Mersen A50P900-4 - High Speed Fuse Amp-Trap® A50P 500VAC 450VDC 900A Blade
Mersen

A50P900-4

Alternate Item Number: A50P900-4

UPC: 782001947866


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Overview

The Mersen A50P900-4 Amp-Trap® Form 101 high speed fuse is a direct replacement solution for critical protection in DC drives, uninterruptible power supplies (UPS), and similar high-power industrial applications. Rated at 500VAC and 450VDC with a 900A current capacity, this blade-type fuse delivers precise fault interruption to safeguard sensitive electrical infrastructure. Its lower I²t rating minimizes thermal stress on equipment during fault conditions, reducing damage risk compared to standard fuses. The A50P series is designed for seamless integration into existing systems, offering a straightforward upgrade path without system modifications. With a robust construction and reliable performance, this fuse ensures operational continuity in demanding environments where downtime is costly. The 900A rating makes it suitable for high-current industrial applications, providing dependable protection for valuable electrical assets.
  • Voltage rating: 500VAC / 450VDC for versatile application compatibility
  • Current rating: 900A for high-power industrial environments
  • Blade connection type for direct replacement in existing systems
  • Lower I²t rating minimizes equipment damage during fault conditions
  • Designed for DC drives, UPS, and similar critical protection applications

Specifications

AC Voltage Rating
500 V
Amperage Rating
900 A
Application
Protection of DC drives, UPS and other equipment of 500 volts or less
Brand Name
Mersen
Case
GMG
Case Material
GMG
Connection
Blade
Connection Type
Blade
Current Rating
900A
DC Voltage Rating
450 V
Mounting
Bolted
Mounting
Bolt
Series
A50P Amp-Trap® Form 101
Size
6.97 x 3;177.038 x 76.2 in;mm
Size
6.97 x 3 in
Size
177.038 x 76.2 mm
Special Features
Low I2t minimizes damage to protected components 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 60314 AC: UL Guide No. JFHR2 (10-800A) DC: UL Guide No.JFHR2 (35-800A)
Sub Brand
Amp-Trap®
Type
Round Body High-Speed Fuse-Links AC Protection
Voltage Rating
500 V
Voltage Rating
500 V V
Package Dimensions (L x W x H)
6.97 in x 3 in x 3 in
Package Dimensions (L x W x H)
177.038 mm x 76.2 mm x 76.2 mm
Package Weight (Imperial)
4.800 lb
Package Weight (Metric)
2.177 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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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.

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.