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Mersen A6T60 Class T Fast-Acting Fuse, 60A 600VAC/300VDC Ferrule
The Mersen A6T60 Class T Fast-Acting Fuse delivers reliable overcurrent protection rated 60A for both 600VAC and 300VDC applications. Built with a GMG insulating body and copper ferrule terminals, this professional-grade fuse provides 200kA breaking capacity and clip mounting for versatile installation in industrial and commercial equipment. Fast-acting Class T response minimizes fault damage and downtime across mixed AC/DC electrical systems.
Key Features
- 60A Current Rating: Provides precise overcurrent protection for medium-duty electrical circuits and equipment.
- Class T Fast-Acting Response: Delivers rapid fault clearing to minimize equipment damage and system downtime.
- Dual Voltage Capability: Rated 600VAC and 300VDC for versatile AC/DC system compatibility.
- 200kA Breaking Capacity: Handles high fault currents safely for reliable protection under severe fault conditions.
- Ferrule Terminal Design: Copper terminals provide secure, low-resistance connections for optimal performance.
- GMG Insulating Body Material: Professional-grade construction ensures reliable insulation and durability.
- Clip Mounting System: Enables quick installation and replacement in compatible fuse holders.
- 50/60 Hz Frequency Rating: Compact 1.57 in. length and 0.083 lb weight suit tight panel and holder spacing.
Technical Specifications
- Body Insulating Material: GMG
Typical Applications
- Industrial Motor Control Centers
- Commercial Electrical Distribution Panels
- HVAC Equipment Protection
- Power Supply and UPS Systems
- DC Power Distribution Systems
- Manufacturing Equipment Protection
Why Mersen?
Mersen fuses deliver proven reliability with professional-grade GMG insulating body material and copper ferrule terminals built for demanding electrical protection. The compact 1.57-inch length and lightweight 0.083 lb design ease installation while the 200kA breaking capacity and Class T fast-acting response keep AC and DC circuits protected under severe fault conditions.
Manufacturer Resources
Mersen Product Catalog
Product Specs
- Product Type:
- Fast-Acting Fuse
- Product Material:
- GMG
- Connection Type:
- Ferrule
- Voltage Rating:
- 600VAC/300VDC
- Amperage Rating:
- 60A
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Subgroup:
- Fuses
- Product Weight:
- 0.083 lb
- Product Length:
- 1.57 in
Mersen A6T60 – Frequently Asked Questions
1) Can the Mersen A6T60 fuse be used on a 300V DC circuit, or is it AC only?
The A6T60 is dual rated: 600VAC and 300VDC. That means it can be applied in DC power distribution, UPS and battery systems up to 300V DC as well as 600V AC industrial circuits. Do not apply it above 300V on the DC side, since the DC rating is the lower of the two.
2) Is the A6T60 fast-acting or time-delay, and will it hold a motor inrush?
Fast-acting. The A6T60 clears quickly to limit fault energy, which suits feeders, panels, power supplies and UPS circuits, but a fast-acting fuse is not the right choice for protecting a motor on its own starting inrush. For motor branch circuits a time-delay fuse is the usual pick, for example the Littelfuse CCMR Series Class CC time-delay fuse, offered at 40A as the CCMR040.
3) What interrupting rating does the 60A Mersen Class T fuse have for a high fault current service?
200kA breaking capacity. That covers service entrance and motor control center locations where available fault current is high, and it is the figure you cite when you need the fuse to be the current-limiting device ahead of lower rated equipment.
4) My panel needs fuses for a PowerLogic energy meter, not feeder protection. Is the Mersen A6T60 the right part?
No. Metering circuits take a small current-limiting fuse, and the Square D PowerLogic energy meter fuse pack is a set of three rated 0.5A 600V for exactly that duty. The Mersen A6T60 is a 60A Class T fuse rated 600VAC/300VDC for feeder, motor control and distribution protection. The voltage class overlaps, but the amperage does not, so the A6T60 will not protect a meter input.
5) Can a Littelfuse CCMR040 Class CC fuse be used in place of a Mersen A6T60?
No. The Mersen A6T60 is a 60A Class T fast-acting fuse rated 600VAC/300VDC with ferrule terminals, while the Littelfuse CCMR040 is a Class CC time-delay fuse rated 40A. The two differ in class, body dimensions, amperage and clearing characteristic, so the CCMR040 will not fit a Class T clip or holder sized for the A6T60 and will not carry 60A. Use a Class CC fuse only where the panel or holder is prepped for Class CC, and keep Class T where the A6T60 was installed.
6) How is a Class T fuse different from a midget or glass tube fuse for small equipment?
Class T is a high interrupting, current-limiting power fuse class for 600V distribution and MCC work, and the A6T60 carries a 200kA breaking capacity at 60A. Midget and glass tube fuses are low voltage control and appliance parts by comparison, like the Littelfuse BLF Series midget fast-acting fuse at 250V or the Littelfuse AGU glass tube fuse. They are not substitutes for each other, either electrically or dimensionally.
7) What exact part number do I order for the 60A 600V Mersen Class T fuse?
Order Mersen A6T60. The A6T prefix is the 600VAC Class T series and the 60 is the ampere rating, so A6T60 is the 60A member of that family.
8) Is a midget fast-acting fuse like the Littelfuse BLF an equivalent to the Mersen A6T60?
They share the fast-acting characteristic but are not interchangeable. The Littelfuse BLF series is a midget fast-acting fuse rated 250V in a laminated tube body, while the Mersen A6T60 is a Class T fuse rated 600VAC and 300VDC with copper ferrule terminals and a 1.57 in. length. A 250V midget fuse cannot be substituted into a 600V Class T position. Choose the BLF only for low-voltage control circuits sized for midget fuse blocks.
9) What should I use for in-line automotive or audio circuits instead of the Mersen A6T60?
Glass tube fuses suit those circuits better than a Class T fuse. The Littelfuse AGU series is an AG glass tube fuse and the AGA5 is a 5A AGA series glass fuse, both intended for in-line holders rather than the clip-mounted Class T blocks the Mersen A6T60 drops into. The A6T60 is a 60A 600VAC/300VDC industrial fuse built for motor control centers, distribution panels and DC power distribution, which is a different duty entirely.
10) What is the body of the A6T60 fuse made of, and is it suitable for 50/60 Hz industrial gear?
The body is GMG insulating material with copper ferrule terminals, and the fuse is rated for 50/60 Hz service. Copper terminals keep contact resistance low in the holder clips, which matters on continuous loads like HVAC equipment and distribution feeders.
How fast can I get the Mersen A6T60 delivered?
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Does the Mersen A6T60 come with a warranty?
Absolutely. The Mersen A6T60 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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