Mersen A150C125-20 - Medium Voltage Capacitor Fuse 1500VAC 125A Male Stud To L Bracket Visual Indicator Amp-Trap®
Mersen

A150C125-20

Alternate Item Number: A150C125-20

UPC: 782001353797


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Overview

The Mersen A150C125-20 is a Medium Voltage Capacitor Fuse engineered for essential protection of capacitor banks. Designed to ANSI C37-41 standards, this current-limiting fuse operates silently and without discharge, making it suitable for indoor or outdoor applications when housed within a weatherproof enclosure. It is critical to understand that these are non-disconnecting fuses, necessitating the use of a separate disconnect switch for safe operation. The A150C125-20 provides both short circuit and overload protection, specifically designed to prevent capacitor case rupture or dielectric failure within the capacitor unit. Its male stud to L bracket mounting configuration offers manufacturers flexibility in terms of cost and space savings, while providing users with a reliable and equivalent product option. Manufactured in the USA by Mersen, a trusted name in electrical protection, this fuse ensures dependable performance. Key specifications include a 1500VAC rating and a 125A current rating. The visual indicator provides a clear indication of fuse status. SKU: A150C125-20. UNSPSC Code: 39121626.
  • Medium Voltage Capacitor Fuse for capacitor bank protection
  • 1500VAC, 125A current rating
  • ANSI C37-41 standards compliant
  • Male stud to L bracket mounting for installation flexibility
  • Visual indicator for fuse status

Specifications

AC Voltage Rating
1500 V
Amperage Rating
125 A
Application
Protection of capacitors Power Factor Correction Equipment Harmonic Filtering Equipment Induction Heating System High Power Drive Welder
Body Material
GMG
Connection
Male Stud To L Bracket
Connection Material
Tin-Plated Brass
Connection Type
Male Stud To L Bracket
Current Rating
125 A
Interrupt Rating
40 kA
Mounting
Direct Mount
Mounting Type
L Bracket
Mounting Type
L Bracket Mounting
Series
Amp-Trap®
Series
Amp-Trap
Size
6.61 x 1.1;167.894 x 27.94 in;mm
Special Features
High interrupting capacity Current-limiting Blown fuse indicator Direct mounting Clip style mounting Bus mounting Non-venting for silent operation
Standard
ANSI
Type
Capacitor Protection Fuses
Type of Indicators
Visual Indicator
Voltage Rating
1500 VAC
Package Dimensions (L x W x H)
6.61 in x 1.25 in x 3 in
Package Dimensions (L x W x H)
167.894 mm x 31.75 mm x 76.2 mm
Package Weight (Imperial)
1.000 lb
Package Weight (Metric)
0.454 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.
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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.