Mersen Class J Fuse Base, 600V...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$148.46
Mersen Class J Fuse Base, 600V 60A, 3-Pole

Mersen Class J Fuse Base, 600V 60A, 3-Pole

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Model: 60603J

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

$148.46
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Mersen 60603J Class J Fuse Base, 600V 60A, 3-Pole

The Mersen 60603J is a Class J fuse base rated 600V and 60A, built in a 3-pole configuration with a tin-plate aluminum box for reliable, code-compliant overcurrent protection. Designed for use with AJT, A4J, and HSJ Class J fuses, this fuse base carries a 200 kA short circuit current rating (SCCR) and is UL Listed and CSA Certified, meeting the requirements of UL4248 (formerly UL512) for demanding industrial and commercial electrical distribution applications.

Key Features

  • Ampere Rating: 60A maximum fuse rating for Class J fuse protection.
  • Voltage Rating: 600V AC/UL and 600V DC/UL for demanding power distribution circuits.
  • Durable Construction: Tin-plate aluminum box with a GFPC insulating body material for long-term reliability.
  • 3-Pole Configuration: Supports three-phase circuit protection in a single, compact fuse base.
  • Fuse Compatibility: Class J (600V) blocks designed for use with AJT, A4J, and HSJ fuses.
  • Installation: Clip-in fuse installation method with direct screw mounting, box wire connections, and a 45 lb-in torque rating.
  • Operating Range: Rated for operating and storage temperatures up to 80°C and down to -25°C at 50/60 Hz.
  • High SCCR: 200 kA short circuit current rating for enhanced fault-current protection.

Certifications & Compliance

  • UL Listed, Guide IZLT, File E52283
  • CSA Certified, Class 6225, File 32169
  • Meets the requirements of UL4248 (formerly UL512)

Technical Specifications

  • Ampere Rating: 60 A
  • Body Insulating Material: GFPC
  • Country Of Origin: MX
  • Frequency Hz: 50/60 Hz
  • Fuse Installation Method: Clip-in
  • Installation Mounting: Direct Screw Mount
  • Max Fuse Rating: 60 A
  • Max Operating Temp: 80 °C
  • Max Storage Temp: 80 °C
  • Min Storage Temp: -25 °C
  • Product Line: Class J Fuseholders - Class J
  • Rated Voltage Ac Ul: 600 V
  • Rated Voltage Dc Ul: 600 V
  • Short Circuit Current Rating Sccr: 200 kA
  • Torque Rating: 45 lb-in
  • Wire Connections: Box

Typical Applications

  • Industrial and Commercial Power Distribution Panels
  • Motor Control Centers and Switchgear
  • Three-Phase Circuit Overcurrent Protection
  • Panelboard and Load Center Fuse Mounting
  • Renovation and New Construction Electrical Systems

Why Mersen?

Mersen Class J fuse bases combine a durable tin-plate aluminum box with a GFPC insulating body to deliver dependable performance in demanding power distribution environments. Backed by UL Listing (Guide IZLT, File E52283) and CSA Certification (Class 6225, File 32169), plus a 200 kA SCCR rating, the 60603J is engineered for code-compliant, professional-grade electrical installations.

Manufacturer Resources

Mersen Product Catalog

Product Specs

Product Group:
Circuit Protection
Amperage Rating:
60A
Product Type:
Fuse Base
Listing:
UL Listed
Voltage Rating:
600V
Product Material:
GFPC
Department:
Electrical
Product Subgroup:
Fuse Holders & Blocks
Number Of Poles:
Three-pole

Mersen 60603J – Frequently Asked Questions

1) What is the SCCR of the Mersen 60603J fuse base, and is it UL Listed?
200 kA short circuit current rating, which is what lets it carry the available fault current in industrial switchgear and motor control centers. It is UL Listed under Guide IZLT, File E52283, CSA Certified under Class 6225, File 32169, and meets UL4248 (formerly UL512).
2) Can I use this Mersen fuse base on a three-phase 480V motor circuit?
Yes. It is a 3-pole base rated 600V AC and 600V DC at 50/60 Hz, so a 480V three-phase feeder or motor circuit is well within its rating, with one pole per phase. Maximum fuse size is 60A.
3) How does the Mersen Class J fuse base mount and terminate?
Direct screw mount to the panel or subpanel, with box-type wire connections torqued to 45 lb-in. No separate mounting kit or rail adapter is involved, so plan hole locations and conductor bend space in the enclosure before you set it.
4) What is the difference between the Mersen 60603J and 60608J fuse bases?
The clip material. 60603J uses tin-plated copper clips; 60608J uses tin-plate aluminum. Both are the same 600V, 60A, 3-pole Class J base otherwise. Copper clips are the usual choice where termination conductors are copper and you want matched metals at the connection.
5) I only need to protect a single-phase two-wire circuit. Is a 3-pole Class J base the right thing to buy?
A 3-pole base gives you three independent fused poles. For a two-wire single-phase circuit you would leave one pole unused, which works but wastes panel space and money. For single-phase work, order a 1-pole or 2-pole Class J base in the same 600V, 60A rating instead.
6) Does the Mersen 60603J come with fuses?
No. It is the fuse base only, the mounting block and clips. The Class J fuses (AJT, A4J or HSJ, sized at or below 60A) are ordered separately, and you choose the amp rating to suit the load you are protecting.
7) Will this fuse base hold up in a hot electrical room or an unheated outbuilding?
Operating and storage temperature tops out at 80 C, with storage down to -25 C. That covers a warm industrial electrical room and cold-weather storage. The body is GFPC (glass-filled polycarbonate type insulating material), which is what carries that temperature rating.
How fast can I get the Mersen 60603J 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 60603J come with a warranty?
Absolutely. The Mersen 60603J 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 60603J?
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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