Mersen A25Z250-4 - 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 250 Amps A25Z series.
Mersen

A25Z250-4

Alternate Item Number: 782001942717

UPC: 782001942717

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Overview

The Mersen A25Z250-4 Amp-trap Semiconductor Protection Fuse is a critical component engineered to provide superior protection for sensitive power semiconductor devices. Designed with precision and reliability in mind, this fuse is specifically intended for safeguarding high-power components such as diodes, phase control SCRs (Silicon Controlled Rectifiers), and other advanced power semiconductor elements. With a robust voltage rating of 250V and a substantial current rating of 250A, the A25Z250-4 offers dependable defense against damaging overcurrents and catastrophic short-circuit events. In industrial environments, the integrity of power semiconductor devices is paramount to the operational efficiency and longevity of complex electrical systems. These devices, often operating under demanding conditions, are susceptible to transient surges and fault currents that can lead to premature failure, costly downtime, and potential safety hazards. The Mersen A25Z series, including the A25Z250-4, is meticulously designed to interrupt these fault currents rapidly and effectively, thereby minimizing energy let-through and protecting the connected semiconductor components from irreversible damage. This proactive protection strategy is essential for maintaining system stability and ensuring uninterrupted production cycles. The A25Z250-4 fuse is a testament to Mersen's commitment to delivering high-performance electrical protection solutions. Its construction adheres to stringent quality standards, ensuring consistent and predictable performance even in the most challenging industrial applications. Key benefits of integrating the Mersen A25Z250-4 into your system include: * **Enhanced Semiconductor Longevity:** By quickly isolating fault conditions, the fuse significantly extends the operational life of expensive power semiconductor devices. * **Reduced Downtime:** Preventing device failure translates directly into fewer unplanned outages and improved overall equipment effectiveness (OEE). * **System Reliability:** The fuse acts as a crucial safeguard, contributing to the overall stability and reliability of power electronic systems. * **Precision Protection:** Engineered for specific semiconductor protection needs, offering optimal performance characteristics. * **Trusted Manufacturer:** Mersen is a globally recognized leader in electrical protection, known for its innovative and dependable product portfolio. This fuse is an ideal choice for a wide array of industrial sectors, including motor drives, power supplies, renewable energy systems (solar inverters, wind turbines), industrial automation, and any application where robust protection of power semiconductors is a non-negotiable requirement. The A25Z series is recognized for its fast-acting characteristics and high interrupting ratings, making it suitable for applications with high fault current potential. When selecting semiconductor protection fuses, professionals rely on the precise specifications and proven performance of Mersen products to ensure the safety and efficiency of their critical infrastructure. The A25Z250-4, with its specific voltage and current ratings, is a prime example of Mersen's dedication to providing tailored solutions for advanced electrical protection needs.
  • Designed for superior protection of power semiconductor devices
  • Safeguards diodes, phase control SCRs, and other high-power semiconductors
  • 250V voltage rating and 250A current rating for robust fault interruption
  • Fast-acting characteristics to minimize damage from overcurrents and short circuits
  • Engineered by Mersen, a trusted leader in electrical protection solutions

Specifications

Amperage Rating
50 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)
3.84 IN x 1.5 IN x 1.5 IN
Package Dimensions (L x W x H)
9.7536 cm x 3.81 cm x 3.81 cm
Package Weight (Imperial)
0.650 L
Package Weight (Metric)
0.295 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.

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

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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.