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Bussmann GMW-1/100 Eaton Series Fast-Acting Fuse, 125V
The Bussmann GMW-1/100 is an Eaton Bussmann series fast-acting fuse engineered for precise overcurrent protection in low-amperage electrical and electronic circuits. Rated 125V with an amperage rating of 0.01-100A and a 35 AIC interrupt rating, this compact, non-indicating fuse responds quickly to fault conditions, clearing 4 hours minimum at 100% of rated current and within 10 seconds maximum at 200% of rated current. Its small footprint makes it well suited to space-constrained panels, control circuits, and instrumentation applications where dependable, code-compliant circuit protection is required.
Key Features
- Amperage Rating: 0.01-100A for precise low-amperage circuit protection.
- Voltage Rating: 125V for standard low-voltage circuit applications.
- Fast-Acting Response: Clears in 4 hr minimum at 100% and 10 s maximum at 200% of rated current for quick fault interruption.
- Interrupt Rating: 35 AIC for reliable performance under fault current conditions.
- Fuse Indicator: Non Indicating design for standard installations without visual blown-fuse signaling.
- Compact Dimensions: .28 IN length, .28 IN height, .252 IN width, and 7.1 MM diameter for space-constrained mounting.
- Packaging Type: Standard packaging for straightforward stocking and replacement.
Technical Specifications
- Amperage Rating: 0.01-100A
- Voltage Rating: 125V
- Interrupt Rating: 35 AIC
- Fuse Indicator: Non Indicating
- Response Time: 4 hr minimum at 100%, 10 s maximum at 200%
- Packaging Type: Standard
- Product Details: Specialty
- Product Length: .28 IN
- Product Height: .28 IN
- Product Width: .252 IN
- Product Diameter: 7.1 MM
- Product Weight: .2 LB
Typical Applications
- Electronic Equipment and Circuit Board Protection
- Control Circuit and Instrumentation Wiring
- Low-Amperage Panel and Control Panel Circuits
- Commercial and Industrial Electrical Systems
- Fuse Replacement and Maintenance Applications
Why Bussmann?
As part of the Eaton Bussmann series, the GMW-1/100 delivers the precise, fast-acting overcurrent protection professionals expect for low-amperage circuits, backed by a defined 35 AIC interrupt rating and a specified fast-acting response time. Its compact, non-indicating design and standard packaging make it a dependable choice for maintaining safe, code-compliant circuit protection in commercial and industrial electrical systems.
Manufacturer Resources
Spec Sheet
Product Specs
- Product Type:
- Fast-Acting Fuse
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Subgroup:
- Fuses
Bussmann GMW-1/100 – Frequently Asked Questions
1) What amp ratings does the Bussmann GMW fuse come in?
Two amp ratings are offered on the GMW series fast-acting fuse: GMW-1/100 (1/100 amp) and GMW-1/32 (1/32 amp). Both are extremely low-amperage fuses meant for instrumentation and electronic circuit protection, not branch-circuit or motor loads. Order by the exact MPN, since the two look identical in the hand.
2) Will a Bussmann GMW fuse work in a 24V or 120V control circuit?
The GMW is rated 125V, so it covers 24V DC control wiring and standard 120V control circuits. Do not use it above 125V. Its interrupting rating is 35 AIC, which suits low-energy control and instrumentation circuits rather than high fault-current power distribution.
3) What size fuse holder or clips does the GMW fit?
The GMW body measures .28 x .28 x .252 inches with a 7.1 mm diameter, so it needs a holder or clip sized for that subminiature body, not a standard 1/4 x 1-1/4 inch glass cartridge holder. If your panel uses the common 3AG size clips, the GMW will not seat in them.
4) Is the GMW fast-acting or time-delay, and how fast does it clear?
Fast-acting, with no intentional time delay. It carries 100% of rated current for 4 hours minimum, and opens within 10 seconds maximum at 200% of rated current. That makes it right for electronics and instrumentation that cannot tolerate sustained overcurrent, and wrong for loads with inrush like transformers or motors, where a time-delay fuse is the correct choice.
5) Can I tell by looking whether a GMW fuse has blown?
No. The GMW is a non-indicating fuse, so there is no pop-up pin or visual blown-fuse signal. Maintenance crews need to test continuity with a meter or swap in a known-good fuse. If your spec calls for visual indication, you need an indicating fuse instead.
6) What is the GMW fuse actually used for?
Low-amperage protection in electronic equipment and circuit boards, control circuit and instrumentation wiring, and low-amperage control panel circuits. At 1/100 and 1/32 amp it protects meter movements, sensor loops, and signal circuits where even a small overcurrent damages the device. It is not a branch-circuit protective device.
7) Is the GMW a Bussmann or an Eaton fuse?
Both names refer to the same part. The GMW is an Eaton Bussmann series fuse, so a drawing calling out either Bussmann GMW-1/32 or Eaton GMW-1/32 is specifying this item.
How fast can I get the Bussmann GMW-1/100 delivered?
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Does the Bussmann GMW-1/100 come with a warranty?
Absolutely. The Bussmann GMW-1/100 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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