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Mersen GGM Series Fast-Acting Miniature Glass Fuse, 5x20mm Ferrule Terminal
Model: MER-GGM
Mersen GGM Series Fast-Acting Miniature Glass Fuse, 5x20mm Ferrule TerminalThe Mersen GGM Series Fast-Acting Miniature Glass Fuse delivers precise supplemental overcurrent protection for sensitive...
Mersen
Starting at
$318.57
Mersen GSB Series Fast-Acting Glass Fuse, 250VAC 5x20mm, Ferrule Terminal
The Mersen GSB Series is a fast-acting glass fuse family engineered for reliable overcurrent protection in electronic and control circuits. Rated 250VAC and housed in a compact 5mm x 20mm glass body with ferrule termination, GSB fuses respond quickly to fault currents to help safeguard sensitive downstream components. The family spans a wide amperage range from 1/16A through 10A, giving specifiers flexibility across a variety of circuit-protection applications while keeping the same proven glass-body construction and ferrule termination throughout the line.
Key Features
- Body Size: 5mm x 20mm glass body for compatibility with standard 5x20mm fuse clips and holders.
- Durable Construction: Glass body insulating material allows visual inspection of the fuse element condition.
- Fast-Acting Speed Characteristic: Responds quickly to overcurrent conditions to help protect connected equipment.
- Voltage Rating: 250VAC rated across the GSB family's 1/16A through 10A ampere range.
- Termination: Ferrule connection terminal type for secure seating in standard fuse clip mountings.
- Mounting: Designed for clip-style mounting in fuse holders and fuse blocks.
- Product Diameter: 0.2 in for standard 5x20mm holder compatibility.
Certifications & Compliance
- UL and CSA Recognized, 1/16A through 10A, 250VAC
- VDE Approved, 1/16A through 6-3/10A, 250VAC
- SEMKO Approved, 1/16A through 6-3/10A, 250VAC
- IEC-127-2 Standard Sheet 2
Technical Specifications
- Refer to manufacturer documentation for complete technical specifications.
Typical Applications
- Electronic Equipment and Control Circuit Protection
- Instrumentation and Test Equipment
- Panel-Mount and PCB Fuse Holders
- Power Supplies and Low-Voltage Electronic Devices
- Industrial and Commercial Control Panels
Why Mersen?
Mersen's GSB Series pairs a glass fuse body with fast-acting protection and broad third-party recognition, including UL and CSA recognition, VDE approval, SEMKO approval, and compliance with the IEC-127-2 standard sheet 2. That combination of visual inspectability, quick response to fault conditions, and multi-agency approval makes the GSB Series a dependable choice for professionals who need consistent, code-compliant overcurrent protection across a wide range of 250VAC circuit-protection applications, from instrumentation and test equipment to panel-mount and PCB fuse holders. The 5x20mm glass body and ferrule termination keep GSB fuses drop-in compatible with the fuse clips and holders already standard in electronic and control-panel designs, while the 1/16A through 10A ampere range lets one proven, glass-body fuse family cover a broad set of circuit-protection needs without switching platforms.
Manufacturer Resources
Product Specs
- Product Type:
- Fuse
- Product Material:
- Glass
- Voltage Rating:
- 250VAC
- Amperage Rating:
- 1/16A - 10A
- Series:
- GSB
- Listing:
- UL/CSA Recognized
- Standards:
- IEC-127-2
- Country of Origin:
- China
- Department:
- Electrical
- Product Group:
- Wiring Devices
Mersen GSB8/100 – Frequently Asked Questions
1) Will a Mersen GSB fuse fit a standard 5x20mm fuse holder?
Yes. The GSB Series uses the 5mm x 20mm glass body with ferrule ends, so it drops into the standard 5x20mm clips, panel-mount holders and PCB holders already used in most control and electronic equipment. No adapter or different holder is needed.
2) Is the Mersen GSB a fast-acting or time-delay fuse, and which should I use?
GSB is fast-acting. It clears quickly on a fault, which is what you want protecting semiconductors, instrumentation and low-voltage electronics downstream. If your load has an inrush surge (motors, transformers, switching supplies that trip a fast fuse at startup), a fast-acting fuse will nuisance-open and you want a time-delay type instead, such as the Littelfuse CCMR Series Class CC time-delay fuse for larger branch circuits.
3) Can I use the Mersen GSB fuse on a 480V circuit?
No. GSB is rated 250VAC and must not be applied above that. On a higher-voltage circuit the fuse can fail to interrupt the arc. For 480V or 600V applications use a fuse rated for that system voltage, such as a Class CC type.
4) Does the Mersen GSB fuse carry UL and CSA recognition for a control panel build?
GSB fuses are UL and CSA Recognized from 1/16A through 10A at 250VAC. The family is also VDE Approved and SEMKO Approved from 1/16A through 6-3/10A at 250VAC, and built to IEC-127-2 Standard Sheet 2, which is why it works for both North American and European panel documentation.
