is rated 600V, and a fuse holder may be applied at or below its voltage rating, so 208, 240 and 480V systems are all within it. Frequency rating is 50/60 Hz, and the holder is rated for AC or DC.
8) What is the insulating body on this Mersen fuse base made of?
Molded glass-filled polycarbonate, tested past 2500V dielectric strength. The clips themselves are tin-plated copper for conductivity and corrosion resistance at the fuse contact.
How fast can I get the Mersen 61008J 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 61008J come with a warranty?
Absolutely. The Mersen 61008J 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 61008J?
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
Why buy the Mersen 61008J from ZenSupply?
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