Mersen H300732 - Square Body High-Speed Fuse Protistor® 2x73 aR 1250VAC IEC 1000A With Striker Flush ends metric threads
Mersen

H300732

Alternate Item Number: PC273UD13C10CTF


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Overview

The Mersen H300732 Protistor® Square Body High-Speed Fuse (SKU: H300732) delivers ultra-fast semiconductor protection with a 1250VAC rated voltage and 1000A current rating, optimized for high-power applications where rapid fault interruption is critical. Designed for power conversion equipment, this aR-rated fuse-link features flush-end metric threads (M16 x 1.5) for precise installation and an integrated striker for visual or trip-indicator activation, ensuring immediate fault detection. Engineered with die-cut fuse elements embedded in high-purity, solidified silica sand, it effectively controls arcing to achieve lower I²t values and high interrupting ratings up to 150kA, meeting stringent safety standards for industrial environments. All contact surfaces are silver-plated to maximize conductivity and minimize resistance, while non-magnetic stainless-steel hardware ensures stability in high-frequency applications by preventing magnetic interference. The H300732 is specifically compatible with diodes, thyristors, and IGBT devices, making it suitable for advanced power electronics in renewable energy, industrial motor drives, and traction systems. Its design supports global mounting styles, including DIN rail and panel-mount configurations, and can integrate with low-voltage trip indicators via field-mountable microswitches for enhanced system monitoring. With a power dissipation of 174W at rated current, the fuse operates efficiently while maintaining thermal stability. The package weighs 1.16kg and includes a robust square body construction for durability under harsh operating conditions. Ideal for industrial drives, solar inverters, and traction systems, the H300732 provides precise semiconductor protection with high reliability and fast response times, ensuring optimal performance in critical power conversion applications.
  • 1250VAC rated voltage, 1000A current rating for high-power semiconductor protection
  • Ultra-fast aR response with low I²t for precise fault clearing
  • 150kA interrupting rating ensures reliable operation under fault conditions
  • Silver-plated contacts and non-magnetic hardware for high-frequency stability
  • Compatible with trip indicators and multiple global mounting styles

Specifications

AC Voltage Rating
1250 V
Amperage Rating
1000 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
3.58 x 6.57 x 3.09 in
Size
91 x 167 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
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links AC Protection
Type Of Indicators
Striker
Voltage Rating
1250 V
Wattage
231 W
Package Dimensions (L x W x H)
3.58 in x 6.57 in x 3.09 in
Package Dimensions (L x W x H)
91 mm x 167 mm x 78.5 mm
Package Weight (Imperial)
5.578 lb
Package Weight (Metric)
2.530 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.