Mersen V300628 - Square Body High-Speed Fuse Protistor® Size 73 aR 1250VAC IEC 1300VAC UL 315A With Striker Open Slot Blades
Mersen

V300628

Alternate Item Number: PC73UD13C315EF


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Overview

The Mersen V300628 Protistor® fuse-link is a high-performance, ultra-fast acting aR fuse designed for maximum protection in power conversion equipment. Rated at 315A with a voltage rating of 1250VAC according to IEC standards and 1300VAC according to UL standards, this Size 73 square body fuse-link is engineered for semiconductor protection in diodes, thyristors, and IGBT devices. The fuse-link features die-cut elements embedded in solidified sand to control arcing, resulting in a lower I²t and high interrupting rating. All contact surfaces are silver-plated for optimal conductivity, and non-magnetic hardware ensures stability in sensitive applications. The V300628 is available with a low-voltage trip indicator that can operate a field-mountable microswitch for remote monitoring. Designed for global compatibility, this fuse-link offers multiple mounting styles and is suitable for use in high-power industrial, renewable energy, and traction applications where precise fault protection is critical. The open slot blade connection type ensures secure and reliable electrical contact in demanding environments. The square body design of the V300628 facilitates efficient heat dissipation and robust mechanical integrity, further contributing to its reliability in demanding applications. Its aR classification signifies its specialized application for protecting power semiconductor devices against short-circuit currents. The striker mechanism integrated into the fuse-link provides a clear visual indication of operation, enhancing system diagnostics and maintenance procedures. The specific dimensions associated with Size 73 ensure compatibility with a wide range of fuse holders and power distribution systems designed for this form factor. The combination of its fast-acting characteristics, high interrupting capacity, and robust construction makes the V300628 an essential component for ensuring the safety and operational continuity of critical power systems.
  • 315A current rating with 1250/1300VAC voltage rating
  • Ultra-fast acting aR fuse for semiconductor protection (diodes, thyristors, IGBTs)
  • Square body Size 73 with open slot blade connections
  • Silver-plated contacts and non-magnetic hardware for stability
  • Optional low-voltage trip indicator for remote monitoring

Specifications

AC Voltage Rating
1300 V
Amperage Rating
315 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
Open Slot Blades
Mounting
Bolted
Size
5.88 x 2.87 x 3.09 in
Size
149.4 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
84 W
Package Dimensions (L x W x H)
5.88 in x 2.87 in x 3.09 in
Package Dimensions (L x W x H)
149.4 mm x 73 mm x 78.5 mm
Package Weight (Imperial)
2.447 lb
Package Weight (Metric)
1.110 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 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.