Mersen AG Series Class G Time-...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$46.47
Mersen AG Series Class G Time-Delay Fuse, 600VAC

Mersen AG Series Class G Time-Delay Fuse, 600VAC

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Model: AG1

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

$46.47
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Mersen AG5 Class G Time Delay Fuse, 600VAC 5A Ferrule Terminal

The Mersen AG5 Class G Time Delay Fuse delivers reliable overcurrent protection for 600VAC electrical systems, precisely rated at 5A with ferrule terminal connections for dependable circuit tie-in. This Amp-Trap style fuse carries a time delay speed characteristic suited to motor starting and inductive loads, backed by a 100 kA breaking capacity for high-energy fault interruption. Construction features tin-plated copper terminals and a GMG body insulating material, and the fuse is RoHS compliant for environmentally conscious professional installations.

Key Features

  • 600VAC Rating: Delivers reliable overcurrent protection for standard commercial and industrial voltage systems.
  • 5A Current Rating: Precisely calibrated amperage protection for small motor circuits and control applications requiring accurate overcurrent response.
  • Time Delay Characteristic: Allows temporary overcurrent conditions during motor starting while providing fast protection against sustained faults.
  • 100 kA Breaking Capacity: Delivers exceptional fault interruption capability for high-energy electrical systems and critical protection applications.
  • Class G Design: Meets industry standards for size, performance, and safety in professional electrical protection systems.
  • Ferrule Terminal Construction: Tin-plated copper terminals ensure reliable electrical connections and resistance to corrosion in service environments.
  • GMG Body Insulating Material: Supports dependable insulation performance in demanding electrical applications.
  • RoHS Compliant: Meets environmental compliance standards for professional electrical installations and sustainable practices.

Certifications & Compliance

  • RoHS Compliant

Technical Specifications

  • Ac Or Dc: AC
  • Body Insulating Material: GMG
  • Rohs Compliant: Yes

Typical Applications

  • Motor Control Centers and Starter Panels
  • Industrial Control Systems
  • Commercial HVAC Equipment Protection
  • Electrical Distribution Panels
  • Process Control and Automation Systems
  • Professional Service and Maintenance

Why Mersen?

Mersen delivers proven electrical protection technology with RoHS compliant construction and professional-grade materials, including tin-plated copper ferrule terminals and GMG insulating body material. The AG5's time delay characteristic and 100 kA breaking capacity make it a dependable choice for motor circuits and control applications where accurate overcurrent response and dependable fault interruption are essential to code-compliant, reliable electrical system performance.

Manufacturer Resources

Mersen Product Catalog

Product Specs

Product Type:
Time-Delay Fuse
Connection Type:
Ferrule
Product Group:
Circuit Protection
Department:
Electrical
Product Subgroup:
Fuses
Product Weight:
0.016 lb

