Mersen A25Z20-1 - 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 20 Amps A25Z series.
Mersen

A25Z20-1

Alternate Item Number: 782001942236

UPC: 782001942236

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Overview

The Mersen A25Z20-1 Amp-trap Semiconductor Protection Fuse (SKU: A25Z20-1) is a critical component engineered for the robust protection of sensitive power semiconductor devices. Designed by Mersen, a globally recognized leader in electrical protection solutions, this fuse is specifically intended to safeguard high-power electronic components such as diodes, phase control SCRs (Silicon Controlled Rectifiers), and other advanced power semiconductor elements. Its primary function is to provide fast-acting, reliable overcurrent protection, thereby preventing catastrophic damage to these valuable and often expensive components. With a substantial voltage rating of 250 Volts and a precise current rating of 20 Amps, the A25Z20-1 fuse is meticulously designed to interrupt fault currents rapidly, minimizing the duration of overcurrent events. This rapid interruption is paramount in protecting semiconductors, which are highly susceptible to damage from even brief exposure to excessive current or voltage surges. The A25Z series fuses are built to meet stringent industrial standards, ensuring consistent performance and reliability in demanding operational environments. These fuses are not merely protective devices; they are integral to maintaining the operational integrity and longevity of power electronic systems. Key features and benefits of the Mersen A25Z20-1 Amp-trap Semiconductor Protection Fuse include: * **Specialized Semiconductor Protection:** Tailored for the unique protection needs of diodes, SCRs, and other power semiconductor devices. * **High Interrupting Rating:** Capable of safely interrupting high fault currents, a crucial characteristic for semiconductor protection. * **Fast-Acting Response:** Designed to react swiftly to overcurrent conditions, minimizing damage to protected components. * **250V Voltage Rating:** Suitable for a wide range of industrial power systems operating at or below this voltage level. * **20A Current Rating:** Precisely calibrated for applications requiring 20 Amps of continuous current handling with overcurrent protection. * **Mersen Quality and Reliability:** Manufactured by Mersen, a trusted name synonymous with high-performance electrical protection. Applications for the A25Z20-1 fuse are diverse and span across numerous industrial sectors where power electronics play a vital role. This includes motor drives, uninterruptible power supplies (UPS), industrial power supplies, inverters, rectifiers, and renewable energy systems such as solar inverters and wind turbine converters. In these applications, the reliable operation of power semiconductors is essential for system efficiency and output. The A25Z20-1 fuse acts as a crucial line of defense, ensuring that system downtime due to component failure is minimized. When selecting semiconductor protection fuses, engineers and technicians prioritize devices that offer a high degree of selectivity, fast response times, and proven reliability. Mersen's Amp-trap fuses, including the A25Z20-1, consistently meet these critical requirements, offering peace of mind and robust protection for critical power electronic circuits. Trust in Mersen's expertise to safeguard your valuable semiconductor investments and maintain the seamless operation of your industrial equipment.
  • Designed for protection of power semiconductor devices (diodes, SCRs)
  • 250 Volts AC/DC voltage rating
  • 20 Amps current rating
  • Fast-acting overcurrent protection
  • Mersen Amp-trap® series for industrial applications

Specifications

Amperage Rating
20 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)
2 IN x 0.56 IN x 0.56 IN
Package Dimensions (L x W x H)
5.08 cm x 14.224 mm x 14.224 mm
Package Weight (Imperial)
0.040 L
Package Weight (Metric)
0.018 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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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.