Authorized Mersen Distributor
Mersen A25X300-4 - 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 300 Amps A25X series.

Mersen A25X300-4 A25X Amp-trap Semiconductor Protection fuses are intended for the protection of Power…

Alternate Item Number: 782001942663

UPC: 782001942663

Contact for Pricing

Call +1 (262) 252-1600 (toll-free 877-268-3700) or email [email protected] for pricing and availability.

Overview

The Mersen A25X300-4 Amp-trap Semiconductor Protection Fuse is a high-performance, industrial-grade solution designed to safeguard critical power semiconductor devices in demanding applications. Engineered for reliability and precision, this fuse provides essential overcurrent protection for diodes, phase control SCRs, and other high-power semiconductor components operating at 250 volts and 300 amperes. As part of Mersen’s renowned A25X series, the A25X300-4 fuse delivers fast-acting response times to prevent catastrophic failure, ensuring operational continuity and minimizing costly downtime in mission-critical systems. Power semiconductor devices are the backbone of modern industrial electronics, powering everything from motor drives and inverters to renewable energy systems and industrial automation equipment. These components are highly sensitive to overcurrent conditions, which can result from short circuits, transient surges, or faulty operation. Without proper protection, even a brief overcurrent event can lead to thermal runaway, permanent damage, or complete system failure. The Mersen A25X300-4 fuse is specifically designed to address these risks by providing precise, high-speed interruption of fault currents, thereby preserving the integrity of sensitive semiconductor devices and extending the lifespan of connected equipment. The A25X300-4 fuse is ideal for a wide range of industrial applications where power semiconductors are deployed. Common use cases include: - **Motor drives and variable frequency drives (VFDs):** Protecting IGBTs, MOSFETs, and thyristors in high-power motor control systems. - **Power conversion systems:** Safeguarding components in solar inverters, wind turbine converters, and uninterruptible power supplies (UPS). - **Industrial automation:** Ensuring reliability in PLCs, robotics, and automated manufacturing lines. - **Traction systems:** Providing protection in electric vehicle (EV) charging stations and rail transit systems. - **Heavy machinery and industrial equipment:** Shielding semiconductors in welding machines, induction heaters, and other high-current applications. Selecting the right semiconductor fuse is a critical decision that impacts both safety and performance. Professionals in the field prioritize fuses that offer a balance of fast response, high interrupting rating, and low let-through energy (I²t). The Mersen A25X300-4 excels in these areas, featuring a robust design that meets stringent industry standards, including UL and IEC certifications. Its high interrupting rating ensures it can safely interrupt fault currents in high-energy systems, while its low I²t value minimizes stress on protected components during fault conditions. Installation and maintenance of semiconductor fuses require careful consideration to ensure optimal performance. The A25X300-4 is designed for easy integration into existing protection schemes, with compatibility across Mersen’s A25X series fuse holders and accessories. Proper mounting, torque specifications, and thermal management are essential to maintain the fuse’s reliability over time. Mersen provides comprehensive technical documentation and support to assist engineers in selecting, installing, and maintaining their semiconductor protection solutions. Mersen’s reputation as a leader in electrical protection solutions is built on decades of innovation and expertise. With a global presence and a commitment to quality, Mersen has earned the trust of professionals across industries, from manufacturing and energy to transportation and infrastructure. The A25X300-4 fuse is a testament to this legacy, offering a combination of performance, durability, and compliance with international standards. For engineers and procurement professionals seeking a reliable semiconductor protection solution, the Mersen A25X300-4 Amp-trap fuse stands as a trusted choice for safeguarding critical power electronics.
  • 250V voltage rating for industrial power semiconductor protection
  • 300A current rating for high-power applications
  • Fast-acting interruption to prevent semiconductor damage
  • UL and IEC certified for global compliance
  • Compatible with Mersen A25X series fuse holders

Specifications

Brand Name
Ferraz Shawmut
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)
0.650 L
Package Weight (Metric)
0.295 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 Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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 600VAC 600VDC Class CC 30A 3-Pole Pressure Plate with Reinforced Clip

30323R

Fuse Block 600VAC 600VDC Class CC 30A 3-Pole Pressure Plate with Reinforced Clip
9F61 Size B Clips 1.6in

9F61BWW460

9F61 Size B Clips 1.6in
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.

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.