Mersen A70QS32-22FI - These Premium Amp-trap French Cylindrical Semiconductor Fuses are an extension of the popular A70QS product line. They are solid-fill 14mm and 22mm fuses IEC rated 690VAC, 200kA Interrupting and 700VDC, 100kA interrupting at 10ms time constant. In addition, these fuses have an 890 VDC rating for capacitor discharge applications up to 2.5ms time constant. All ampere ratings are available with a striker. Applications include small inverter drives and UPS systems, with superior I²t for improved protection and performance. 690 Volts 32 amps 22x58 ferrule w/striker.
Mersen

A70QS32-22FI

Alternate Item Number: 782001142247

UPC: 782001142247

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Overview

The **Mersen A70QS32-22FI Premium Amp-trap French Cylindrical Semiconductor Fuse** is a high-performance protection solution engineered for demanding industrial and power electronics applications. As an advanced extension of Mersen’s trusted **A70QS series**, this 32A fuse delivers unmatched reliability, precision, and safety in critical circuits where semiconductor protection is non-negotiable. Designed for **690V AC, 700V DC, and 890V DC capacitor discharge applications**, the A70QS32-22FI ensures robust performance across a wide range of voltage and current conditions, making it an ideal choice for engineers and technicians seeking superior I²t characteristics and interrupting ratings. This premium fuse features a **solid-fill 22x58mm cylindrical design with a ferrule connection and integrated striker**, providing a secure, low-resistance interface for high-integrity installations. The **200kA interrupting rating at 10ms for AC** and **100kA at 10ms for DC** (with an additional **890VDC rating for capacitor discharge up to 2.5ms**) underscores its capability to handle extreme fault conditions without compromising circuit integrity. The striker mechanism enhances safety by providing visual or mechanical indication of fuse operation, enabling quick diagnostics and minimizing downtime in critical systems. **Key applications** for the A70QS32-22FI include **small inverter drives, uninterruptible power supplies (UPS), motor controllers, and renewable energy systems**, where precise fault protection is essential to prevent catastrophic failures. Its **superior I²t performance** ensures rapid response to overcurrent events, protecting sensitive semiconductors from thermal damage while maintaining system stability. The **IEC-rated design** aligns with global standards, offering compatibility with a broad spectrum of industrial equipment and reducing the need for custom solutions. Mersen, a global leader in electrical protection and thermal management solutions, has built a reputation for innovation and reliability in the power electronics industry. The **A70QS series**, including the A70QS32-22FI, reflects decades of expertise in fuse technology, with a focus on **high interrupting capacity, low let-through energy, and long service life**. Professionals in **automation, renewable energy, and industrial machinery sectors** trust Mersen fuses to deliver consistent performance in environments where failure is not an option. **Installation and compatibility** are streamlined thanks to the **standardized 22x58mm ferrule design**, which ensures easy integration into existing fuse holders and panels. The **32A current rating** makes it suitable for medium-power applications, balancing protection with operational efficiency. Whether deployed in **high-voltage DC systems, AC motor drives, or capacitor banks**, the A70QS32-22FI provides a cost-effective, high-reliability solution that meets the stringent demands of modern power electronics. For engineers and procurement specialists, selecting the right fuse involves balancing **voltage ratings, interrupting capacity, physical dimensions, and application-specific requirements**. The A70QS32-22FI excels in all these areas, offering a **versatile, high-performance option** that reduces risk while optimizing system performance. With Mersen’s commitment to quality and innovation, this fuse represents a smart investment in long-term reliability and safety for critical infrastructure.
  • Rated for 690V AC, 700V DC, and 890V DC capacitor discharge applications
  • 200kA AC / 100kA DC interrupting rating at 10ms time constant
  • 22x58mm solid-fill cylindrical design with ferrule connection and striker
  • Superior I²t performance for enhanced semiconductor protection
  • Ideal for small inverter drives, UPS systems, and motor controllers

Specifications

Amperage Rating
32 A
Application
Small inverters, UPS systems, Solid State Relays, motor drives and similar 700V or less equipment
Brand Name
Ferraz Shawmut
Connection
Ferrule
Connection Type
Ferrule
Current Rating
32 A
Material
Solid-fill
Mounting
Clip
Series
A70QS
Size
22x58 mm
Special Features
International 14 x 51mm (2 In x 9/16 In) and 22 x 58mm (2-1/4 In x 13/16 In) sizes for worldwide acceptance Ferrule mount for design versatility Very low I2t for improved semiconductor protection 690V IEC rated, tested at 760VAC, can be used up to 750VAC in U.S. 700VDC rated for dc protection of equipment with L/R <= 10ms/c Superior cycling ability for longer life on difficult cyclic loading applications
Standard
UL Recognized Component CSA Certified IEC 269-4 Compliance
Type
North American Round Style
Type Of Indicators
Striker
Voltage Rating
690 VAC
Package Dimensions (L x W x H)
2.28 IN x 0.86 IN x 0.86 IN
Package Dimensions (L x W x H)
5.7912 cm x 21.844 mm x 21.844 mm
Package Weight (Imperial)
0.100 L
Package Weight (Metric)
0.045 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.

LCC5

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.
9F61 Size B Clips 1.6in

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9F61 Size B Clips 1.6in

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.