Mersen A25X800-128 - 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 800 Amps A25X (type 128) series.
Mersen

A25X800-128

Alternate Item Number: 782001942809

UPC: 782001942809

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Overview

The Mersen A25X800-128 Amp-trap Semiconductor Protection Fuse is a critical component engineered for the robust protection of sensitive power semiconductor devices. Designed to safeguard diodes, phase control SCRs, and a wide array of other high-power semiconductor components, this fuse offers unparalleled reliability in demanding industrial environments. With a substantial current rating of 800 Amps and a voltage rating of 250 Volts, the A25X800-128 is specifically built to handle the significant electrical stresses encountered in modern power electronics systems. As part of Mersen's distinguished A25X (type 128) series, this fuse embodies the manufacturer's commitment to advanced protection solutions. These fuses are not merely circuit breakers; they are precision instruments designed to offer extremely fast-acting interruption capabilities, minimizing damage to expensive semiconductor equipment during fault conditions. The primary function of the A25X800-128 is to isolate the protected semiconductor device from overcurrents and short circuits, thereby preventing catastrophic failure and ensuring operational continuity. This is particularly vital in applications such as motor drives, uninterruptible power supplies (UPS), welding equipment, and industrial power supplies where semiconductor reliability is paramount. Selecting the correct semiconductor protection fuse is a crucial step in system design. Factors such as the continuous current rating of the semiconductor device, its peak surge current capability, and the expected fault current levels of the system must be carefully considered. The Mersen A25X800-128, with its 800A rating, is suitable for applications requiring substantial current handling capacity. Its 250V rating makes it appropriate for a broad spectrum of industrial power systems. The A25X series is known for its low I²t values, signifying its ability to absorb and dissipate fault energy efficiently, further protecting the semiconductor. Key features and benefits of the Mersen A25X800-128 include: * **Superior Semiconductor Protection:** Specifically designed to protect diodes, SCRs, and other power semiconductor devices from damaging overcurrents and short circuits. * **High Current and Voltage Ratings:** Features an 800A current rating and a 250V voltage rating, suitable for robust industrial power applications. * **Fast-Acting Interruption:** Provides rapid response to fault conditions, minimizing damage to critical semiconductor components. * **Low I²t Values:** Efficiently absorbs and dissipates fault energy, enhancing device longevity. * **Mersen Quality and Reliability:** Manufactured by Mersen, a globally recognized leader in electrical protection and power management solutions, ensuring trusted performance. Installation of these fuses typically occurs within specialized fuse holders designed for semiconductor protection fuses, ensuring proper contact and heat dissipation. The A25X800-128, SKU A25X800-128, represents a commitment to safeguarding your valuable power electronics infrastructure. Trust Mersen's decades of expertise to provide the ultimate protection for your critical semiconductor devices, ensuring maximum uptime and operational efficiency in your industrial processes.
  • Mersen A25X800-128 Amp-trap Semiconductor Protection Fuse
  • 250 Volts, 800 Amps current rating
  • Designed for Diodes, Phase Control SCRs, and other power semiconductor devices
  • A25X (type 128) series for advanced protection
  • Ensures optimal performance and safety in industrial applications

Specifications

Brand Name
Ferraz Shawmut
Package Dimensions (L x W x H)
2.59 IN x 3 IN x 3 IN
Package Dimensions (L x W x H)
6.5786 cm x 7.62 cm x 7.62 cm
Package Weight (Imperial)
3.000 L
Package Weight (Metric)
1.361 kg
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Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

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9F61 Size B Clips 1.6in

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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.

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.