Mersen A25X550-4 - A25X Amp-trap Semiconductor Protection fuses are intended for the protection of Power Semiconductors such as Diodes, Phase Control SCR's and other power Semiconductor devices 250 Volts 550 Amps A25X series.
Mersen

A25X550-4

Alternate Item Number: 782001942779

UPC: 782001942779

Contact for Pricing

Overview

Safeguard your critical power semiconductor devices with the Mersen A25X550-4 Amp-trap Semiconductor Protection Fuse. Engineered for demanding industrial environments, this high-performance fuse is specifically designed to provide superior protection for sensitive components such as diodes, phase control SCRs, and other high-power semiconductor devices. With a robust 250 Volt rating and a substantial 550 Amp current capacity, the A25X550-4 is built to handle significant electrical loads while ensuring rapid and reliable fault interruption. The Mersen A25X series represents a commitment to advanced semiconductor protection technology. These fuses are characterized by their fast-acting response, which is crucial for minimizing damage to expensive power electronics during overcurrent or short-circuit events. By quickly isolating the fault, the A25X550-4 helps prevent catastrophic failures, thereby reducing costly downtime and extending the operational lifespan of your equipment. This level of protection is indispensable in applications where system reliability and operational continuity are paramount. Key features and benefits of the Mersen A25X550-4 include: * **Specialized Semiconductor Protection:** Tailored to the unique needs of diodes, SCRs, and other power semiconductor components, offering precise and effective safeguarding. * **High Interrupting Rating:** Designed to safely clear fault currents, protecting downstream equipment from severe damage. * **Fast-Acting Response:** Minimizes the duration of overcurrent events, significantly reducing thermal stress on protected devices. * **Durable Construction:** Built with high-quality materials to withstand harsh industrial conditions and ensure long-term performance. * **Voltage and Current Ratings:** A 250V rating and 550A capacity make it suitable for a wide range of medium-voltage power applications. Industries that rely on the Mersen A25X550-4 for their power electronic systems include motor drives, industrial power supplies, renewable energy inverters, and traction systems. The selection of an appropriate semiconductor protection fuse is a critical step in the design and maintenance of any power electronic circuit. Factors such as the continuous current rating, the peak let-through current, and the clearing $I^2t$ are all vital considerations. Mersen, a globally recognized leader in electrical protection and power management, brings decades of expertise to the development of its Amp-trap fuses, ensuring that professionals can trust their products for the most critical applications. The A25X550-4, with its SKU A25X550-4, embodies this dedication to quality and reliability, providing peace of mind and robust protection for your valuable semiconductor assets. Choosing Mersen means investing in proven technology and unparalleled support for your electrical infrastructure.
  • Mersen A25X550-4 Amp-trap Semiconductor Protection Fuse
  • Designed for Diodes, Phase Control SCRs, and other power semiconductor devices
  • 250 Volt rating
  • 550 Amp current rating
  • Fast-acting protection to minimize damage and downtime

Specifications

Brand Name
Ferraz Shawmut
Current Rating
550 A
Series
A25X
Voltage Rating
250 V
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)
9.7536 cm x 3.81 cm x 3.81 cm
Package Weight (Imperial)
0.700 L
Package Weight (Metric)
0.318 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.