Mersen A25X150-4 - 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 150 Amps A25X series.
Mersen

A25X150-4

Alternate Item Number: 782001942540

UPC: 782001942540

Contact for Pricing

Overview

The Mersen A25X150-4 Amp-trap Semiconductor Protection Fuse is a high-performance, industrial-grade solution designed to safeguard critical power semiconductor devices against overcurrent and short-circuit conditions. Engineered for reliability and precision, this fuse is part of Mersen’s trusted A25X series, which is widely recognized in the power electronics industry for its superior protection capabilities. With a voltage rating of 250V and a current rating of 150A, the A25X150-4 is specifically tailored to protect sensitive components such as diodes, phase control SCRs, and other high-power semiconductor devices in demanding applications. Semiconductor protection fuses like the A25X150-4 play a pivotal role in modern industrial systems by ensuring operational safety and preventing catastrophic failures. Unlike standard fuses, semiconductor protection fuses are designed to respond rapidly to fault conditions, minimizing the risk of thermal runaway and component damage. This is critical in applications where power semiconductors are subjected to high inrush currents or transient overloads, such as in power conversion systems, motor drives, and renewable energy installations. The A25X150-4 fuse is ideal for a broad range of industrial applications, including: - Power electronics and converters - Industrial automation and motor control systems - Renewable energy systems (solar inverters, wind power converters) - Uninterruptible power supplies (UPS) - Electric vehicle charging infrastructure - High-power rectifiers and inverters Mersen’s A25X series fuses are engineered to meet the stringent demands of these applications, offering exceptional interrupting ratings and low let-through energy (I²t) to ensure minimal stress on protected components. The A25X150-4, in particular, is optimized for high-current semiconductor protection, making it a preferred choice for engineers and system designers who require dependable performance in harsh operating environments. Installation and selection of the A25X150-4 fuse should be guided by the specific requirements of the application. Professionals typically consider factors such as the semiconductor’s maximum rated current, voltage withstand capability, and the prospective short-circuit current of the system. Mersen provides comprehensive technical documentation, including time-current curves and application notes, to assist in proper fuse selection and coordination. The A25X150-4 is designed for use in fuse holders or fuse blocks that comply with industry standards, ensuring safe and reliable operation. As a leader in electrical protection solutions, Mersen has built a reputation for innovation and quality in the power semiconductor protection market. The company’s fuses are trusted by industries worldwide for their durability, precision, and adherence to international safety standards. Whether deployed in a factory automation system, a renewable energy installation, or a critical power distribution network, the Mersen A25X150-4 Amp-trap Semiconductor Protection Fuse delivers the performance and reliability that engineers demand. For applications where semiconductor protection is non-negotiable, the A25X150-4 stands as a benchmark for excellence.
  • 250V voltage rating for medium-voltage semiconductor protection
  • 150A current rating for high-power applications
  • Rapid response to overcurrent conditions to prevent semiconductor damage
  • Part of Mersen’s trusted A25X series for industrial reliability
  • Compatible with power electronics, motor drives, and renewable energy systems

Specifications

Brand Name
Ferraz Shawmut
Current Rating
150 A
Series
A25X
Voltage Rating
250 V
Package Dimensions (L x W x H)
3.13 IN x 1.22 IN x 1.22 IN
Package Dimensions (L x W x H)
7.9502 cm x 3.0988 cm x 3.0988 cm
Package Weight (Imperial)
0.380 L
Package Weight (Metric)
0.172 kg
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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.