Mersen A25X25-1 - 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 25 Amps A25X series.
Mersen

A25X25-1

Alternate Item Number: 782001942229

UPC: 782001942229

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Overview

The Mersen A25X25-1 Amp-trap Semiconductor Protection Fuse is a high-performance, fast-acting fuse designed to safeguard critical power semiconductor devices in industrial and commercial applications. Engineered for 250V and 25A ratings, this fuse provides precise overcurrent protection for diodes, phase control SCRs, and other sensitive semiconductor components, ensuring operational reliability and preventing costly downtime. As part of Mersen’s renowned A25X series, this fuse is built to meet the rigorous demands of modern power electronics, where rapid fault response and thermal stability are paramount. Semiconductor protection fuses like the A25X25-1 are essential in applications where power semiconductors are exposed to transient overcurrents or short-circuit conditions. These fuses operate by interrupting fault currents before they can damage sensitive components, such as in variable frequency drives (VFDs), motor controllers, uninterruptible power supplies (UPS), and industrial rectifiers. The A25X series is specifically optimized for semiconductor applications, offering a lower let-through energy (I²t) compared to standard fuses, which minimizes stress on protected devices during fault events. This makes it an ideal choice for protecting high-value power electronics in industries such as manufacturing, renewable energy, transportation, and data centers. One of the key advantages of the Mersen A25X25-1 is its fast-acting response, which is critical for semiconductor protection. Unlike general-purpose fuses, which may have slower response times, the A25X series is engineered to react within milliseconds to overcurrent conditions, reducing the risk of thermal runaway or catastrophic failure in protected devices. The fuse’s design also ensures low power dissipation during normal operation, contributing to energy efficiency and system stability. Additionally, the A25X25-1 is UL Listed and meets international safety standards, providing peace of mind for engineers and technicians working in regulated industries. Installation and selection of semiconductor protection fuses require careful consideration of several factors, including voltage rating, current rating, and the specific characteristics of the protected semiconductor. The A25X25-1 is rated for 250V and 25A, making it suitable for a wide range of medium-voltage applications. When selecting a fuse, professionals should match the fuse’s I²t rating to the semiconductor’s withstand capability, ensuring optimal protection without unnecessary tripping. Mersen’s A25X series is widely trusted in the industry for its consistency, reliability, and compatibility with leading semiconductor manufacturers, making it a preferred choice for OEMs and system integrators. Mersen, a global leader in electrical protection solutions, has decades of experience in developing advanced fuse technologies for power electronics. The company’s Amp-trap line, including the A25X25-1, is trusted by engineers worldwide for its superior performance in demanding environments. Whether protecting high-power diodes in a solar inverter, SCRs in a traction system, or thyristors in an industrial heater, Mersen’s semiconductor protection fuses deliver the precision and durability required for mission-critical applications. For professionals seeking a trusted, high-quality fuse for semiconductor protection, the Mersen A25X25-1 Amp-trap fuse is a proven solution that enhances system safety, reliability, and longevity.
  • Fast-acting protection for diodes, SCRs, and power semiconductors
  • Rated for 250V and 25A, optimized for industrial power systems
  • Low I²t rating minimizes stress on protected components
  • UL Listed and meets international safety standards
  • Part of Mersen’s trusted Amp-trap series for semiconductor applications

Specifications

Brand Name
Ferraz Shawmut
Package Dimensions (L x W x H)
2 IN x 0.56 IN x 0.56 IN
Package Dimensions (L x W x H)
5.08 cm x 14.224 mm x 14.224 mm
Package Weight (Imperial)
0.040 L
Package Weight (Metric)
0.018 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.