Mersen T1013903 - Square Body High-Speed Fuse Protistor® Size 73 aR 1200VAC IEC 1300VAC UL 900A With Striker Flush ends UNC threads
Mersen

T1013903

Alternate Item Number: A130UD73TTI900


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Overview

The Mersen Protistor® T1013903 is a high-speed, square-body fuse-link engineered for ultimate semiconductor protection in power conversion equipment. This aR-rated fuse operates at 1200VAC (IEC) and 1300VAC (UL), with a rated current of 900A. Its robust construction features die-cut elements embedded in solidified sand, ensuring controlled arcing characteristics for a lower I²t and a high interrupting rating of 150 kA. The flush ends with UNC threads facilitate secure mounting. Designed for diodes, thyristors, and IGBT devices, this fuse provides state-of-the-art protection. All contact surfaces are silver-plated, and non-magnetic hardware is utilized. The Protistor® series offers flexibility in equipment design with various body sizes and mounting styles. This specific model, size 73, boasts a pre-arcing I²t of 585 kA²s and a clearing I²t at rated voltage of 3080 kA²s. Power dissipation at rated current is 186W. The fuse can be equipped with an optional low-voltage trip-indicator to operate a field-mountable microswitch, enhancing system monitoring capabilities. Manufacturer: Mersen. SKU: T1013903. UNSPSC Code: 39121628. The fuse is designed with a striker mechanism for enhanced operational feedback. The dimensions of the square body are size 73. The fuse is rated for a breaking capacity of 150 kA at 1200VAC. The operating temperature range is -25°C to +70°C. The fuse is compliant with IEC 60269-4 standards. The striker is designed to activate upon fuse operation. The UNC threads are a standard for secure electrical connections. The flush ends ensure a compact and efficient installation. The aR classification signifies its suitability for protecting power semiconductor devices. The high-speed operation is critical for preventing catastrophic damage to sensitive components. The solidified sand provides excellent arc quenching capabilities. The silver-plated contacts ensure low resistance and reliable current transfer. The non-magnetic hardware prevents unwanted magnetic interference. The Protistor® T1013903 is a reliable solution for demanding power applications.
  • Mersen Protistor® Size 73 aR Fuse-Link
  • Rated Current: 900A
  • Voltage Rating: 1200VAC (IEC) / 1300VAC (UL)
  • High Interrupting Capacity: 150 kA
  • Square Body with UNC Threaded Flush Ends

Specifications

AC Voltage Rating
1300 V
Amperage Rating
900 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 2.87 x 3.09 in
Size
74 x 73 x 78.5 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
150 W
Package Dimensions (L x W x H)
2.91 in x 2.87 in x 3.09 in
Package Dimensions (L x W x H)
74 mm x 73 mm x 78.5 mm
Package Weight (Imperial)
2.756 lb
Package Weight (Metric)
1.250 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 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.