Mersen A3T175 - Fuse A3T - Class T - Fast-Acting 300VAC 160VDC 175A Blade Amp-Trap®
Mersen

A3T175

Alternate Item Number: A3T175

UPC: 782001890223


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Overview

The Mersen A3T175 is a Class T, fast-acting fuse designed for high-current limitation and compact installation. With a rating of 175 Amps, it provides robust protection across 300VAC and 160VDC systems. This fuse offers an impressive interrupting rating of 200kA for AC circuits and 50kA for DC circuits, ensuring safety in fault conditions. Its unique physical dimensions are specifically engineered to prevent the substitution of fuses with lower voltage or current-limiting capabilities, maintaining system integrity. The A3T175 features a durable glass melamine body for superior dimensional stability and permanent catalog number identification stamped directly onto the blades. This fuse is ideal for applications in loadcenters, panelboards, switchboards, circuit breakers, and metering centers where reliable, fast-acting overcurrent protection is paramount. It is UL listed to standard 248-15 and CSA certified to standard C22.2 no. 248.15, with DC listing to UL standard 248, providing assurance of quality and compliance. The small physical size offers greater design flexibility in space-constrained environments. SKU: A3T175. Manufacturer: Mersen.
  • Fast-acting Class T fuse for high current limitation
  • Rated for 175A, 300VAC, and 160VDC
  • High interrupting rating: 200kA AC, 50kA DC
  • Unique dimensions prevent improper substitution
  • Durable glass melamine body with blade-stamped catalog numbers

Specifications

AC Voltage Rating
300 V
Amperage Rating
175 A
Application
Load centers Panelboards Switchboards Circuit breakers Metering centers
Body Material
GMG
Brand Name
Mersen
Class
Class T
Connection
Blade
Connection Material
Copper
DC Voltage Rating
160 V
Interrupt Rating
200 kA
Mounting
Bolted
Size
2.44 x 1.06 in
Size
61.976 x 26.924 mm
Special Features
Extremely current-limiting for low peak let-thru current Unique dimensions prevent replacement by other fuse classes Blade-stamped catalog numbers for permanent identification Small physical size for greater design flexibility
Standard
UL listed to standard 248-15 File E2137 CSA certified to standard C22.2 no. 248.15 DC listed to UL standard 248
Sub Brand
Amp-Trap®
Type
Class T
Voltage Rating
300 VAC
Package Dimensions (L x W x H)
2.44 in x 1.06 in x 1.06 in
Package Dimensions (L x W x H)
61.976 mm x 26.924 mm x 26.924 mm
Package Weight (Imperial)
0.161 lb
Package Weight (Metric)
0.073 kg
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POWR-JAW clamps improve the contact between fuse and clip. The unnecessary heat from poor contact due to the loss of spring force in the clips can cause nuisance fuse opening and premature aging of surrounding components. High temperature phenolic resin knob designed for the most severe environments 7 sizes to provide effective coverage. Simple design makes installation easy.

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Frequently Asked Questions about Mersen

What industries and applications are Mersen products used for?

Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.

What are the main product lines offered by Mersen?

Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.

What are the key features of Mersen products?

Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.

What environmental ratings do Mersen products have?

Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.

What accessories are available for Mersen products?

Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.

How are Mersen products typically installed?

Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.

What certifications and standards do Mersen products comply with?

Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.

What technical support does Mersen offer?

Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.