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Mersen A720T3E-1 - Medium Voltage Potential Transformer Fuse 7200VAC 3A Ferrule Amp-Trap®
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Mersen A720T3E-1 Medium Voltage Potential Transformer Fuse 7200VAC 3A Ferrule Amp-Trap®

Alternate Item Number: A720T3E-1

UPC: 782001800468


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Overview

The Mersen A720T3E-1 is a medium voltage Potential Transformer (PT) fuse, specifically engineered for the primary winding protection of PTs and control power transformers. This Amp-Trap® series fuse operates at a rated voltage of 7.2kVAC and features a precise 3A current rating. It offers a substantial interrupting rating (IR) of 50kA RMS symmetrical, ensuring robust protection against overcurrents and short circuits. The A720T3E-1 utilizes a compact ferrule mounting design, facilitating compatibility with standard fuse clips and interchangeability with other fuse brands. As a current-limiting fuse, it provides superior equipment protection by rapidly reducing fault current. Its construction ensures silent operation without venting. The fuse is identified by a durable metal-embossed catalog number and manufacturing date for lasting traceability. Key specifications include: Voltage: 7.2kVAC, Amp Rating: 3A, Interrupting Rating: 50kA Sym. Physical dimensions are 0.812 inches (20.6 mm) in diameter and 9.5 inches (241 mm) in length, with a 0.625 inch (15.9 mm) ferrule length. The required clip centers for installation are 8.88" (227 mm). SKU: A720T3E-1. UNSPSC Code: 39121626.
  • Medium Voltage Potential Transformer (PT) Fuse
  • Rated for 7.2kVAC and 3A
  • 50kA RMS symmetrical interrupting rating
  • Compact ferrule mounting design
  • 8.88" (227 mm) clip centers

Specifications

AC Voltage Rating
7200 V
Amperage Rating
3 A
Application
Primary protection for potential transformers (PT) or control power transformers (CPT)
Body Material
GMG
Brand Name
Mersen
Connection
Ferrule
Connection Material
Tin-Plated Copper
Connection Type
Ferrule
Current Rating
3 A
Interrupt Rating
50 kA
Material
Metal/Composite
Mounting
Clip
Mounting Type
Ferrule
Mounting Type
Standard clips
Series
Amp-Trap®
Series
Amp-Trap® PT
Size
9.5 x 0.81 in
Size
241.3 x 20.625 mm
Size
Small dimension ferrule type
Size
0.812 inches (20.6 mm) diameter, 9.5 inches (241 mm) length
Special Features
Ferrule mounting for standard clips and interchangeability with other brands of fuses Current-limiting for superior equipment protection Non-venting for silent operation Metal embossed catalog number and manufacturing date for lasting identification Blown-fuse indicator to give positive identification of open fuse fuse is available on the 9F60 series
Sub Brand
Amp-Trap®
Type
Potential Transformer Protection Fuses
Voltage Rating
7200 VAC
Package Dimensions (L x W x H)
9.5 in x 0.81 in x 0.81 in
Package Dimensions (L x W x H)
241.3 mm x 20.625 mm x 20.625 mm
Package Weight (Imperial)
0.500 lb
Package Weight (Metric)
0.227 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

What is the voltage rating of the Mersen A720T3E-1 fuse?

The Mersen A720T3E-1 fuse is rated for 7.2kVAC.

What is the amp rating for this Mersen PT fuse?

The Mersen A720T3E-1 fuse has an amp rating of 3A.

What is the interrupting rating of the A720T3E-1 fuse?

The A720T3E-1 fuse has a maximum interrupting rating of 50kA RMS symmetrical.

What is the required clip center distance for this fuse?

The Mersen A720T3E-1 fuse requires clip centers of 8.88 inches (227 mm).

What type of mounting does the A720T3E-1 fuse use?

The A720T3E-1 fuse features a compact ferrule mounting design.

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.