Mersen A70Q250-4 - High Speed Fuse Amp-Trap® A70Q 700VAC 650VDC 250A Bolted Blade
Mersen

A70Q250-4

Alternate Item Number: A70Q250-4

UPC: 782001140991


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Overview

The Mersen A70Q250-4 Amp-Trap® high-speed fuse, SKU A70Q250-4, is engineered for critical inverter applications demanding exceptionally low I²t values. This fuse provides highly responsive protection, making it ideal for systems where sustained heavy overloads are not a primary concern, and is frequently utilized for replacement purposes. It features a 700VAC and 650VDC voltage rating, accommodating a broad spectrum of circuits. The A70Q series offers the lowest I²t among fuses in its voltage class, ensuring superior protection. Key specifications include an ampere rating of 250A and an interrupting rating (IR) of 100kA AC/DC. Constructed with solid fill technology for enhanced reliability, this fuse is UL recognized (File E60314, guide no JFHR2 for AC, tested to UL standard 198L parameters for DC). Dimensions for the A70Q250 to 400 series are 5.09 inches (129mm) in length (A), with a blade width (D) of 4.00 inches (102mm). This Mersen fuse is designed for applications requiring the best AC or DC protection within the 700V/650V range, such as inverters and similar equipment.
  • Lowest I²t for superior protection in inverter applications
  • 700VAC / 650VDC voltage rating for versatile circuit protection
  • 250A current rating with 100kA AC/DC interrupting rating
  • Solid fill technology ensures enhanced reliability
  • UL Recognized Component (File E60314)

Specifications

AC Voltage Rating
700 V
Amperage Rating
250 A
Application
Protection of inverters and other equipment requiring the best AC or DC protection in this voltage range
Brand Name
Mersen
Case
GMG
Case Material
GMG
Connection
Blade
Connection Type
Bolted Blade
Current Rating
250A
DC Voltage Rating
650 V
Mounting
Bolted
Mounting
Bolt
Series
A70Q
Size
5.09 x 2 in
Size
129.286 x 50.8 mm
Size
5.09 x 2;129.286 x 50.8 in;mm
Special Features
Lowest I2t of any fuse in this voltage rating for best overall protection 700V AC, 650V DC rating allows protection of greater variety of circuits Solid fill technology for extra reliability in performance
Standard
UL recognized component UL File E60314 AC: guide no. JFHR2 DC: tested to UL standard 198L parameters (35-600A)
Sub Brand
Amp-Trap®
Type
Round Body High-Speed Fuse-Links AC Protection
Voltage Rating
700 V
Voltage Rating
700 V V
Voltage Rating
700VAC 650VDC
Package Dimensions (L x W x H)
5.09 in x 2 in x 2 in
Package Dimensions (L x W x H)
129.286 mm x 50.8 mm x 50.8 mm
Package Weight (Imperial)
0.950 lb
Package Weight (Metric)
0.431 kg
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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.