Mersen A70QS40-22FI - 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 40 amps 22x58 ferrule w/striker.
Mersen

A70QS40-22FI

Alternate Item Number: 782001142254

UPC: 782001142254

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Overview

The Mersen A70QS40-22FI represents a significant advancement in semiconductor protection, extending the highly regarded A70QS product line with premium French cylindrical semiconductor fuses. Engineered for demanding industrial environments, this specific model, SKU A70QS40-22FI, is a 40 Amp, 690 Volt AC fuse featuring a 22x58mm ferrule and integrated striker mechanism. Its robust construction includes a solid-fill design, contributing to its exceptional performance and reliability. This fuse is meticulously designed to meet stringent IEC rating standards, offering an impressive 200kA interrupting capacity at 690VAC. Furthermore, it provides robust DC protection with a 700VDC rating and a 100kA interrupting capacity at a 10ms time constant. A key differentiator for the A70QS40-22FI is its specialized 890 VDC rating, specifically tailored for capacitor discharge applications, capable of handling transients up to a 2.5ms time constant. This makes it an ideal choice for systems where rapid energy discharge is a critical factor. The applications for the Mersen A70QS40-22FI are diverse and critical within industrial automation and power systems. It is particularly well-suited for protecting small inverter drives, where precise and rapid fault interruption is essential to prevent damage to sensitive power electronics. Additionally, its capabilities make it a superior choice for Uninterruptible Power Supply (UPS) systems, ensuring continuous power delivery and safeguarding critical loads during power disturbances. The superior I²t characteristics of this fuse translate directly into improved protection and enhanced operational performance for the equipment it safeguards. Key features and benefits of the Mersen A70QS40-22FI include: * **High Interrupting Capacity:** 200kA at 690VAC and 100kA at 700VDC (10ms time constant) provide robust protection against severe short-circuit events. * **Specialized Capacitor Discharge Rating:** 890 VDC for capacitor discharge applications up to 2.5ms time constant, offering enhanced safety and reliability in these specific scenarios. * **Superior I²t Performance:** Minimizes thermal stress on protected components, leading to improved equipment longevity and operational efficiency. * **Integrated Striker:** Facilitates easy detection of fuse operation and simplifies replacement procedures in industrial control panels. * **Solid-Fill Construction:** Enhances durability and performance under high fault conditions. * **French Cylindrical Design:** Meets specific international standards and form factors required in many global installations. When selecting semiconductor fuses, professionals prioritize reliability, precise tripping characteristics, and the ability to withstand the unique demands of power electronic circuits. Mersen, a globally recognized leader in electrical protection and power management, consistently delivers products that meet and exceed these expectations. The A70QS40-22FI, with its advanced specifications and Mersen's commitment to quality, offers peace of mind and dependable protection for critical industrial infrastructure. Its availability in various ampere ratings, including this 40A variant, ensures a tailored solution for a wide range of system requirements.
  • Mersen A70QS40-22FI Premium Amp-trap French Cylindrical Semiconductor Fuse
  • 40 Ampere, 690VAC, 22x58mm ferrule with integrated striker
  • IEC rated: 200kA interrupting at 690VAC, 100kA at 700VDC (10ms)
  • Specialized 890 VDC rating for capacitor discharge (up to 2.5ms time constant)
  • Ideal for small inverter drives, UPS systems, and applications requiring superior I²t protection

Specifications

Amperage Rating
40 A
Application
Small inverters, UPS systems, Solid State Relays, motor drives and similar 700V or less equipment
Brand Name
Ferraz Shawmut
Connection
Ferrule
Mounting
Clip
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
Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount

GPM-SRR90

Fuse Block 600VAC 600VDC Class CC 30A 1/4in Quick Connect / Solder 90 angle screw Knob Panel Mount
Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

C331156

Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

1SCM8

Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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

9F61BWW460

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.