Mersen A15QS20 High-Speed Fuse...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$86.61
$44.01
Mersen A15QS20 High-Speed Fuse, 20A 150VAC/150VDC Ferrule Terminal

Mersen A15QS20 High-Speed Fuse, 20A 150VAC/150VDC Ferrule Terminal

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Model: A15QS20-2

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

$86.61
$44.01
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Mersen A15QS20 High-Speed Fuse, 20A 150VAC/150VDC Ferrule Terminal

The Mersen A15QS20 High-Speed Fuse delivers reliable circuit protection for AC/DC applications up to 150V with a 20A current rating. Featuring GMG body insulating material and ferrule terminal connections, this high-speed fuse provides professional-grade protection with a 200 kA breaking capacity for demanding electrical systems requiring rapid fault clearing.

Key Features

  • 20A Current Rating: Provides precise overcurrent protection for medium-load circuits and equipment protection applications.
  • 150VAC/150VDC Dual Rating: Versatile voltage compatibility enables use in both AC and DC systems up to 150V for flexible installation options.
  • 200 kA Breaking Capacity: High interrupting rating ensures reliable fault clearing even under severe short-circuit conditions for enhanced system safety.
  • High Speed Characteristic: Rapid response time protects sensitive electronic components and equipment from damage during fault conditions.
  • Ferrule Terminal Design: Professional connection method provides secure, reliable electrical contact for industrial and commercial installations.
  • GMG Body Material: Durable insulating construction ensures long-term reliability and electrical isolation in demanding environments.
  • Clip Mounting: Simple clip mounting method supports straightforward installation and replacement in the field.
  • RoHS Compliant: Meets environmental standards for safe disposal and regulatory compliance in commercial applications.

Certifications & Compliance

  • RoHS Compliant

Technical Specifications

  • Ac Max I R Breaking Capacity I1: 200 kA
  • Ac Or Dc: AC/DC
  • Ampere Rating: 20 A
  • Body Insulating Material: GMG
  • Connection Terminal Type: Ferrule
  • Frequency Hz: 50/60 Hz
  • Mounting Method: Clip
  • Product Length: 1.5 in
  • Product Weight: 0.02 lb
  • Rated Voltage Ac Ul: 150 V
  • Rated Voltage Dc Ul: 150 V
  • Rohs Compliant: Yes
  • Speed Characteristic: High Speed

Typical Applications

  • Industrial Control Panels and Motor Control Centers
  • Commercial HVAC and Building Automation Systems
  • Electronic Equipment and Instrumentation Protection
  • DC Power Supply and Battery Backup Systems
  • Process Control and Manufacturing Equipment
  • Telecommunications and Data Center Infrastructure

Why Mersen?

Mersen high-speed fuses deliver proven reliability with RoHS compliant construction and professional-grade GMG insulating materials. The compact 1.5 in length and lightweight 0.02 lb design, combined with a clip mounting method, ensures easy installation while maintaining the high 200 kA breaking capacity and dual 150VAC/150VDC voltage rating needed for critical circuit protection in industrial and commercial electrical systems.

Manufacturer Resources

Mersen Product Catalog

Product Specs

Product Type:
Semiconductor Fuse
Product Material:
GMG
Voltage Rating:
150V
Amperage Rating:
20A
Connection Type:
Ferrule
Standards:
RoHS Compliant
Department:
Electrical
Product Group:
Circuit Protection
Product Subgroup:
Fuses
Product Length:
1.5 in
Product Weight:
0.02 lb