Mersen AG1 – Frequently Asked Questions

1) What amp ratings does the Mersen AG Series Class G fuse come in?
The AG Series covers six ratings: 1A (AG1), 3A (AG3), 5A (AG5), 10A (AG10), 15A (AG15) and 20A (AG20). All are 600VAC time-delay Class G ferrule fuses, so once you know the circuit you are protecting you just pick the amperage and the rest of the construction is the same across the range.
2) Will a Littelfuse AGU or AGA glass fuse work as a replacement for a Mersen AG Class G fuse?
No. Despite the similar letters, the Littelfuse AGA and AGU are glass tube fuses of a different family, and dropping one into a Class G holder is not a substitution. The Mersen AG is a Class G fuse, which is a rejection-style dimension set specific to its amperage band, so the body it goes into will only accept the matching Class G fuse. Order the AG in the amp rating you need rather than a glass tube part.
3) Can I use a Mersen AG fuse on a motor starter that trips on inrush?
That is what the time delay characteristic is for. The AG Series holds through the temporary overcurrent of a motor start or another inductive load and then clears on a sustained fault, which is why it is used in motor control centres, starter panels and commercial HVAC equipment. A fast-acting fuse in the same spot will open on inrush.
4) Is the Mersen AG fuse rated for a 480V or 600V industrial panel?
Yes, the AG Series is rated 600VAC across all six amp ratings, so it covers 480V and 600V AC distribution and control circuits. It is an AC-only device, so do not apply it to a DC circuit.
5) Can a Littelfuse CCMR Class CC time-delay fuse be used in place of a Mersen AG Class G fuse?
No. The Mersen AG series is a Class G time-delay fuse rated 600VAC with ferrule terminals, offered in 1A, 3A, 5A, 10A, 15A and 20A. The Littelfuse CCMR040 is a Class CC time-delay fuse rated 40A. Class G and Class CC fuses use different body dimensions and different rejection features, so a Class CC fuse will not seat in a Class G fuseholder and a Class G fuse will not seat in a Class CC clip. Both share a time-delay characteristic suited to motor starting, but the holder in the panel decides which class you order. If the equipment is built around Class CC clips, the CCMR is the time-delay part for that block; if it takes Class G, stay with the AG.
6) Is a Littelfuse AGU or AGA glass tube fuse the same thing as a Mersen AG fuse just because of the AG in the name?
No, and the naming trips people up. The Mersen AG series is a Class G time-delay fuse rated 600VAC with tin-plated copper ferrule terminals and a 100 kA breaking capacity, built for motor control centers, starter panels and distribution panels. The Littelfuse AGU series is an AG glass tube fuse supplied in a boxed package, and the Littelfuse AGA5 is a 5A glass fuse in the AGA series. AG in the Littelfuse part numbers refers to the glass tube family, not to NEC fuse Class G. If the panel calls for a Class G branch or motor circuit fuse, the Mersen AG is the part; the AGU and AGA glass tubes serve small equipment and accessory circuits. A 5A rating appears in both the Mersen AG5 and the Littelfuse AGA5, so matching amperage alone will not tell you which one the holder takes.
7) What fault current can a Mersen AG Class G fuse interrupt?
100 kA breaking capacity, which is what lets the AG Series sit in service-connected control panels and distribution gear where available fault current is high. If your panel schedule calls for a fuse with an interrupting rating at or below 100 kA, the AG covers it.
8) Should I use a Class G fuse or a Class CC fuse for motor circuit protection?
Both are time-delay options but they are different sizes and different holders, and they are not interchangeable. The Mersen AG is Class G and tops out at 20A in this range, which suits small motor circuits and control power. Where you need a higher rating, a Class CC time-delay fuse such as the Littelfuse CCMR Series goes to 40A in the CCMR040. Match the fuse class to the fuse block or holder already in the panel, since neither class will seat in the other's clips.
9) How does the Mersen AG fuse connect into a fuse block?
Ferrule terminals, tin-plated copper, so it seats into spring clips in a Class G fuse block rather than bolting down. The tin plating is there to resist corrosion at the clip contact, which is where nuisance heating usually starts in a panel that has been in service a while.
10) Can I standardize my control panels on one Mersen AG fuse and stock spares?
Yes, and the range makes that practical: 1A, 3A and 5A cover control and small motor circuits, with 10A, 15A and 20A for larger branch loads, all sharing the same 600VAC time-delay Class G construction. Stocking across the six ratings means one fuse block type and one part family for a facility, so long as the existing blocks are Class G.
11) Is a midget fuse the same thing as a Class G fuse?
No. A midget fuse like the Littelfuse BLF Series is a fast-acting 250V part in a laminated tube, and it is neither the same dimension nor the same voltage class as the Mersen AG. If your panel has Class G blocks and you are protecting a motor or inductive load at up to 600VAC, the AG is the part; a 250V fast-acting midget belongs on a different circuit entirely.
12) What should I use if the circuit needs a fast-acting fuse instead of a time-delay one?
The Mersen AG series is time-delay throughout, which is what lets it ride through motor inrush without opening. If the load has no inrush and the equipment specifies a fast-acting characteristic, the Littelfuse BLF series is a midget fast-acting fuse rated 250V with a laminated tube body. Note the two are not dimensionally interchangeable and the voltage ratings differ: the AG is a Class G fuse rated 600VAC, while the BLF is a 250V midget. Confirm both the holder style and the circuit voltage before swapping speed characteristics, since a 250V fuse cannot be substituted into a 600V circuit.
13) Can I use a Mersen AG fuse to replace the fuses in a Square D PowerLogic energy meter?
No. Square D supplies the PowerLogic energy meter fuse pack as a matched set of three rated 0.5A at 600V, sized for the metering potential leads on that instrument. The Mersen AG Class G series starts at 1A and runs through 3A, 5A, 10A, 15A and 20A, so it does not reach the 0.5A rating the meter circuit calls for, and it is a Class G body rather than the meter's own holder format. Use the PowerLogic pack for the meter itself and the AG series for the motor and control branch circuits in the same panel.
14) Is the Mersen AG Series fuse RoHS compliant for a spec-driven institutional job?
Yes, the AG Series is RoHS compliant. The body is a GMG insulating material with tin-plated copper ferrules.
How fast can I get the Mersen AG1 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 Mersen AG1 come with a warranty?
Absolutely. The Mersen AG1 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 Mersen AG1?
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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