Mersen A50P250-4TA - High Speed Fuse Amp-Trap® A50P 500VAC 450VDC 250A Blade TA Indicator
Mersen

A50P250-4TA

Alternate Item Number: A50P250-4TA

UPC: 782001140649


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Overview

The Mersen Amp-Trap® A50P250-4TA is a specialized high-speed fuse engineered for critical protection applications, particularly within DC drives and Uninterruptible Power Supply (UPS) systems. This blade-type fuse, SKU A50P250-4TA, is rated for 500 Volts AC and 450 Volts DC, with a substantial 250 Ampere current rating. Its primary function is to provide precise I²t performance, ensuring superior fault protection and enhancing overall system reliability by minimizing energy let-through during fault events. Designed as a direct replacement for applications requiring lower I²t values to safeguard sensitive equipment, the A50P series offers an advantage over standard fuses in such scenarios. The integrated TA indicator flag allows for quick and easy visual confirmation of the fuse's status, significantly reducing downtime associated with maintenance and troubleshooting. Manufactured in the US, this fuse adheres to stringent industrial standards for DC applications, guaranteeing consistent and dependable operation in high-demand environments. Its compatibility with Mersen’s established Amp-Trap® product line ensures seamless integration into existing power systems. The clear fault indication provided by the TA indicator simplifies troubleshooting processes in complex power distribution networks.
  • 250A current rating for high-demand applications
  • 500VAC and 450VDC voltage ratings
  • TA indicator for quick visual fault status
  • Designed for DC drives and UPS systems
  • Precise I²t performance for sensitive equipment protection

Specifications

AC Voltage Rating
500 V
Amperage Rating
250 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
Current Rating
250A
DC Voltage Rating
450 V
Mounting
Bolted
Mounting
Bolt
Series
A50P Amp-Trap® Form 101
Size
Blade TA
Size
4.34 x 1.5;110.236 x 38.1 in;mm
Size
4.34 x 1.5 in
Size
110.236 x 38.1 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
Type Of Indicators
TA Indicator
Voltage Rating
500 V
Voltage Rating
500 V V
Package Dimensions (L x W x H)
4.34 in x 1.5 in x 1.5 in
Package Dimensions (L x W x H)
110.236 mm x 38.1 mm x 38.1 mm
Package Weight (Imperial)
0.720 lb
Package Weight (Metric)
0.327 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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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.