Mersen A15QS20-2 – Frequently Asked Questions

1) Can the Mersen A15QS20 fuse be used on a DC circuit, or is it AC only?
It carries a dual rating, 150VAC and 150VDC, so it works on either. That makes it usable in DC power supply and battery backup circuits as well as AC control panels, at 50/60 Hz. Do not apply it above 150V on either side.
2) Will the A15QS20 fit standard fuse clips, or does it need a bolted holder?
The A15QS20 is a ferrule terminal fuse with a clip mounting method, so it drops into spring clip holders and blocks sized for a 1.5 inch long ferrule body. There are no bolt-on tags on it, so a bolted-terminal holder is the wrong base for this part.
3) What does a high-speed fuse protect that a regular fuse does not?
High-speed (semiconductor) fuses clear a fault far faster than a general-purpose fuse, which is what you need ahead of diodes, SCRs, IGBTs, drives and other solid-state gear that fails before a conventional fuse opens. The Mersen A15QS20 is that type, rated 20A with a 200 kA breaking capacity. For straight branch-circuit or motor loads, a time-delay fuse such as the Littelfuse CCMR Series Class CC is the normal choice instead.
4) Can a Littelfuse BLF midget fast-acting fuse be used in place of the Mersen A15QS20 high-speed fuse?
They are not interchangeable protection classes. The Mersen A15QS20 is a high-speed (semiconductor-type) fuse rated 20A at 150VAC/150VDC with a 200 kA breaking capacity, built to clear faults fast enough to protect sensitive electronics and solid-state devices. The Littelfuse BLF series is a midget fast-acting fuse rated 250V in a laminated tube. Fast-acting is not the same let-through performance as high-speed semiconductor protection, and the BLF's 250V rating is an AC circuit rating rather than the dual 150VAC/150VDC rating the A15QS20 carries. If the equipment drawing calls for a semiconductor fuse ahead of a drive, rectifier or DC bus, stay with the high-speed part.
5) I need a 40A fuse instead of 20A for a motor circuit - what should I look at?
The Mersen A15QS20 is fixed at 20A, so a higher-amperage circuit needs a different part. For motor branch circuits at 40A, the Littelfuse CCMR040 is a Class CC time-delay fuse rated 40A. The time-delay characteristic is the point of difference: it rides through motor inrush, where the A15QS20's high-speed characteristic is intended to clear quickly to protect semiconductors and instrumentation. Confirm your fuse holder accepts Class CC rejection-style bodies, since the A15QS20 uses ferrule terminals in clip mounting.
6) Is 200 kA enough interrupting rating for an industrial control panel?
200 kA is the top of the range for this class of fuse and covers available fault current at essentially any industrial service you will meet. Confirm your panel's short-circuit current rating is documented at or below that figure, and that the circuit stays within 20A and 150V.
7) What part number do I order for the Mersen 20A 150V high-speed fuse?
Order Mersen A15QS20, catalogued as A15QS20-2. It is a 20A, 150VAC/150VDC ferrule fuse with a GMG insulating body.
8) Is a Littelfuse AGU or AGA glass tube fuse an equivalent to the Mersen A15QS20?
No. The Littelfuse AGU is an AG-series glass tube fuse and the AGA5 is a 5A AGA-series glass fuse - both are small glass-bodied automotive and electronic fuses. The Mersen A15QS20 uses a GMG insulating body with ferrule terminals and carries a 200 kA breaking capacity at 150VAC/150VDC. Glass-bodied fuses do not offer that level of interrupting performance, so they are not a substitute in an industrial control panel or DC power supply where the A15QS20 is specified. They share the general ferrule-and-clip form factor, which is why they get mistaken for one another.
9) Can I use the Mersen A15QS20 to replace the fuses in a Square D PowerLogic energy meter?
No. The Square D PowerLogic energy meter fuse pack is a set of three fuses rated 0.5A at 600V, sized for metering potential-transformer leads. The Mersen A15QS20 is a 20A fuse rated 150VAC/150VDC - the amperage is far too high to protect a metering circuit and the voltage rating is below the 600V the meter fuses carry. Order the meter fuse pack for PowerLogic metering and keep the A15QS20 for semiconductor and DC bus protection at 150V or less.
10) Does the Mersen A15QS20 meet RoHS for a facility with environmental purchasing rules?
Yes, the A15QS20 is RoHS compliant, which is usually what institutional and government procurement is checking for on electrical consumables.
How fast can I get the Mersen A15QS20-2 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 A15QS20-2 come with a warranty?
Absolutely. The Mersen A15QS20-2 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 A15QS20-2?
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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