Mersen T301041 - Square Body High-Speed Fuse Protistor® Size 72 aR 1250VAC IEC 1300VAC UL 500A With Striker Flush ends UNC threads
Mersen

T301041

Alternate Item Number: A130UD72TTI500


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Overview

The Mersen T301041 Protistor® Size 72 aR fuse-link delivers ultra-fast semiconductor protection for high-voltage power conversion equipment, specifically designed to safeguard sensitive semiconductor devices in demanding industrial environments. Rated at 500A and 1250VAC/1300VAC, this square-body fuse-link is engineered for high-performance applications in industrial drives, renewable energy systems, and traction equipment, where rapid fault interruption is critical to prevent catastrophic damage. The Protistor® series features precision die-cut fuse elements embedded in high-purity, solidified sand, which optimizes arc control and minimizes I²t values, ensuring superior interrupting ratings for enhanced safety and reliability. All contact surfaces are silver-plated to maintain superior conductivity and reduce contact resistance over time, while non-magnetic hardware ensures long-term reliability in high-frequency environments where magnetic interference could compromise performance. The T301041 includes an integrated striker mechanism, which activates a trip indicator for remote fault signaling via a microswitch, allowing for immediate system response to overcurrent conditions without manual inspection. Designed with flush-end UNC threads, this fuse-link supports multiple worldwide mounting styles, providing flexibility in equipment design and simplifying integration into existing systems. Compliance with IEC 1300VAC and UL 500A standards ensures global acceptance and adherence to stringent safety and performance requirements, making it suitable for use in a wide range of high-power applications. The Protistor® series is particularly well-suited for protecting diodes, thyristors, and IGBT devices in high-power conversion systems, where precision, speed, and reliability are essential to maintain operational integrity. With its robust construction and advanced arc management, the T301041 delivers consistent performance in the most demanding electrical environments.
  • Ultra-fast aR fuse-link for semiconductor protection (diodes, thyristors, IGBTs)
  • Rated 500A at 1250VAC/1300VAC with IEC 1300VAC and UL 500A compliance
  • Square body design with flush-end UNC threads for versatile mounting
  • Silver-plated contacts and non-magnetic hardware for high-frequency reliability
  • Striker-equipped for trip-indicator activation and remote fault signaling

Specifications

AC Voltage Rating
1300 V
Amperage Rating
500 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
End Contact with Threaded Holes
Mounting
Bolted
Size
2.91 x 2.32 x 2.48 in
Size
74 x 59 x 63 mm
Special Features
Multiple body sizes and terminals or blades combination aR Class according to IEC 60269-4 and VDE 636-23 Very low I²t for improved semiconductor protection Ultra fast acting Current limiting Superior cycling capability
Standard
IEC 60269-4 Compliance UL/CSA Recognized E76491 CCC GB 13539.4 for Asian market only
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links AC Protection
Type Of Indicators
Striker
Voltage Rating
1300 V
Wattage
94 W
Package Dimensions (L x W x H)
2.91 in x 2.32 in x 2.48 in
Package Dimensions (L x W x H)
74 mm x 59 mm x 63 mm
Package Weight (Imperial)
1.874 lb
Package Weight (Metric)
0.850 kg
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9F61 Size B Clips 1.6in

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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.

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.