Mersen A25Z80-4 - A25Z 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 80 Amps A25Z series.
Mersen

A25Z80-4

Alternate Item Number: 782001942366

UPC: 782001942366

Contact for Pricing

Overview

The Mersen A25Z80-4 Amp-trap Semiconductor Protection Fuse is a high-performance, fast-acting fuse designed to safeguard critical power semiconductor devices in industrial and commercial applications. Engineered for the protection of diodes, phase control SCRs, and other high-power semiconductor components, this fuse delivers reliable overcurrent protection with a voltage rating of 250V and a current rating of 80A. Part of Mersen’s renowned A25Z series, this fuse is built to meet the stringent demands of modern power electronics, where precision, durability, and safety are paramount. Power semiconductor devices are the backbone of modern electrical systems, including motor drives, power supplies, renewable energy inverters, and industrial automation equipment. These components are highly sensitive to overcurrent conditions, which can lead to catastrophic failure, reduced system reliability, and costly downtime. The Mersen A25Z80-4 Amp-trap fuse addresses this challenge by providing ultra-fast response times, effectively isolating fault conditions before they escalate. Its semiconductor-grade design ensures minimal let-through energy (I²t), protecting sensitive devices from thermal and mechanical stress. The A25Z80-4 is particularly well-suited for applications where rapid fault clearance is essential, such as in: - **Motor drives and variable frequency drives (VFDs):** Protecting IGBTs, thyristors, and other power semiconductor switches from short circuits and overloads. - **Power conversion systems:** Including solar inverters, wind turbine converters, and uninterruptible power supplies (UPS), where semiconductor reliability directly impacts energy efficiency and system longevity. - **Industrial automation and control systems:** Safeguarding PLCs, relays, and other high-power semiconductor-based components in harsh operating environments. - **Traction and transportation systems:** Such as electric vehicle chargers, rail traction systems, and elevator drives, where consistent performance and safety are critical. Mersen, a global leader in electrical protection solutions, has designed the A25Z series to exceed industry standards for semiconductor fuse performance. The A25Z80-4 features a robust construction with silver-plated fuse elements, ensuring low resistance and consistent operation across a wide temperature range. Its compact design allows for easy integration into existing fuse holders and switchgear, while compliance with international standards (such as UL, IEC, and CSA) guarantees compatibility with global electrical systems. Professionals in electrical engineering, maintenance, and system design rely on Mersen’s expertise to select the right protection components for their applications. The A25Z80-4 is not just a fuse—it is a critical component in a comprehensive protection strategy that enhances system reliability, reduces maintenance costs, and extends the lifespan of expensive semiconductor devices. Whether deployed in new installations or as part of an upgrade to existing systems, this fuse delivers the performance and peace of mind that engineers and facility managers demand. For industries where downtime is not an option, the Mersen A25Z80-4 Amp-trap Semiconductor Protection Fuse is the trusted choice for safeguarding power electronics. Trust Mersen to deliver solutions that keep your systems running safely and efficiently, today and in the future.
  • 250V voltage rating for high-power semiconductor protection
  • 80A current rating for robust overcurrent handling
  • Fast-acting design minimizes let-through energy (I²t)
  • Silver-plated fuse elements for low resistance and reliability
  • Compliant with UL, IEC, and CSA international standards

Specifications

Amperage Rating
80 A
Application
Protection of AC/DC drives, UPS and other equipment of 300 volts or less
Brand Name
Ferraz Shawmut
Current Rating
80 A
Material
Silver-plated fuse elements, ceramic or high-performance polymer housing
Mounting Type
Compact design for fuse holders and switchgear
Series
A25Z
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)
3.13 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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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.