Mersen A100P125-4 - High Speed Fuse Amp-Trap® A100P 1000VAC 750VDC 125A Bolted Blade
Mersen

A100P125-4

Alternate Item Number: A100P125-4

UPC: 782001948542


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Overview

The Mersen A100P125-4 is a high-speed Amp-Trap® Form 101 fuse designed for critical protection in demanding industrial applications. Rated for 1000VAC and 750VDC, this 125A fuse with a bolted blade connection offers superior reliability and minimizes damage to protected components through its low I2t characteristic. Its current-limiting capability and controlled arc voltage reduce stress on circuit components during fuse clearing events. This fuse is specifically engineered for the protection of UPS systems, AC and DC drives, and reduced voltage motor starters, where precise and fast-acting overcurrent protection is paramount. The A100P series extends protection capabilities to a wide range of high-voltage applications. Featuring a 100kA interrupting rating (IR) and a 25ms let-through (LR), the A100P125-4 ensures robust performance. It is UL recognized as a component (File E60314). For applications requiring visual indication of fuse status, optional trigger indicator (TI) versions are available. Mersen's commitment to quality ensures that this fuse meets stringent performance standards for semiconductor protection. SKU: A100P125-4. Country of Origin: US.
  • 125A Current Rating
  • 1000VAC / 750VDC Voltage Rating
  • Bolted Blade Connection Type
  • Low I2t for minimized component damage
  • UL Recognized Component (File E60314)

Specifications

AC Voltage Rating
1000 V
Amperage Rating
125 A
Application
Protection of UPS systems AC/DC drives, reduced voltage motor starters and other 1000V or less semiconductor devices
Brand Name
Mersen
Case
GMG
Case Material
GMG
Connection
Blade
Mounting
Bolt
Mounting
Bolted
Size
5.72 x 1.5 in
Size
145.288 x 38.1 mm
Size
5.72 x 1.5;145.288 x 38.1 in;mm
Special Features
Low I2t minimizes damage to protected components on short circuit Controlled arc voltage reduces stress to circuit components during fuse clearing Wide range of ampere ratings
Standard
UL recognized component File E60314 AC: UL guide no. JFHR2 (35-600A) DC: self-certified
Sub Brand
Amp-Trap®
Type
Round Body High-Speed Fuse-Links AC Protection
Voltage Rating
1000 V
Voltage Rating
1000 V V
Package Dimensions (L x W x H)
5.72 in x 1.5 in x 1.5 in
Package Dimensions (L x W x H)
145.288 mm x 38.1 mm x 38.1 mm
Package Weight (Imperial)
0.870 lb
Package Weight (Metric)
0.395 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.