Mersen A430C20-75 - Medium Voltage Capacitor Fuse 4300VAC 20A Female Stud To Female Tube Visual Indicator Amp-Trap®
Mersen

A430C20-75

Alternate Item Number: A430C20-75

UPC: 782001354893


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Overview

The Mersen A430C20-75 Amp-Trap® medium voltage capacitor fuse (SKU: A430C20-75) provides essential short-circuit and overload protection for medium voltage capacitor banks. Engineered to meet ANSI C37-41 compliance, this fuse is rated for 4300VAC and 20A, ensuring reliable operation in critical power systems. Its design features a female stud to female tube mounting configuration and includes a visual indicator for immediate blown-fuse detection. The A430C20-75 operates silently without noise or discharge, making it suitable for indoor general-purpose enclosures and outdoor weatherproof applications. With a high interrupting rating of 65 kA Sym at 4300V RMS, it effectively isolates faulty capacitors, preventing case rupture or dielectric failure. Key specifications include a melting I²t of 4.5 kA²s and a maximum clearing I²t of 22.1 kA²s. The fuse has a body diameter of 2.00 inches (50.8 mm) and an overall length of 9.75 inches (247.7 mm), with a tube length of 7.12 inches (180.8 mm). Its compact design supports direct, clip-style, and bus mounting, offering cost-effective and space-saving solutions for manufacturers of power correction and harmonic filtering equipment. Manufactured in the US.
  • Mersen Amp-Trap® Medium Voltage Capacitor Fuse
  • Rated 4300VAC, 20A
  • 65 kA Sym Maximum 1 Phase Interrupting Rating at 4300V RMS
  • Visual Indicator for blown-fuse detection
  • ANSI C37-41 Compliant

Specifications

AC Voltage Rating
4300 V
Amperage Rating
20 A
Application
Capacitor Protection Power Factor Correction Equipment Harmonic Filtering Equipment Induction Heating System High Power Drive Welders
Body Material
GMG
Brand Name
Mersen
Connection
Female Stud To Female Tube
Connection Material
Tin-Plated Brass
Connection Type
Female Stud To Female Tube
Current Rating
20 A
Interrupt Rating
65 kA
Mounting
Direct Mount
Mounting Type
Direct, clip-style, bus mounting
Series
A430C
Size
9.75 x 2;247.65 x 50.8 in;mm
Special Features
High interrupting capacity Current limitation Blown-fuse indication Direct mount Clip style mount Bus mount Non-venting for silent operation
Standard
ANSI C37-41
Standard
ANSI
Sub Brand
Amp-Trap®
Type
Capacitor Protection Fuses
Type Of Indicators
Visual Indicator
Voltage Rating
4300 VAC
Package Dimensions (L x W x H)
9.75 in x 2 in x 2 in
Package Dimensions (L x W x H)
247.65 mm x 50.8 mm x 50.8 mm
Package Weight (Imperial)
2.500 lb
Package Weight (Metric)
1.134 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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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.

Frequently Asked Questions

What is the maximum interrupting rating for the Mersen A430C20-75 fuse?

The Mersen A430C20-75 fuse has a maximum 1 phase interrupting rating of 65 kA at 4300V RMS Sym.

What is the melting I²t value for this capacitor fuse?

The melting I²t for the Mersen A430C20-75 fuse is 4.5 kA²s.

What is the maximum clearing I²t for the A430C20-75 fuse?

The maximum clearing I²t for the Mersen A430C20-75 fuse is 22.1 kA²s.

What are the physical dimensions of the Mersen A430C20-75 fuse?

The Mersen A430C20-75 fuse has a body diameter of 2.00 inches (50.8 mm), an overall length of 9.75 inches (247.7 mm), and a tube length of 7.12 inches (180.8 mm).

Does the A430C20-75 fuse have a visual indicator?

Yes, the Mersen A430C20-75 fuse features a visual indicator for blown-fuse detection.

What voltage is the Mersen A430C20-75 fuse rated for?

The Mersen A430C20-75 fuse is rated for 4300VAC.

Is the Mersen A430C20-75 fuse compliant with ANSI standards?

Yes, the Mersen A430C20-75 fuse is designed for ANSI C37-41 compliance.

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.