Mersen 62003J Class J Fuse Blo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,425.89
Mersen 62003J Class J Fuse Block, 200A 3-Pole, 600VAC/600VDC

Mersen 62003J Class J Fuse Block, 200A 3-Pole, 600VAC/600VDC

(No reviews yet) Write a Review

Model: 62003J

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

$1,425.89
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Mersen 62003J Class J Fuse Block, 200A 3-Pole, 600VAC/600VDC

The Mersen 62003J Class J Fuse Block delivers 200A overcurrent protection at 600VAC/600VDC in a 3-Pole configuration for demanding industrial and commercial power distribution. Built from glass-filled polycarbonate for mechanical strength and electrical insulation, this fuse block uses a clip-in installation method for secure Class J fuse retention and easy maintenance, backed by a 200 kA short circuit current rating (SCCR) for enhanced fault protection.

Key Features

  • 200A Current Rating: Handles high-current loads up to 200 amperes for demanding electrical applications and equipment protection.
  • Dual Voltage Capability: Rated 600VAC and 600VDC, supporting both AC and DC system installations.
  • Class J Fuse Compatibility: Clip-in installation method ensures secure fuse retention and simplified maintenance.
  • 200 kA Short Circuit Rating: Delivers exceptional fault current interruption capability for enhanced system protection.
  • Glass-Filled Polycarbonate Construction: Durable insulating body material offers strong mechanical and electrical insulation properties.
  • 3-Pole Configuration: Accommodates three-phase power distribution with individual fuse protection per phase conductor.
  • Direct Screw Mount Design: Secure panel or enclosure mounting with a 375 lb-in torque rating for reliable connections.

Certifications & Compliance

  • RoHS Compliant

Technical Specifications

  • Ac Or Dc: AC/DC
  • Ampere Rating: 200 A
  • Body Insulating Material: Glass Filled Polycarbonate
  • Frequency Hz: 50/60 Hz
  • Fuse Class: Class J
  • Fuse Installation Method: Clip-in
  • Installation Mounting: Direct Screw Mount
  • Max Fuse Rating: 200 A
  • Number Of Poles: 3-Pole
  • Product Height: 2.9 in
  • Product Length: 6.13 in
  • Product Weight: 4.9 lb
  • Product Width: 9.63 in
  • Rated Voltage Ac Ul: 600 V
  • Rated Voltage Dc Ul: 600 V
  • Rohs Compliant: Yes
  • Short Circuit Current Rating Sccr: 200 kA
  • Torque Rating: 375 lb-in

Typical Applications

  • Industrial Motor Control Centers
  • Commercial Power Distribution Panels
  • Manufacturing Equipment Protection
  • HVAC System Overcurrent Protection
  • Process Control and Automation Systems
  • Electrical Service Entrance Applications

Why Mersen?

Mersen fuse blocks deliver proven reliability through RoHS compliant construction and precision engineering. The robust glass-filled polycarbonate body and 375 lb-in torque rating support long-term durability, while the 200 kA SCCR provides exceptional protection capability for critical 600VAC/600VDC, 200A, 3-Pole applications.

Manufacturer Resources

Mersen Product Catalog

Product Specs

Product Type:
Fuse Block
Product Material:
Glass Filled Polycarbonate
Voltage Rating:
600V
Amperage Rating:
200A
Configuration:
3-Pole
Connection Type:
Clip-in
Listing:
RoHS Compliant
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuse Holders & Blocks
Product Height:
2.9 in
Product Weight:
4.9 lb
Product Width:
9.63 in
Product Length:
6.13 in
Number Of Poles:
Three-pole

