Bussmann 50NHM000B NH000 Fuse-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$153.10
$120.30
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Bussmann 50NHM000B NH000 Fuse-Link, 50A aM, 500V AC, IEC

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Model: 50NHM000B

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

$153.10
$120.30
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Bussmann 50NHM000B NH000 Fuse-Link, 50A aM, 500V AC, IEC

The Bussmann 50NHM000B is a low-voltage NH000 fuse-link rated 50 A at AC 500 V, engineered for demanding industrial overcurrent protection. Manufactured to IEC 60269 with a Class aM (switchgear protection) utilization category, this square-body fuse-link is built for motor circuit and switchgear protection where high fault currents are a concern. A combination fuse status indicator gives installers a fast visual check of fuse condition, while the 120 kA breaking capacity delivers dependable performance in demanding industrial applications.

Key Features

  • Amperage Rating: 50 A rated fuse-link delivers reliable overcurrent protection for industrial power circuits.
  • Voltage Rating: Rated AC 500 V for low-voltage industrial power distribution and switchgear systems.
  • NH000 Square Body: NH000 size, square-body construction for compatibility with standard NH-type fuse bases and disconnects.
  • Class aM Utilization Category: Class aM (switchgear protection) rating per IEC 60269 for motor circuit and switchgear protection duty.
  • Breaking Capacity: 120 kA breaking capacity (120 kAIC interrupt rating) supports safe operation in high fault-current environments.
  • Rated Switching Capacity: 120 A rated switching capacity for reliable circuit isolation.
  • Dual Fuse Status Indicator: Combination fuse status indicator provides quick visual confirmation of fuse condition.
  • Industrial Application: Designed for industrial application environments that demand dependable, code-compliant overcurrent protection.

Certifications & Compliance

  • IEC 60269 Compliant
  • CE Marked

Technical Specifications

  • Application: industrial
  • Breaking Capacity: 120 kA
  • Certifications: IEC 60269
  • Class: Class aM
  • Compliances: CE Marked
  • Fuse Indicator: Combination fuse status indicator
  • Fuse Shape: Square body
  • Insulated Metal Gripping Lugs (IMGL): No
  • Interrupt Rating: 120 kAIC
  • Product Height: 51 mm
  • Product Length Depth: 79 mm
  • Product Weight: 130.6666667 g
  • Product Width: 21 mm
  • Rated Switching Capacity: 120 A
  • Utilization Category: aM (switchgear protection)
  • Voltage Type: AC

Typical Applications

  • Motor Circuit and Switchgear Protection
  • Industrial Power Distribution Panels
  • NH-Type Fuse Bases and Disconnect Switches
  • Low-Voltage Industrial Electrical Systems
  • Facilities Requiring High Breaking Capacity Protection

Why Bussmann?

Bussmann fuse-links are built to IEC 60269 standards with CE marking, giving electrical professionals confidence in code-compliant overcurrent protection. The 50NHM000B's Class aM rating, 120 kA breaking capacity, and combination fuse status indicator combine to deliver dependable, easy-to-verify protection for demanding industrial motor and switchgear circuits.

Manufacturer Resources

Product Specs

Amperage Rating:
50 A
Application:
industrial
Breaking Capacity:
120 kA
Certifications:
IEC 60269
Class:
Class aM
Compliances:
CE Marked
Construction:
NH000
Fuse Indicator:
Combination fuse status indicator
Fuse Shape:
Square body
Insulated Metal Gripping Lugs Imgl:
No
Interrupt Rating:
120 kAIC
Product Height:
51 mm
Product Length Depth:
79 mm
Product Weight:
130.6666667 g
Product Width:
21 mm
Rated Switching Capacity:
120 A
Utilization Category:
aM (switchgear protection)
Voltage Rating:
500 V
Voltage Type:
AC
Product Group:
Fuses
Department:
Electrical
Product Subgroup:
Other Fuses
Product Type:
fuse
Product Details:
fuse

Bussmann 50NHM000B – Frequently Asked Questions

1) What is the difference between a Class aM and a gG fuse-link, and which do I need for a motor circuit?
Class aM is a partial-range fuse-link for switchgear and motor circuit protection: it handles the short-circuit end of the job and is meant to sit behind a separate overload device such as a motor overload relay or thermal protection. The Bussmann 50NHM000B is an aM fuse-link (utilization category aM, switchgear protection) rated 50 A, so it is the right choice on a motor starter where an overload relay is already doing the thermal work. If nothing else in the circuit provides overload protection, a general-purpose gG type is what you want instead, because aM will not clear a sustained low-level overload.
2) Can I use this 500V AC fuse on a 480V industrial system?
Yes. Rated 500 V AC, the 50NHM000B covers 480 V and 400/415 V three-phase industrial distribution. It is an AC-only rating, so don't apply it to a DC circuit expecting the same performance, and don't use it above 500 V AC.
3) Is 120 kA breaking capacity enough for my switchgear with a high available fault current?
The interrupting rating is 120 kA (120 kAIC) at the rated 500 V AC, which covers the prospective short-circuit current at most low-voltage industrial service and distribution points. Compare it against the available fault current calculated at the point of installation; as long as that figure is at or below 120 kA, the fuse-link is adequately rated.
4) How do I tell if this NH fuse has blown without pulling it out of the holder?
It carries a combination fuse status indicator, so a visual check at the fuse tells you whether the element has operated. That saves de-energizing and extracting each link in a three-phase set to find the one that cleared, which is the usual MRO time sink on NH fuse switchgear.
5) What exact part number do I order for a 50 amp NH000 aM fuse-link from Bussmann?
Bussmann MPN 50NHM000B. The number breaks down as 50 A, NH size 000, M for the aM motor and switchgear class. Each unit weighs about 131 g, so a set of three for a three-phase disconnect is a light order.
6) What is the rated switching capacity on this fuse-link and why does it matter?
Rated switching capacity is 120 A. That figure relates to the current the assembly can isolate when the link is used in a fuse-switch arrangement, and it sits well above the 50 A rating of the element itself, which is what you want for reliable circuit isolation in an industrial panel.
How fast can I get the Bussmann 50NHM000B 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 50NHM000B come with a warranty?
Absolutely. The Bussmann 50NHM000B 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 50NHM000B?
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 50NHM000B from ZenSupply?
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