Mersen A4BY2001-TI - Fuse A4BY - Class L - Time-Delay 600VAC 300VDC 2001A Blade TI Indicator Amp-Trap®
Mersen

A4BY2001-TI

Alternate Item Number: A4BY2001-TI

UPC: 782001930004


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Overview

The Mersen Amp-Trap A4BY2001-TI is a Class L fuse designed for critical protection applications. With a robust 2001A current rating and dual voltage capabilities of 600VAC and 300VDC, this fuse is engineered for reliability. Its blade connection type ensures secure integration into service entrance equipment, feeder circuits, and circuit breaker protection systems. The A4BY series is a 100% rated device, allowing continuous operation at its full ampere rating. A key feature is its time-delay characteristic, providing a minimum 4-second delay at 500% of its rating. This delay is crucial for allowing normal current surges to pass without tripping, while still offering effective protection against sustained overcurrents. This design also facilitates coordination with ground fault relays, enhancing overall system safety and operational efficiency. The integrated TI (Time Indicator) provides a visual indication of fuse operation. Manufactured in the US, the A4BY2001-TI (SKU: A4BY2001-TI) offers dependable performance for demanding industrial environments.
  • Class L, 2001A, 600VAC/300VDC rating
  • 100% rated device for continuous operation
  • Time-delay with 4-second minimum at 500% rating
  • TI (Time Indicator) for visual operation status
  • Ideal for service entrance, feeder circuits, and breaker protection

Specifications

AC Voltage Rating
600 V
Amperage Rating
2001 A
Application
Mains Feeders Circuit Breakers Load centers Panelboards Switchboards Metering Centers
Body Material
GMG
Brand Name
Mersen
Class
Class L
Connection
Blade
Connection Material
Silver-Plated Copper
DC Voltage Rating
300 V
Fuse Class
L
Interrupt Rating
200 kA
Mounting
Bolted
Size
10.75 x 4.5 in
Size
273.05 x 114.3 mm
Special Features
Unique dimensions prevent replacement by other fuse classes Blade-stamped catalog numbers for permanent identification Glass melamine body and plated terminals provide superior reliability in harsh environments
Standard
Mersen Self-Certification, UL Listed to Standard 248-10, File E2137 CSA Certified to Standard C22.2, No. 248.10 IEC 269-2-1 DC Tested to UL 248 limits (Mersen Self-Certified)
Sub Brand
Amp-Trap®
Type
Class L
Type Of Indicators
TI Indicator
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
10.75 in x 4.5 in x 4.5 in
Package Dimensions (L x W x H)
273.05 mm x 114.3 mm x 114.3 mm
Package Weight (Imperial)
15.300 lb
Package Weight (Metric)
6.940 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.