Mersen M320263 - Square Body High-Speed Fuse Protistor® NH Size 0 aR 690VAC IEC 700VAC UL 100A With Double indicator Plain Blades
Mersen

M320263

Alternate Item Number: NH0UD69V100PV

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Overview

The Mersen Protistor® M320263 is a high-speed fuse-link designed for advanced semiconductor protection. Engineered to meet IEC 690VAC and UL 700VAC standards, this NH Size 0 fuse offers a robust 100A current rating. It is specifically designed for protecting sensitive semiconductor devices such as diodes, thyristors, GTO's, and IGBTs within power conversion equipment. The fuse-links adhere to DIN 43620/00 standards, ensuring compatibility with NH modular system fuse-holders and fuse switch disconnectors for direct installation. Constructed with pure silver, die-cut elements embedded in solidified sand, the M320263 provides superior arcing control, resulting in a lower I²t and a high interrupting rating of 200 kA. This design contributes to enhanced equipment reliability and safety. All contact surfaces are silver-plated, and non-magnetic hardware is utilized to prevent unwanted magnetic interference. Furthermore, the M320263 features a double indicator, which can be equipped with a low-voltage trip-indicator to operate a field-mountable microswitch, providing clear visual indication of fuse status and enabling remote monitoring capabilities. With a power dissipation of 25W at its rated current, this fuse-link balances effective protection with manageable thermal performance. Its compact design and plain blade terminals facilitate straightforward integration into existing NH fuse systems. The M320263 is manufactured in the US, ensuring adherence to stringent quality control standards.
  • High-speed fuse-link for semiconductor protection (diodes, thyristors, IGBTs)
  • NH Size 0, 100A, 690VAC (IEC) / 700VAC (UL) rated
  • 200 kA interrupting capacity for robust fault protection
  • Features double indicator for status monitoring
  • Constructed with pure silver elements and sand filling for controlled arcing

Specifications

AC Voltage Rating
700 V
Amperage Rating
100 A
Application
Protection of inverters, UPS systems, motor drives and similar 700V or less equipment.
Brand Name
Mersen
Case
Ceramic
Connection
Plain Blades
Mounting
Clip
Size
4.92 x 1.18 x 2.4 in
Size
125 x 30 x 61 mm
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
700 V
Wattage
30.5 W
Package Dimensions (L x W x H)
4.92 in x 1.18 in x 2.4 in
Package Dimensions (L x W x H)
125 mm x 30 mm x 61 mm
Package Weight (Imperial)
0.595 lb
Package Weight (Metric)
0.270 kg
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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.