Mersen A30QS225-4 - High Speed Fuse Amp-Trap® A30QS 300VAC 300VDC 225A Blade
Mersen

A30QS225-4

Alternate Item Number: A30QS225-4

UPC: 782001280819


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Overview

The Mersen A30QS225-4 Amp-Trap® high-speed fuse is engineered for the critical protection of power semiconductor devices. Designed for new applications, this fuse provides essential solutions for safeguarding diodes, phase control SCRs, and other sensitive power semiconductor components operating at 300V and below. Its current-limiting capabilities minimize damage to protected components during short circuits, thanks to a low I²t characteristic. The controlled arc voltage further reduces stress on circuit components during fuse clearing events. With ratings of 300VAC/DC and a 225A current rating, the A30QS series offers superior DC capabilities and fast-acting performance. It boasts an impressive interrupting rating of 200kA IR AC and 100kA IR DC, ensuring robust protection against fault conditions. The A30QS225-4 features a blade mounting type, facilitating integration into equipment designs. This UL recognized component (UL File E60314) is ideal for protecting heavy-duty rectifiers and similar power supplies. Key benefits include minimized damage on short circuit, reduced stress during clearing, and design flexibility through various mounting options. For applications requiring precise semiconductor protection at 300V or less, the Mersen A30QS225-4 delivers reliable and effective performance.
  • Designed for protection of power semiconductors (diodes, SCRs)
  • 300VAC/DC voltage rating
  • 225A current rating
  • 200kA IR AC / 100kA IR DC interrupting rating
  • Low I²t minimizes damage to protected components

Specifications

AC Voltage Rating
300 V
Amperage Rating
225 A
Application
Protection of 300V (or less) heavy duty rectifiers and similar heavy duty power supplies
Brand Name
Mersen
Case
GMG
Case Material
GMG
Connection
Blade
Current Rating
225A
DC Voltage Rating
300 V
Mounting
Bolted
Mounting
Bolt
Series
A30QS
Size
3.84 x 1.5 in
Size
97.536 x 38.1 mm
Size
3.84 x 1.5;97.536 x 38.1 in;mm
Special Features
Low I2t minimizes damage to protected component on short circuit Controlled arc voltage reduces stress to circuit components during fuse clearing Choice of mounting types helps in equipment design
Standard
UL recognized component UL File E60314 AC: UL guide no. JFHR2 (35-4500A)
Sub Brand
Amp-Trap®
Type
Round Body High-Speed Fuse-Links AC Protection
Voltage Rating
300 V
Voltage Rating
300 V V
Voltage Rating
300VAC 300VDC
Package Dimensions (L x W x H)
3.84 in x 1.5 in x 1.5 in
Package Dimensions (L x W x H)
97.536 mm x 38.1 mm x 38.1 mm
Package Weight (Imperial)
0.550 lb
Package Weight (Metric)
0.249 kg

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.