Mersen W320179 - Square Body High-Speed Fuse Protistor® NH Size 00 aR 690VAC IEC 700VAC UL 315A With Double indicator Plain Blades
Mersen

W320179

Alternate Item Number: NH00UD69V315PV

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Overview

The Mersen W320179 is a high-speed fuse-link from the Protistor® series, specifically designed for semiconductor protection. This NH Size 00 fuse operates at 690VAC (IEC) and 700VAC (UL), with a rated current of 315A. Engineered to provide ultimate protection for sensitive semiconductor devices such as diodes, thyristors, GTO's, and IGBTs, this fuse-link is crucial for power conversion equipment. It features a square body and plain blades for direct installation into NH modular system fuse-holders and fuse switch disconnectors, conforming to DIN 43620/00 standards for global compatibility. The internal construction utilizes pure silver, die-cut elements embedded in solidified sand to manage arcing characteristics, resulting in a low I²t value of 15400 A²s (pre-arcing) and 90700 A²s (clearing at rated voltage). This contributes to a high interrupting rating of 170 kA. The W320179 is equipped with a double indicator for visual status indication and can be fitted with a low voltage trip-indicator to operate a field-mountable microswitch, enhancing system monitoring and safety. All contact surfaces are silver-plated, and hardware is non-magnetic to ensure reliable performance and longevity. With a power dissipation of 60W at rated current, this fuse-link offers efficient operation. Its robust design and precise protection capabilities make it an essential component in industrial electrical systems requiring reliable semiconductor safeguarding. SKU: W320179. Manufacturer: Mersen. UNSPSC Code: 39121628. Country of Origin: US.
  • Mersen Protistor® NH Size 00 aR fuse-link
  • Rated 315A, 690VAC (IEC) / 700VAC (UL)
  • Designed for semiconductor protection (diodes, thyristors, IGBTs)
  • Features double indicator and plain blades
  • High interrupting rating of 170 kA with low I²t values

Specifications

AC Voltage Rating
700 V
Amperage Rating
315 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
315A
Material
Silver, Sand
Mounting
Clip
Mounting Type
DIN 43620/00, NH modular system
Series
Protistor® NH
Size
3.09 x 1.18 x 2.36 in
Size
78.5 x 30 x 60 mm
Size
Size 00
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
60 W
Package Dimensions (L x W x H)
3.09 in x 1.18 in x 2.36 in
Package Dimensions (L x W x H)
78.5 mm x 30 mm x 60 mm
Package Weight (Imperial)
0.441 lb
Package Weight (Metric)
0.200 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.