Bussmann 315NHG3B Class NHG3 N...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$684.81
Bussmann 315NHG3B Class NHG3 NH Fuse, 690V, Class C gL/gG

Bussmann 315NHG3B Class NHG3 NH Fuse, 690V, Class C gL/gG

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Model: 315NHG3B-690

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

$684.81
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Bussmann 315NHG3B Class NHG3 NH Fuse, 690V, Class C gL/gG

The Bussmann 315NHG3B is part of the Eaton Bussmann series of low-voltage NH fuses, engineered for reliable overcurrent protection in industrial power distribution systems. Rated 690V with a 120 kAIC interrupt rating, this Class NHG3 fuse delivers Class C gL/gG utilization for both cable protection and equipment protection. It features a ceramic body with square-body knife blade contact, a live gripping lug, blade end connection, and a combination fuse status indicator for quick visual confirmation of fuse condition. This Class NHG3 fuse family is available in 315A, 400A, and 500A ratings to match a range of circuit protection requirements.

Key Features

  • Amp Rating Options: Available in 315A, 400A, and 500A ratings within the Class NHG3 family for flexible circuit protection sizing.
  • Voltage Rating: 690V for low-voltage industrial power distribution systems.
  • Interrupt Rating: 120 kAIC for dependable performance under high fault-current conditions.
  • Utilization Category: Class C gL/gG rating provides both cable protection and equipment protection.
  • Ceramic Body Construction: Square-body design with ceramic housing and knife blade contact for a secure, durable fit.
  • Live Gripping Lug & Blade End Connection: Blade end connection with live gripping lug supports secure mounting in NH fuse bases.
  • Combination Fuse Status Indicator: Built-in indicator provides quick visual confirmation of fuse condition.
  • Frequency Rating: Rated for AC systems from 45 Hz to 62 Hz.

Certifications & Compliance

  • UL Listed
  • RoHS Compliant

Technical Specifications

  • Voltage Type: AC
  • Product Width: 71 mm
  • Fuse Type: Square body with knife blade contact
  • Frequency Rating Min: 45 Hz
  • Utilization Category: gL/gG (cable protection/equipment protection)
  • Packaging Type: Standard
  • Product Height: 86 mm
  • Application: industrial
  • Insulated Metal Gripping Lugs Imgl: No
  • Item Quantity: 3
  • Construction: NH3
  • Compliances: RoHS Compliant
  • Product Length Depth: 150 mm
  • Certifications: UL Listed
  • Frequency Rating Max: 62 Hz

Typical Applications

  • Industrial Electrical Power Distribution
  • Cable and Equipment Protection (gL/gG Applications)
  • Panelboard and Switchgear Circuit Protection
  • Motor and Feeder Circuit Overcurrent Protection
  • Commercial and Industrial NH Fuse Base Systems

Why Bussmann?

Bussmann, part of the Eaton series of low-voltage protection products, builds this Class NHG3 NH fuse with a durable ceramic body, knife blade contact, and live gripping lug for dependable performance in demanding industrial environments. UL Listed and RoHS compliant, it delivers code-compliant, reliable overcurrent protection that professionals can count on for critical circuit protection applications.

Manufacturer Resources

Product Specs

Product Group:
Fuses
Class:
Class C gL/gG
Voltage Type:
AC
Product Width:
71 mm
Fuse Type:
Square body with knife blade contact
Special Features:
Live gripping lug
Frequency Rating Min:
45 Hz
Utilization Category:
gL/gG (cable protection/equipment protection)
Packaging Type:
Standard
Breaking Capacity:
120 kA
Rated Switching Capacity:
120 kA
Connection:
Blade end
Product Type:
Fuse
Interrupt Rating:
120 kAIC
Product Height:
86 mm
Product Details:
fuse
Application:
industrial
Insulated Metal Gripping Lugs Imgl:
No
Item Quantity:
3
Product Subgroup:
Other Fuses
Construction:
NH3
Compliances:
RoHS Compliant
Product Length Depth:
150 mm
Department:
Electrical
Certifications:
UL Listed
Frequency Rating Max:
62 Hz
Fuse Indicator:
Combination fuse status indicator
Product Material:
Ceramic
Voltage Rating:
690V
Amperage Rating:
315A-500A
Listing:
UL Listed
Connection Type:
Blade
Series:
NHG3

Bussmann 315NHG3B-690 – Frequently Asked Questions

1) Will the Bussmann NHG3B fuse fit an NH3 size fuse base?
Yes. The NHG3B is built to NH3 construction, so it drops into an NH size 3 fuse base or switch disconnector. It is a square body knife blade fuse with blade end connection, and it measures 150 mm long, 86 mm high, 71 mm wide. If your holder is an NH1 or NH2 size, this body will not seat.
2) Can I use a Bussmann 315NHG3B on a 480V or 600V industrial system?
The NHG3B carries a 690V AC rating, so it covers 480V and 600V AC distribution as well. It is an AC-only rating, rated for 45 Hz to 62 Hz, which covers both 50 Hz and 60 Hz systems. Do not apply it to DC circuits on the strength of this rating.
3) What does the gL/gG rating on this NH fuse actually mean for my circuit?
gL/gG is a general purpose, full range characteristic: the fuse protects across the whole range from small overloads up to full short circuit, which makes it suitable for both cable protection and equipment protection on feeders and distribution circuits. It is not a motor rated aM characteristic, so if you are protecting a motor starter circuit where only short circuit protection is wanted behind an overload relay, a gL/gG fuse is the wrong choice.
4) Does the Bussmann NHG3B come with insulated gripping lugs for safe removal?
No. The NHG3B has a live gripping lug, not insulated metal gripping lugs (IMGL). The lug is live when the fuse is energized, so removal requires an NH fuse puller and the circuit isolated. If your site standard calls for insulated lugs, this version will not meet it.
5) What amp ratings does the Bussmann NHG3B fuse come in?
Three ratings in this family: 315A (315NHG3B-690), 400A (400NHG3B-690), and 500A (500NHG3B-690). All three share the same NH3 square body, 690V rating, and gL/gG characteristic, so sizing is purely a matter of matching the cable and load on the circuit.
6) How do I tell if a Bussmann NHG3B fuse has blown without pulling it?
It has a combination fuse status indicator built in, so you get a visual confirmation of fuse condition at the base without removing the fuse or breaking the circuit. For an MRO team walking a switchroom, that turns a blown fuse check into a look rather than a pull and test.
7) Is the Bussmann NHG3B UL Listed and RoHS compliant for a spec job?
Yes on both. The NHG3B NH fuse is UL Listed and RoHS compliant, which is usually what a government, healthcare, or education submittal is looking for on a distribution fuse.
8) What is the body of the Bussmann NHG3B fuse made of?
Ceramic, in a square body form with knife blade contacts. Ceramic is what lets the fuse handle the arc energy at a 120 kA break in an industrial environment, and the square body is the standard NH form factor for knife blade bases.
How fast can I get the Bussmann 315NHG3B-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 315NHG3B-690 come with a warranty?
Absolutely. The Bussmann 315NHG3B-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 315NHG3B-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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