Bussmann 450NHG3B NHG3 Series ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$607.08
Bussmann 450NHG3B NHG3 Series NH3 Fuse-Link, gL/gG, AC 690V, Live Gripping Lugs

Bussmann 450NHG3B NHG3 Series NH3 Fuse-Link, gL/gG, AC 690V, Live Gripping Lugs

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Model: 250NHG3B-690

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

$607.08
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Bussmann NHG3 Series NH3 Fuse-Link, gL/gG, AC 690V, Live Gripping Lugs

The Bussmann NHG3 Series NH3 Fuse-Link delivers reliable overcurrent protection for industrial power distribution systems, with this family available in amp ratings from 250A to 450A to match a range of circuit protection needs. Built to IEC 60269 and CE marked, the fuse-link carries a Class C gL/gG utilization category for combined cable protection and equipment protection, and is rated AC 690V with a breaking capacity of 120 kA and a 120 kAIC interrupt rating for demanding fault-current conditions. The square-body NH3 construction features live gripping lugs and a combination fuse status indicator that gives a clear dual visual read on fuse condition, simplifying maintenance and troubleshooting in industrial panels and switchgear.

Key Features

  • Amp Rating Range: Available from 250A to 450A to suit varying industrial circuit protection requirements.
  • NH3 Construction: Square-body NH3 fuse-link design built to IEC 60269 for standardized NH-style fuse-holder compatibility.
  • Class C gL/gG Rating: Utilization category gL/gG provides combined cable protection and equipment protection.
  • Voltage Rating: Rated AC 690V for use in higher-voltage industrial distribution systems.
  • High Breaking Capacity: 120 kA breaking capacity with a 120 kAIC interrupt rating for safe clearing of high fault currents.
  • Combination Fuse Indicator: Dual/combination fuse status indicator gives a quick visual check of fuse condition without removing the fuse.
  • Live Gripping Lugs: Live gripping lug contacts (not insulated metal gripping lugs) for secure engagement in the fuse holder.

Certifications & Compliance

  • CE Marked
  • IEC 60269 Compliant

Technical Specifications

  • Class: Class C gL/gG
  • Voltage Type: AC
  • Utilization Category: gL/gG (cable protection/equipment protection)
  • Breaking Capacity: 120 kA
  • Rated Switching Capacity: 120 kA
  • Interrupt Rating: 120 kAIC
  • Fuse Shape: Square body
  • Product Height: 86 mm
  • Application: industrial
  • Insulated Metal Gripping Lugs Imgl: No
  • Product Weight: 1139.333333 g
  • Construction: NH3
  • Compliances: CE Marked
  • Product Length Depth: 150 mm
  • Certifications: IEC 60269
  • Fuse Indicator: Combination fuse status indicator

Typical Applications

  • Industrial Power Distribution Systems
  • Cable and Equipment Protection
  • Motor and Feeder Circuit Protection
  • Switchgear and Panelboard Fuse Protection

Why Bussmann?

Bussmann NH3 fuse-links are engineered to IEC 60269 and CE marked for verified compliance in industrial electrical systems. The combination fuse status indicator and live gripping lug design support fast, reliable field inspection and installation, while the 120 kA breaking capacity and 120 kAIC interrupt rating deliver dependable protection against high fault currents. For gL/gG cable and equipment protection across a 250A-450A rating range, the Bussmann NHG3 Series is built for demanding industrial applications.

