Mersen Amp-Trap® A150X aR High...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$795.77
Mersen Amp-Trap® A150X aR High Speed Semiconductor Fuse, 1500V

Mersen Amp-Trap® A150X aR High Speed Semiconductor Fuse, 1500V

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Model: A150X70-4

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

$795.77
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Mersen Amp-Trap® A150X aR High Speed Semiconductor Fuse, 1500V

The Mersen Amp-Trap® A150X Form 101 semiconductor protection fuse is an aR high speed fuse rated up to 1500VAC/DC, engineered for traction drive and auxiliary circuits as well as high voltage heavy-duty rectifier applications. Built with a rugged GMG fiberglass body and bolted connection terminals, the A150X is suitable for use up to 1500VDC on circuits depending on time constant, and carries UL Recognized Component status under UL File E60314 for demanding industrial power protection.

Key Features

  • Voltage Rating: 1500VAC/DC rated for a wide range of high voltage applications, with Mersen self-certification to 1000VDC.
  • Speed Characteristic: High speed aR fuse designed specifically for semiconductor protection.
  • Durable Construction: Rugged fiberglass body with GMG body insulating material for reliable performance in heavy duty service.
  • Connection Terminal: Bolted, tin-plated brass terminals for a secure, low-resistance connection.
  • Heavy Duty Links: Constructed for traction drive and high voltage heavy-duty rectifier circuits.
  • Operating Temperature: Rated for a maximum operating and storage temperature of 80°C, with a minimum storage temperature of -25°C.

Certifications & Compliance

  • UL Recognized Component, UL File E60314
  • UL Recognized 10A-600A @ 1500VDC, L/R<2ms, 100kA
  • Mersen self-certified for 1000VDC

Technical Specifications

  • Body Insulating Material: GMG
  • Country Of Origin: MX
  • Mounting: Bolted
  • Connection Terminal Type: Bolted
  • Connection Terminal Material: Tin-Plated Brass
  • Product Line: Amp-Trap® A150X 1500VAC 1000VDC
  • Rated Voltage AC UL: 1500 V
  • Rated Voltage DC UL: 1500 V
  • AC Max IR Breaking Capacity I1: 200 kA

Typical Applications

  • Traction Drive Circuits
  • Auxiliary Circuits for Rail and Transit Power Systems
  • High Voltage Heavy-Duty Rectifier Protection
  • Semiconductor Protection in Industrial Power Equipment
  • DC Circuit Protection up to 1500VDC

Why Mersen?

Mersen's Amp-Trap® A150X fuses combine a rugged fiberglass body, bolted tin-plated brass terminals, and UL Recognized Component certification to deliver dependable, code-compliant semiconductor protection for traction, rectifier, and other heavy duty high voltage circuits.

Manufacturer Resources

Mersen Product Catalog

Product Specs

list_batch:
MERSEN-20260825
Product Type:
Semiconductor Fuse
Product Material:
GMG
Voltage Rating:
1500V
Connection Type:
Bolted
Listing:
UL Recognized
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuses

Mersen A150X70-4 – Frequently Asked Questions

1) Can the Mersen A150X aR fuse be used on a 1500VDC bus?
The A150X is rated 1500VAC/DC and is suitable for use up to 1500VDC depending on the circuit time constant. Its UL Recognition covers 10A to 600A at 1500VDC with L/R under 2ms and 100kA interrupting. Mersen's own self-certification is stated at 1000VDC, so on DC above that you are relying on the UL Recognized data and your circuit's L/R. AC interrupting rating is 200kA.
2) What does the aR designation on a semiconductor fuse mean, and is this the right fuse for protecting IGBTs or diodes?
aR is the high speed, semiconductor-protection class: it clears fast enough to limit I2t into silicon, which is what rectifier diodes, SCRs and IGBT stacks need. That is exactly what the Amp-Trap A150X is built for, with traction drives, rail auxiliary circuits and high voltage heavy-duty rectifiers named as its applications. It is not a motor-circuit or branch-circuit fuse; if you are protecting a motor feeder, a time-delay Class CC fuse such as the Littelfuse CCMR040 is the right family instead.
3) How does the A150X mount, and do I need fuse clips or a holder?
It is a bolted fuse, not a clip-in cartridge. Terminals are tin-plated brass and bolt directly to busbar or a bolt-down base, so you need the mounting bolts and hardware for your bus, not a fuse holder. Tin plating keeps the joint low-resistance against copper bus.
4) Is the A150X UL Listed or UL Recognized, and will that satisfy an inspector?
It is a UL Recognized Component under UL File E60314, not a standalone UL Listed device. Recognized components are evaluated for use inside a listed assembly such as a drive or rectifier panel, which is how these fuses are normally applied. If your specification calls for a UL Listed branch-circuit fuse, this is not that part.
5) Can a Littelfuse CCMR Class CC time-delay fuse be used in place of the Mersen A150X aR semiconductor fuse?
No. The Mersen A150X is a high speed aR fuse rated 1500VAC/DC with bolted tin-plated brass terminals, built to clear fast enough to protect semiconductor devices in traction drive and heavy-duty rectifier circuits. The Littelfuse CCMR040 is a 40A Class CC time-delay fuse, a ferrule-style branch and motor circuit fuse with a deliberately delayed characteristic. A time-delay curve is the opposite of what a diode or thyristor stack needs, and the CCMR mounts in a Class CC clip holder rather than on bolted bus terminals, so it is not a substitute in either respect.
6) How hot can a Mersen A150X run in an enclosure?
Maximum operating and storage temperature is 80C, with minimum storage at -25C. In a sealed drive cabinet that ceiling is on the fuse body, so account for enclosure rise above ambient and for any derating your drive manufacturer specifies.
7) What exact part number do I order for the Mersen A150X, and where is it made?
The model covered here is Mersen Amp-Trap A150X70-4, from the A150X Form 101 series. Country of origin is Mexico. Quote the full suffix when ordering, since the number after A150X sets the amp rating and the trailing digit the form factor.
8) Can I substitute a glass tube or midget fuse for a semiconductor fuse like this?
No. Glass tube and midget fuses such as the Littelfuse AGU Series or the 250V BLF midget fast-acting series are low voltage control and automotive-class protection, nowhere near the 1500V rating or the bolted high-energy construction of the A150X. Replacing an aR semiconductor fuse with one of those will not clear a rectifier fault, and the voltage rating alone rules it out.
9) What should I use for a 250V control or branch circuit instead of the Mersen A150X aR fuse?
The A150X is a 1500VAC/DC semiconductor protection fuse on bolted terminals, far more fuse than a low voltage control circuit needs and not mountable in a clip holder. For a 250V midget fast-acting application, the Littelfuse BLF series is a 250V midget fast-acting fuse in a laminated tube. Keep the A150X for traction drive, auxiliary rail and transit, and high voltage rectifier circuits where its 1500V rating and high speed aR characteristic are the point.
10) Is a glass tube fuse like the Littelfuse AGU or AGA5 interchangeable with the Mersen A150X?
No. The Littelfuse AGU is an AG glass tube fuse and the AGA5 is a 5A AGA series glass fuse, both small cylindrical glass-body cartridges for low voltage and automotive-style circuits. The Mersen A150X uses a rugged GMG fiberglass body with bolted tin-plated brass terminals and is rated 1500VAC/DC with 200kA AC breaking capacity, which is what lets it interrupt a semiconductor fault. The two are different classes of device with no shared mounting or rating.
11) My meter cabinet needs fuses - does the Mersen A150X cover that, or is there a better fit?
For metering taps, a dedicated low-amperage fuse set is the right tool: the Square D PowerLogic energy meter fuse pack supplies three 0.5A 600V fuses. The Mersen A150X is a 1500VAC/DC high speed aR semiconductor fuse with bolted terminals, UL Recognized under UL File E60314, and is intended for traction drive, auxiliary, and high voltage heavy-duty rectifier circuits rather than instrument or metering duty.
12) What is the GMG body material on this fuse and why does it matter?
The body is GMG fiberglass, a rigid glass-reinforced insulating material used instead of ceramic on heavy-duty high voltage links. It takes the mechanical and thermal abuse of traction and rectifier service without the brittleness of a ceramic barrel.
How fast can I get the Mersen A150X70-4 delivered?
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Does the Mersen A150X70-4 come with a warranty?
Absolutely. The Mersen A150X70-4 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 Mersen A150X70-4?
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