5) Is the Mersen GSB the same thing as a Littelfuse AGU or AGA fuse?
No, they are different body formats. GSB is the metric 5x20mm glass cartridge used in IEC-style clips and electronic equipment. The Littelfuse AGA and AGU are AG-series glass tube fuses in imperial sizes, common in automotive and older North American equipment. Pick by the holder you already have, not by the amp rating alone.
6) What is a fast-acting glass fuse alternative to the Mersen GSB for a circuit that needs time-delay protection instead?
The Mersen GSB Series is a fast-acting glass fuse, so it clears overcurrent quickly and is not intended for loads with high inrush such as motors or transformers. For a time-delay characteristic, the Littelfuse CCMR Series is a Class CC time-delay fuse; the CCMR040 covers 40A. Note that is a different physical platform entirely - a Class CC fuse will not seat in a 5x20mm clip, so the holder has to change with it.
7) Is a Littelfuse AGA5 a direct swap for a Mersen GSB fuse?
They are not interchangeable by body size. The Littelfuse AGA5 is a 5A AGA Series glass fuse, which is the AG-style tube format, while the Mersen GSB uses a 5mm x 20mm glass body with ferrule termination sized for standard 5x20mm clips and holders. Both are glass-bodied and visually inspectable, but the fuse clips are cut for different lengths, so confirm the holder's clip spacing before substituting either way.
8) Can I use a Mersen GSB fuse to replace the fuses in a Square D PowerLogic energy meter?
No - match the meter fuse to what the meter manufacturer specifies. The Square D PowerLogic energy meter fuse pack is a set of three rated 0.5A at 600V. The Mersen GSB Series is rated 250VAC, so it is below the voltage rating that metering application calls for even though the GSB range starts at 1/16A. For metering potential-transformer leads, stay with the 600V-rated fuse pack.
9) What amperage ratings does the Mersen GSB glass fuse come in?
The GSB family spans 1/16A through 10A at 250VAC, all in the same 5x20mm glass body, so you can standardize one fuse platform across a panel and only change the ampere value. Orderable ratings include 2A (GSB2), 3.15A (GSB3-15/100) and 8A (GSB8/100).
10) Why choose a glass body fuse instead of a ceramic or laminated tube one?
The glass body on the GSB lets you see the element, so a blown fuse is identified by eye without pulling a meter out. That matters for service techs working a panel under time pressure. Where you need a higher interrupting capability in a midget size instead, the Littelfuse BLF Series is a fast-acting 250V fuse in a laminated tube body.
11) What is the exact part number for a 3.15A Mersen GSB fuse?
The 3.15A rating orders as GSB3-15/100, the 2A as GSB2, and the 8A as GSB8/100. All three are the same 5x20mm glass fast-acting body at 250VAC, so the only variable on the order is the ampere value.
12) I need more current than the Mersen GSB tops out at - what else is there?
The Mersen GSB family runs 1/16A through 10A at 250VAC. If the circuit draws beyond that, the Littelfuse AGU Series is an AG glass tube fuse supplied in a boxed package and is the usual step up in the glass-tube family, and for higher-capacity 250V branch protection the Littelfuse BLF Series is a midget fast-acting fuse rated 250V in a laminated tube body. The BLF keeps the fast-acting characteristic of the GSB but in a midget body, so it needs midget-size clips rather than 5x20mm.
13) What is the difference between the Mersen GSB and the Littelfuse BLF midget fuse for control panel protection?
Both are fast-acting and rated for 250V service. The Mersen GSB uses a glass body in 5x20mm with ferrule terminals, which lets an electrician see the element condition at a glance during troubleshooting. The Littelfuse BLF Series uses a laminated tube body in a midget format, which is opaque, so a blown BLF has to be checked with a meter or an indicating holder. Panel builders who want visual inspection in an instrumentation or control circuit usually keep the glass GSB.
14) For European equipment that requires IEC-compliant fuses, does the Mersen GSB qualify and what are the alternatives?
The Mersen GSB Series is built to IEC-127-2 Standard Sheet 2 and is UL/CSA Recognized, with VDE and SEMKO approval on the 1/16A through 6-3/10A ratings at 250VAC - that is the combination OEMs normally need for equipment shipped into Europe, and the 3.15A GSB3-15/100 falls inside the VDE and SEMKO range. The Littelfuse AGA and AGU Series are AG-format glass tube fuses built around the North American tube sizes rather than the 5x20mm IEC body, so for an IEC-specified holder the GSB is the one that matches the sheet.
15) Where is the Mersen GSB fuse made?
GSB Series fuses are manufactured in China. If your spec or procurement contract requires a country-of-origin declaration, that is the value to record.
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Absolutely. The Mersen GSB8/100 is backed by a manufacturer’s warranty.
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