Manufacturer Resources

Product Specs

Product Group:
Fuses
Class:
Class C gL/gG
Voltage Type:
AC
Utilization Category:
gL/gG (cable protection/equipment protection)
Breaking Capacity:
120 kA
Rated Switching Capacity:
120 kA
Product Type:
Fuse
Interrupt Rating:
120 kAIC
Fuse Shape:
Square body
Product Height:
86 mm
Product Details:
fuse
Application:
industrial
Insulated Metal Gripping Lugs Imgl:
No
Product Weight:
1139.333333 g
Product Subgroup:
Other Fuses
Construction:
NH3
Compliances:
CE Marked
Product Length Depth:
150 mm
Department:
Electrical
Certifications:
IEC 60269
Fuse Indicator:
Combination fuse status indicator
Series:
NHG3
Voltage Rating:
690V AC
Amperage Rating:
250A-450A
Configuration:
Class C gL/gG
Standards:
IEC 60269

Bussmann 250NHG3B-690 – Frequently Asked Questions

1) Will a Bussmann NHG3 fuse-link fit an NH3 size fuse holder or switch-disconnector?
Yes. The NHG3 Series is a square-body NH3 construction fuse-link built to IEC 60269, so it drops into any standard NH size 3 holder, fuse base, or switch-fuse. Body height is 86 mm and length/depth is 150 mm. It will not fit NH1 or NH2 gear, since blade centres and body size differ between NH sizes.
2) Can I use a 690V AC NH3 gG fuse on a 400V or 480V system?
Yes. The NHG3 fuse-link is rated 690V AC, and a fuse rated above the system voltage is acceptable on AC, so it works on 400V and 480V three-phase distribution. What you cannot do is apply it above 690V AC, and it is an AC-rated device only, so do not use it on a DC bus.
3) What does the gL/gG class on this Bussmann NH3 fuse actually protect?
gL/gG is the general-purpose utilization category for combined cable and equipment protection, so the NHG3 fuse-link handles feeder and cable overload plus short-circuit duty in distribution panels and switchgear. It is a full-range general-purpose element, not an aM motor-rated link that only covers short circuit and relies on an overload relay for thermal protection. If you are protecting a motor starter circuit where the overload is handled separately, an aM class link is the usual choice instead.
4) Is 120 kA breaking capacity enough for my industrial switchgear fault level?
The NHG3 fuse-link is rated 120 kA breaking capacity with a 120 kAIC interrupt rating at 690V AC, which covers the available fault current at almost any LV industrial service or switchboard fed from a typical distribution transformer. Compare it against the prospective short-circuit current calculated at the fuse base, not at the load.
5) Does the NHG3B have insulated gripping lugs, and does that affect how I change it?
No, these are live gripping lugs, not insulated metal gripping lugs (IMGL). The lug tabs are at line potential, so the fuse must be pulled with the switch or holder isolated, and insulated gloves plus an NH fuse puller are the normal practice. If your site standard requires insulated lugs for live-side handling, specify an IMGL version instead.
6) What amp ratings does the Bussmann NHG3B NH3 fuse-link come in?
The NHG3 family spans 250A to 450A. Orderable ratings are 250A as part number 250NHG3B-690 and 450A as part number 450NHG3B. Pick the rating from your cable ampacity and downstream device coordination, not from the switch size, since an NH3 holder accepts the whole range.
7) Can maintenance tell if this NH3 fuse has blown without pulling it out of the holder?
Yes. Each NHG3 link carries a combination fuse status indicator, giving a dual visual read on fuse condition from the front of the panel. That saves opening the disconnect and testing links one at a time when a phase drops on a feeder.
8) Is this Bussmann NH3 fuse approved for use outside Europe, and what standards does it meet?
The NHG3 fuse-link is built to IEC 60269 and CE marked, which is the standard set used for NH square-body links in IEC-based installations worldwide. If your specification calls for a UL 248 Class J, L, or RK fuse for a North American listed panel, an IEC NH link is not a substitute for that requirement.
9) How heavy is a 450A NH3 fuse-link, and does that matter for shipping or handling a set of three?
Each NHG3 link weighs about 1139 g, so a three-phase set runs roughly 3.4 kg. Worth knowing when you are stocking spares on a service cart or calculating freight on a full-panel refuse.
How fast can I get the Bussmann 250NHG3B-690 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 250NHG3B-690 come with a warranty?
Absolutely. The Bussmann 250NHG3B-690 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 250NHG3B-690?
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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