Bussmann NNB Dummy Fuse Neutra...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$45.94
Bussmann NNB Dummy Fuse Neutral Block, MMB Series

Bussmann NNB Dummy Fuse Neutral Block, MMB Series

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Model: NNB

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

$45.94
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Bussmann NNB Dummy Fuse Neutral Block, MMB Series

The Bussmann NNB is a dummy fuse neutral designed for use in Eaton's Bussmann series MMB modular fuse block assemblies. Rather than housing a fusible element, the NNB functions as a solid, non-fusible link that occupies the neutral pole position, maintaining a continuous current path through the neutral conductor while the associated line poles carry the actual fuses. This allows an MMB series fuse block to be fully populated across all poles, including the neutral, without introducing overcurrent protection where it is not required by the circuit design.

Key Features

  • Non-Fusible Design: The NNB is built as a dummy fuse, meaning it carries current as a solid link rather than opening under fault conditions, preserving continuity on the neutral pole.
  • MMB Series Compatibility: Engineered to fit directly into Eaton's Bussmann series MMB modular fuse block system alongside the line poles' fusible components.
  • Neutral Pole Application: Purpose-built for the neutral position in multi-pole fuse block assemblies where overcurrent protection is not applied.
  • Simplifies Block Configuration: Lets installers fully populate an MMB series fuse block with a consistent, uniform footprint across all poles, including positions that do not carry a fuse.
  • Bussmann Reliability: Manufactured under the Bussmann brand, part of Eaton's established line of fuse block and overcurrent protection accessories.

Typical Applications

  • Eaton Bussmann Series MMB Modular Fuse Block Assemblies
  • Panelboard and Distribution Equipment Requiring Neutral Pole Continuity
  • Multi-Pole Fuse Holder Systems
  • Commercial and Industrial Electrical Distribution Equipment
  • Fuse Block Retrofits and Replacement Parts Stocking

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Why Bussmann?

Bussmann, part of Eaton, is a long-established name in circuit protection components, and the NNB dummy fuse neutral reflects that same attention to system compatibility. By providing a dedicated, purpose-built neutral link for the MMB series fuse block, Bussmann helps ensure that every pole position, fused or not, maintains a secure and reliable connection. For electricians and panel builders standardizing on Eaton's Bussmann series MMB platform, the NNB is the correct accessory for completing the neutral pole without compromising the integrity of the assembly.

Manufacturer Resources

Product Specs

list_batch:
BUSS-20260919
Product Type:
Dummy Fuse
Series:
MMB
Department:
Electrical
Product Subgroup:
Fuse Holders & Blocks
Product Group:
Circuit Protection
Product Width:
0.37 in
Product Length:
0.37 in
Product Height:
1.46 in
Product Weight:
0.5 lb

Bussmann NNB – Frequently Asked Questions

1) What does a Bussmann NNB dummy fuse actually do in a fuse block?
The NNB is a solid, non-fusible link, not a fuse. It drops into the neutral pole position of an Eaton Bussmann MMB series modular fuse block and carries current straight through, so the neutral conductor stays continuous while the line poles hold the real fuses. It will not open under fault conditions, which is exactly the point: you get a populated neutral pole without adding overcurrent protection where the circuit design does not call for it.
2) Will the Bussmann NNB fit any fuse block, or only the MMB series?
Only the Eaton Bussmann MMB series modular fuse block system. The NNB is built to drop into that platform alongside the fusible components in the line poles. If your block is a different Bussmann family or another brand's holder, this is not the neutral link for it.
3) Can I just leave the neutral pole empty instead of buying an NNB?
An empty pole leaves the neutral path broken, which is the problem the NNB solves. Installed, it gives you a continuous current path through the neutral and a consistent footprint across every pole of the MMB block, fused or not. That is what lets a panel builder populate all poles uniformly rather than leaving a gap in the assembly.
4) Is the NNB a fuse I need to size to my circuit amperage?
No sizing is involved. The NNB has no fusible element at all, so there is no amp rating to match to your line fuses. You select your overcurrent protection on the line poles and use the NNB purely to complete the neutral position.
5) I'm restocking MRO spares for Bussmann MMB fuse blocks. What part number do I order for the neutral link?
Order Bussmann NNB. That is the manufacturer part number for the dummy fuse neutral used in the MMB series, and it is the only model offered under it, so there are no finish, size, or rating options to specify. It is a common spares item for MMB block retrofits and replacement parts stocking.
6) Where is a Bussmann NNB neutral link typically used?
It shows up in multi-pole fuse holder systems and in panelboard and distribution equipment where the neutral pole has to stay continuous, including commercial and industrial electrical distribution gear. Panel builders standardizing on the Eaton Bussmann MMB platform use it to finish out the neutral position on every assembly.
How fast can I get the Bussmann NNB 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 NNB come with a warranty?
Absolutely. The Bussmann NNB 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 NNB?
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 Bussmann NNB from ZenSupply?
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