Bussmann GLR-4 Series 300V Sma...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$762.99
Bussmann GLR-4 Series 300V Small-Dimension Fast-Acting Fuse, Pack of 100

Bussmann GLR-4 Series 300V Small-Dimension Fast-Acting Fuse, Pack of 100

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Model: GLR-4

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

$762.99
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Bussmann GLR-4 Series 300V Small-Dimension Fast-Acting Fuse

The Bussmann GLR-4 Series fast-acting fuse from Eaton Bussmann is engineered to deliver dependable overcurrent protection in electrical and electronic circuits. Rated for 300V applications, this small-dimension fuse is designed to respond quickly to fault conditions, helping safeguard connected equipment, wiring, and control components from damage caused by excess current. The GLR-4 designation identifies this fuse within the Eaton Bussmann small-dimension fuse family, making it straightforward to specify an exact replacement or original-equipment match. Its compact, small-dimension form factor allows it to fit standard small-dimension fuse holders and blocks commonly used across commercial and industrial electrical panels.

Key Features

  • Voltage Rating: 300V rating supports use in a wide range of low-voltage circuit protection applications.
  • Fast-Acting Response: Fast-acting fuse construction opens the circuit quickly under overcurrent conditions to help limit damage to downstream equipment.
  • Small-Dimension Form Factor: Compact small-dimension body fits standard small-dimension fuse holders and clips for space-constrained installations.
  • GLR-4 Series: Part of the Eaton Bussmann GLR-4 series, identifying its dimensional and performance class within the Bussmann fuse lineup.
  • Circuit Protection: Provides overcurrent protection intended to help prevent damage to wiring, components, and connected devices in the protected circuit.
  • Eaton Bussmann Brand: Manufactured under the trusted Eaton Bussmann series name, a widely recognized source for circuit protection components.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Typical Applications

  • General-Purpose Overcurrent Protection Circuits
  • Control Panels and Electrical Enclosures Using Small-Dimension Fuse Holders
  • Commercial and Industrial Electrical Equipment
  • Electronic and Low-Voltage Circuit Protection
  • Replacement Fuse for Bussmann GLR-4 Series Applications
  • OEM and Replacement Fuse Specification for Small-Dimension Fuse Applications

Why Bussmann?

Bussmann, part of the Eaton Bussmann series, is a well-established name in circuit protection products used throughout commercial and industrial electrical systems. The GLR-4 series fast-acting fuse reflects that heritage, offering a 300V-rated, small-dimension design intended to deliver consistent, code-compliant overcurrent protection. For professionals specifying or replacing small-dimension fuses, selecting the correct Bussmann GLR-4 series part helps maintain the intended protection characteristics of the original circuit design. Choosing genuine Bussmann fuses helps ensure proper fit and performance in fuse holders designed for this series.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Fast-Acting Fuse
Series:
GLR-4
Voltage Rating:
300V
Configuration:
Fast-Acting
Department:
Electrical
Product Subgroup:
Fuses
list_batch:
BUSS-20260919
Installation Category:
Panel
Product Width:
.72 inches
Product Weight:
.2 pounds
Product Details:
Low Voltage
Product Diameter:
.72 inches
Product Height:
2.25 inches
Pack size (unit):
100
Product Group:
Circuit Protection
Product Material:
Glass tube
Product Length:
0.72 in

Bussmann GLR-4 – Frequently Asked Questions

1) What amp ratings does the Bussmann GLR series fuse come in?
Two amperages are offered: 4 amp (GLR-4) and 10 amp (GLR-10). Both share the same 300V rating, so the choice comes down to the amperage the circuit was originally designed around. Replace a blown fuse with the same amperage, not a higher one, or the downstream wiring and components lose the protection the design intended.
2) Will a Bussmann GLR fuse fit my existing small-dimension fuse holder?
The GLR series is a small-dimension fuse built to drop into standard small-dimension fuse holders, blocks and clips used in control panels and enclosures. The listed body dimensions are .72 inches diameter and 2.25 inches height, so measure the clip spacing or the holder's stated fuse size against those numbers before committing. If your holder is set up for a different small-dimension body length, the GLR will not seat properly.
3) Is the GLR a fast-acting or time-delay fuse, and does that matter for my load?
Fast-acting. The GLR opens quickly on an overcurrent, which is what you want protecting electronics, control wiring and solid-state devices that cannot tolerate a long fault. It is the wrong choice for loads with a high inrush, such as motors or transformer primaries, where the start-up surge will blow a fast-acting element. Those need a time-delay fuse instead.
4) Can I use a 300V fuse on a 120V or 240V control circuit?
Yes. A fuse's voltage rating is a maximum, not a target, so the 300V-rated GLR fuse is suitable on any circuit at or below 300V, including 120V and 240V control circuits. What you must not do is go the other way and apply it above 300V.
5) How many fuses come in a Bussmann GLR order?
These ship as a pack of 100, which is how maintenance and MRO stores typically buy them, one carton covers a panel refresh and leaves spares in the truck or the crib. If you only need a single replacement, a 100-count pack is more than the job calls for.
6) What part number do I order to match an existing Bussmann GLR fuse in a panel?
Match the full designation printed on the fuse body: GLR-4 for the 4 amp, GLR-10 for the 10 amp. The GLR prefix fixes the dimensional class and the fast-acting characteristic, and the number after it is the amperage. Keeping the same designation keeps the original protection characteristics of the circuit design intact.
7) Where is the Bussmann GLR fuse normally installed?
Panel-mounted applications: control panels, electrical enclosures and low-voltage equipment using small-dimension fuse holders or clips. It is a circuit protection component inside a panel or piece of equipment, not an in-line or branch-circuit disconnect device.
How fast can I get the Bussmann GLR-4 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 GLR-4 come with a warranty?
Absolutely. The Bussmann GLR-4 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 GLR-4?
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 GLR-4 from ZenSupply?
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