Bussmann BMM603 Single-Pole Fu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$12.84
Bussmann BMM603 Single-Pole Fuse Block, 600V 30A

Bussmann BMM603 Single-Pole Fuse Block, 600V 30A

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Model: BMM603-1PQ

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

$12.84
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Bussmann BMM603-1S Eaton Series BMM Single-Pole Fuse Block, 600V 30A

The Bussmann BMM603-1S is an Eaton series BMM single-pole fuse block rated 600V and 30A, engineered for screw-type termination in Midget-class fuse applications. Built for panel mounting, this fuse block accepts wire sizes from #18-11 AWG Cu and is torque-rated at 20 lb-in for secure, code-compliant connections. Backed by a 200 kA short circuit rating and UL Recognized status, it is suited for demanding branch circuit protection where reliability and compact footprint matter.

Key Features

  • Voltage & Amperage Rating: Rated 600V and 30A for dependable branch circuit fuse protection.
  • Fuse Type: Midget-style fuse block designed to accept Midget-class fuses.
  • Screw Connection: Screw-type terminals accommodate wire sizes #18-11 AWG Cu, torqued to 20 lb-in for a secure termination.
  • Single-Pole Configuration: Single-pole design simplifies installation in single-circuit fuse applications.
  • Mounting Method: Panel-mount design for straightforward integration into enclosures and panelboards.
  • Short Circuit & Impulse Withstand: 200 kA short circuit rating and 200 kA impulse withstand voltage for robust fault protection.
  • Operating Temperature: Rated from -40 °C to 120 °C for use across a wide range of environmental conditions.
  • Compact Dimensions: Measures 3.7 in (height) x .8 in (width) x .8 in (depth) and weighs just .06 lb.

Certifications & Compliance

  • UL Recognized
  • RoHS Compliant

Technical Specifications

  • Accessories: CVR-CCM, CVRI-CCM
  • Amperage Rating: 30 A
  • Certifications: UL Recognized
  • Compliances: RoHS Compliant
  • Fuse Type: Midget
  • Impulse Withstand Voltage: 200 kA
  • Mounting Method: Panel
  • Operating Temperature Max: 120 °C
  • Operating Temperature Min: -40 °C
  • Product Height: 3.7 in
  • Product Length Depth: .8 in
  • Product Weight: .06 lb
  • Product Width: .8 in
  • Short Circuit Rating: 200 kA
  • Torque Rating: 20 lb-in
  • Voltage Rating: 600 V
  • Wire Size: #18-11 AWG Cu

Typical Applications

  • Branch Circuit Fuse Protection
  • Panelboards and Load Centers
  • Industrial Control Panels
  • Motor Control Circuits
  • OEM Equipment Protection

Why Bussmann?

Bussmann by Eaton fuse blocks are engineered for reliable, code-compliant circuit protection with a 200 kA short circuit rating and UL Recognized construction. The screw-type, single-pole BMM603-1S delivers consistent performance for professional electrical installations, and RoHS Compliant construction supports environmentally responsible specification. Choose Bussmann for dependable fuse block performance backed by proven Eaton engineering.

Manufacturer Resources

Product Specs

Compliances:
RoHS Compliant
Product Type:
Fuse Block
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuse Holders & Blocks

Bussmann BMM603-1PQ – Frequently Asked Questions

1) What is the difference between the BMM603-1S and BMM603-1PQ?
Termination, nothing else. The -1S is screw type, taking #18-11 AWG copper torqued to 20 lb-in. The -1PQ uses a pressure plate quick connect. Pick the screw version for field-wired panels where you want a torqued, inspectable connection; the PQ version suits OEM assembly work.
2) Can I land #12 THHN on this Bussmann Midget fuse block?
Yes. The screw terminals on the BMM603 are rated for #18 through #11 AWG copper, so #12 and #14 are both within range. Torque to 20 lb-in. Anything heavier than #11 AWG will not seat properly and you'd need a larger block.
3) Is a single-pole fuse block enough, or do I need three poles?
The BMM603 is single-pole, which covers one ungrounded conductor. For a three-phase motor branch circuit you need three poles, either three single-pole blocks ganged or a three-pole block such as the Littelfuse LFR60030-3CID, a 600V 30A Class R three-pole unit. Single-pole is the right choice for single-circuit control and OEM protection.
4) Can I use a Class G fuse block instead of the Bussmann BMM603?
Only if the circuit is specified for Class G fuses. The Littelfuse LFG60015-1SQDINR is a Class G block rated 600V 15A, so it differs from the BMM603 two ways: fuse class, since the BMM603 accepts Midget-class fuses, and current, since the BMM603 is rated 30A. Fuse blocks are dimensioned to one fuse class, so a Midget fuse will not seat correctly in a Class G block. Match the block to the fuse the drawing calls out.
5) What is the closest alternative to the Bussmann BMM603 if the panel needs a 600V 30A fuse block from another maker?
The Littelfuse LFR60030-3CID is a Class R fuse block rated 600V 30A, matching the BMM603 on voltage and amperage. Two differences matter before you swap: the BMM603 is a single-pole block that accepts Midget-class fuses, while the LFR60030-3CID is a three-pole block built around Class R fuses. If the circuit uses Midget fuses or only one pole is needed, stay with the BMM603; if you are protecting a three-phase circuit with Class R fuses, the Littelfuse block is the one that fits.
6) How much space do I need in the enclosure for a BMM603 fuse block?
Allow 3.7 x .8 x .8 inches for the block body itself, plus clearance above for fuse removal and bending room for the conductors. The .8 inch footprint is why these get used in tight industrial control panels where a Class R block won't fit.
7) Does the BMM603 fuse block have a finger-safe cover available?
Live-part shielding is handled by accessory covers CVR-CCM and CVRI-CCM, which are listed as the accessories for this block. The block itself ships without a cover, so order one separately if your panel needs the terminals shielded.
8) Will this fuse block hold up in an unheated outdoor industrial enclosure?
Operating range is -40 C to 120 C, so cold weather and high internal panel temperatures are both within spec. The block is UL Recognized and RoHS compliant. Note that it is a component rating, not an enclosure rating, so the NEMA protection has to come from the box you install it in.
9) What short circuit rating does the Bussmann BMM603 carry?
200 kA short circuit rating and 200 kA impulse withstand, which is what lets it sit on high available fault current services when the Midget fuse in it is appropriately rated. The fuse, not the block, sets the interrupting performance of the circuit.
10) Can I use the BMM603 on a 480V three-phase control circuit?
Yes, the voltage rating is 600V, which covers 480V and 240V systems. Current is capped at 30A per pole. For 480V three-phase you'll need one block per ungrounded conductor since it is a single-pole device.
11) What is the difference between the Bussmann BMM603 and the Littelfuse POWR-BLOKS LD series?
Mounting method is the clearest split. The Littelfuse LD series POWR-BLOKS fuse block uses bolt-in mounting, while the BMM603 is a panel-mount single-pole block that accepts Midget-class fuses and terminates #18-11 AWG Cu at 20 lb-in. Choose by how the block has to attach in the enclosure and by the fuse class the circuit is designed around.
How fast can I get the Bussmann BMM603-1PQ 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 Bussmann BMM603-1PQ come with a warranty?
Absolutely. The Bussmann BMM603-1PQ 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 Bussmann BMM603-1PQ?
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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