Mersen A25X4500-128 - 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 4500 Amps A25X series.
Mersen

A25X4500-128

Alternate Item Number: 782001942687

UPC: 782001942687

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Overview

The Mersen A25X4500-128 Amp-trap Semiconductor Protection Fuse is a critical component engineered for the robust protection of high-power semiconductor devices. Designed to safeguard sensitive electronics such as diodes, phase control SCRs (Silicon Controlled Rectifiers), and other advanced power semiconductor components, this fuse offers unparalleled reliability in demanding industrial environments. With a substantial current rating of 4500 Amps and a voltage rating of 250 Volts, the A25X series is specifically built to handle the significant electrical stresses inherent in power electronics applications. This fuse plays a vital role in preventing catastrophic failures by quickly interrupting overcurrent conditions, thereby protecting expensive semiconductor equipment from damage. Its precise tripping characteristics ensure that it operates only when necessary, minimizing downtime and maintenance costs. The A25X series from Mersen is renowned for its high interrupting capacity and low I²t values, which are crucial for limiting the energy let-through during a fault, thus providing superior protection for the semiconductor devices it guards. Applications for the Mersen A25X4500-128 are widespread across various industrial sectors. It is ideally suited for use in: * Variable speed drives (VSDs) * Uninterruptible Power Supplies (UPS) * DC drives * Power converters and inverters * Motor control centers * Industrial power supplies * Renewable energy systems (e.g., solar inverters, wind turbine converters) * Electric vehicle charging infrastructure Selecting the correct semiconductor protection fuse is paramount for system integrity and operational efficiency. Factors such as the semiconductor's peak repetitive current, surge current capabilities, and operating voltage must be carefully considered alongside the fuse's specifications. Mersen, a global leader in electrical protection and power management, leverages decades of expertise to develop fuses that meet the stringent requirements of modern power electronics. The A25X series exemplifies this commitment to quality and performance, offering peace of mind to engineers and maintenance professionals alike. By choosing the Mersen A25X4500-128, you are investing in a high-performance protection solution that ensures the longevity and optimal functioning of your critical power semiconductor assets. Its robust construction and advanced design make it a dependable choice for safeguarding against electrical faults, ensuring continuous operation and protecting your valuable equipment from costly damage. Trust in Mersen's legacy of innovation and reliability for all your industrial protection needs.
  • Designed for protection of Power Semiconductors (Diodes, Phase Control SCRs, etc.)
  • High current rating of 4500 Amps for demanding applications
  • Voltage rating of 250 Volts suitable for various industrial power systems
  • Mersen Amp-trap A25X series ensures reliable semiconductor protection
  • Engineered for high interrupting capacity and low energy let-through

Specifications

Amperage Rating
4500 A
Application
Protection of AC/DC drives, UPS and other equipment of 300 volts or less
Brand Name
Ferraz Shawmut
Special Features
250VAC rated Low I 2 t minimizes damage to protected component 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 Guide JFHR2 Some Ratings RoHS Compliant
Type
North American Round Style
Voltage Rating
250 VAC
Package Dimensions (L x W x H)
2.59 IN x 4.5 IN x 4.5 IN
Package Dimensions (L x W x H)
6.5786 cm x 11.43 cm x 11.43 cm
Package Weight (Imperial)
7.200 L
Package Weight (Metric)
3.266 kg
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Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

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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.