Mersen H320075 - Square Body High-Speed Fuse Protistor® NH Size 000 aR 690VAC IEC 700VAC UL 250A With Double indicator Plain Blades
Mersen

H320075

Alternate Item Number: NH000UD69V250PV

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Overview

The Mersen H320075 is a high-speed fuse-link from the Protistor® NH Size 000 series, engineered for superior semiconductor protection. Rated for 250A, this fuse-link operates at 690VAC (IEC) and 700VAC (UL), providing robust safety for power conversion equipment. Its aR classification signifies its suitability for protecting diodes, thyristors, GTO's, and IGBT devices with fast-acting response. Constructed with pure silver, die-cut elements embedded in solidified sand, it ensures controlled arcing characteristics, resulting in a low I²t value of 42500 A²s and a high interrupting rating of 200 kA. The double indicator feature provides clear visual confirmation of fuse status. All contact surfaces are silver-plated, and hardware is non-magnetic to prevent interference. This NH style fuse-link conforms to DIN 43620/00 standards, ensuring worldwide acceptance in NH modular system fuse-holders and fuse switch disconnectors for direct installation. The power dissipation at rated current is 50 W, and it weighs 0.24 kg. This fuse-link can be equipped with a low voltage trip-indicator that can operate a field-mountable microswitch, offering enhanced system monitoring capabilities. The Mersen H320075 is manufactured in the US.
  • Mersen Protistor® NH Size 000 aR Fuse-Link
  • Rated for 250A, 690VAC (IEC) / 700VAC (UL)
  • 200 kA interrupting capacity for high fault current protection
  • Double indicator for clear status indication
  • Designed for semiconductor protection (diodes, thyristors, IGBTs)

Specifications

AC Voltage Rating
700 V
Amperage Rating
250 A
Application
Protection of inverters, UPS systems, motor drives and similar 700V or less equipment.
Brand Name
Mersen
Case
Ceramic
Connection
Plain Blades
Connection Type
Plain Blades
Current Rating
250A
Material
Silver, Sand
Mounting
Clip
Mounting Type
NH modular system
Series
Protistor® NH
Size
3.09 x 0.83 x 2.07 in
Size
78.5 x 21 x 52.5 mm
Size
Size 000
Special Features
Multiple body sizes aR Class according to VDE 636-23 and IEC 60269-4 Very low I²t for improved semiconductor protection Ultra fast acting Current limiting Superior cycling capability Indication system with double indicator
Standard
UL/CSA Recognized Component IEC 60269-4 Compliance
Sub Brand
Protistor®
Type
NH square Body High-Speed Fuse-Links AC Protection
Type Of Indicators
Double indicator
Voltage Rating
690VAC/700VAC
Voltage Rating
700 V
Wattage
44.1 W
Package Dimensions (L x W x H)
3.09 in x 0.83 in x 2.07 in
Package Dimensions (L x W x H)
78.5 mm x 21 mm x 52.5 mm
Package Weight (Imperial)
0.287 lb
Package Weight (Metric)
0.130 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.