Mersen A25X40-4 - 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 40 Amps A25X series.
Mersen

A25X40-4

Alternate Item Number: 782001942304

UPC: 782001942304

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Overview

The Mersen A25X40-4 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 power semiconductor elements, this fuse offers unparalleled reliability in demanding industrial environments. With a precise voltage rating of 250V and a substantial current rating of 40A, the A25X40-4 ensures optimal operational integrity and safety for your valuable equipment. This fuse belongs to Mersen's esteemed A25X series, a line renowned for its fast-acting response and high interrupting capacity, specifically tailored for semiconductor protection applications. The primary function of the A25X40-4 is to swiftly and decisively interrupt fault currents, thereby preventing catastrophic damage to power semiconductors. Such protection is paramount in applications where rapid transient overcurrents or short circuits can occur, leading to costly downtime and repairs. Key features and benefits of the Mersen A25X40-4 include: * **Targeted Semiconductor Protection:** Specifically designed for the unique protection needs of diodes, SCRs, and other power semiconductor devices. * **Robust Voltage and Current Ratings:** A 250V rating and 40A current capacity make it suitable for a broad spectrum of industrial power systems. * **Fast-Acting Response:** Minimizes the duration of fault currents, significantly reducing the thermal stress on protected components. * **High Interrupting Capacity:** Capable of safely clearing severe short-circuit currents, ensuring system safety. * **Enhanced System Reliability:** By preventing semiconductor failure, it contributes to increased uptime and reduced maintenance costs. Industrial applications benefiting from the A25X40-4 are diverse and include motor drives, uninterruptible power supplies (UPS), welding equipment, industrial power supplies, and renewable energy systems. In these sectors, the integrity of power semiconductors is fundamental to system performance and longevity. Mersen's commitment to quality and innovation is evident in the A25X series, providing engineers with the confidence that their critical power electronics are adequately protected. Selecting the correct semiconductor protection fuse is a vital step in system design. Factors such as the rated voltage, continuous current, prospective short-circuit current, and the specific characteristics of the semiconductor device being protected must be carefully considered. The Mersen A25X40-4, with its well-defined specifications, simplifies this selection process for many common power semiconductor applications. Its construction is optimized for low $I^2t$ values, further minimizing the energy let-through during a fault event. Trust in Mersen's extensive experience and reputation for delivering high-performance electrical protection solutions. The A25X40-4 Amp-trap fuse is an investment in the reliability and longevity of your power electronic systems, safeguarding against costly failures and ensuring continuous operation. Its straightforward integration into standard fuse holders makes installation efficient, allowing for quick replacement and minimal disruption to operations. For critical power applications requiring dependable semiconductor protection, the Mersen A25X40-4 stands as a superior choice.
  • Mersen A25X40-4 Amp-trap Semiconductor Protection Fuse
  • Designed for Diodes, Phase Control SCRs, and other power semiconductors
  • Voltage Rating: 250 V
  • Current Rating: 40 A
  • A25X Series for fast-acting semiconductor protection

Specifications

Amperage Rating
40 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)
3.19 IN x 0.81 IN x 0.81 IN
Package Dimensions (L x W x H)
8.1026 cm x 20.574 mm x 20.574 mm
Package Weight (Imperial)
0.130 L
Package Weight (Metric)
0.059 kg
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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.

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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.