Mersen 62003J – Frequently Asked Questions

1) Can I use the Mersen 62003J on a 600 VDC circuit, or is it AC only?
Both. The block is rated 600 V AC and 600 V DC, at 50/60 Hz on the AC side, so it works in DC drive, battery, and process power applications as well as three-phase AC distribution. For a PV-specific block at higher DC voltage, the Bussmann CHPV2 Series photovoltaic block is rated 1000 Vdc.
2) Can a Class R fuse block be used in place of the Mersen 62003J Class J block?
No. The Mersen 62003J is built for Class J fuses with clip-in retention, and Class J bodies use a different length and ferrule dimension than Class R, so the fuse will not seat in the wrong block. If the circuit is actually specified for Class R fuses, the Littelfuse LFR60030-3CID is a Class R block rated 600V at 30A. Note the amperage gap as well: the Mersen 62003J carries a 200A rating, so the Class R part is a substitute only where the load is far smaller and the drawing calls for Class R.
3) I only need a small control circuit fuse on a DIN rail, not a 200A block. What should I use instead of the Mersen 62003J?
For a small control circuit, the Littelfuse LFG60015-1SQDINR is a Class G fuse block rated 600V at 15A with DIN rail mounting. The Mersen 62003J is a 200A 3-pole Class J block with direct screw mounting to a panel or enclosure, which is sized for feeder and motor branch duty rather than control power. Confirm which fuse class the control transformer secondary is specified for, since Class G and Class J fuses are not interchangeable in the same block.
4) Is the Mersen 62003J suitable for a solar PV DC combiner, or is there a better block?
For photovoltaic DC work, the Bussmann CHPV2 series is the purpose-built option, a modular two-pole photovoltaic fuse block rated 1000 Vdc. The Mersen 62003J is rated 600VAC and 600VDC in a 3-pole arrangement, so it is limited to DC systems at or below 600V and does not cover the 1000 Vdc string voltages common in PV arrays. Use the 62003J where the DC bus stays within 600V and Class J fusing is specified.
5) Is the Mersen 62003J DIN rail mount?
No. It is a direct screw mount block, fastened flat to the panel or enclosure backplate. If your build is standardized on rail, the Littelfuse LFG60015-1SQDINR is a DIN rail mount block, though it is a 15 A Class G device, not a 200 A Class J one. The Littelfuse LD Series POWR-BLOKS use bolt-in mounting.
6) What torque do I use on the lugs of the Mersen 62003J?
375 lb-in is the torque rating for the connections on this block. Use a torque wrench on the terminals at that value, and re-check after the first heat cycle on a 200 A feeder.
7) Do I need one block per phase, or does the 62003J cover all three?
One block covers all three. The 62003J is a 3-pole assembly with an individual Class J fuse per phase conductor, so a single unit handles a three-phase feeder or a three-phase motor circuit. No ganging of single-pole blocks required.
8) Can I run fuses smaller than 200A in the Mersen 62003J?
Yes, within the Class J family. The block's maximum fuse rating is 200 A, and Class J fuses in the 110 to 200 A ampere range share the same body dimensions, so anything at or below 200 A in that dimensional group clips in. Sizes below 110 A use smaller Class J bodies and need a block sized for that range.
9) What is the difference between the Mersen 62003J and the Littelfuse POWR-BLOKS LD series?
The connection method is the main difference. The Mersen 62003J holds its Class J fuses with clip-in retention and mounts to the panel with direct screws, while the Littelfuse LD series POWR-BLOKS uses bolt-in mounting. Bolt-in fuse bodies and clip-style bodies are not cross-compatible, so the choice is driven by which fuse style the panel is stocked and specified for.
10) Is the Mersen 62003J body material suitable for a hot motor control center?
The body is glass-filled polycarbonate, chosen for mechanical strength and dielectric insulation between the three poles. It is the standard body material for Class J blocks in MCC and industrial distribution duty, and the unit is listed for industrial motor control centers and manufacturing equipment protection.
11) Is the Mersen 62003J RoHS compliant for an export build?
Yes, the 62003J is RoHS compliant, which is what most OEM panel builds shipping into the EU need on the bill of material.
12) What is the exact part number to order this Mersen Class J block?
Order Mersen 62003J. The 6 prefix denotes the Class J block family, 200 is the ampere rating, and 3 is the pole count, so a 100 A two-pole version of the same family carries a different number entirely.
How fast can I get the Mersen 62003J 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 62003J come with a warranty?
Absolutely. The Mersen 62003J 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 62003J?
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 62003J from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
!