Mersen E330054 - Square Body High-Speed Fuse Protistor® Size NH 000 aR 690VAC IEC 125A L Brackets
Mersen

E330054

Alternate Item Number: BS000UB69V125


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Overview

The Mersen Protistor® E330054 is a square body high-speed fuse-link (NH 000 size) engineered for semiconductor protection in AC applications up to 690VAC. Rated at 125A with an interrupting rating of 170kA, this aR fuse provides ultra-fast response to protect sensitive semiconductor devices like diodes, thyristors, and IGBTs. The fuse features die-cut elements embedded in solidified sand for controlled arcing, resulting in a lower I²t value (1390 A²s pre-arcing, 8200 A²s clearing) compared to standard fuses. All contact surfaces are silver-plated for superior conductivity, and non-magnetic hardware ensures compatibility with high-frequency applications. The E330054 includes L bracket mounting for easy installation in industrial switchgear. Optional low-voltage trip indicators are available to actuate microswitches for remote signaling. With a power dissipation of 20.8W at rated current, this fuse balances protection and efficiency in power conversion equipment. Certified to IEC standards, it meets the demands of modern semiconductor protection applications.
  • Square body NH 000 size high-speed fuse for semiconductor protection
  • Rated 125A, 690VAC with 170kA interrupting rating
  • Ultra-fast response with I²t values: 1390 A²s (pre-arcing), 8200 A²s (clearing)
  • Silver-plated copper contacts for superior conductivity and non-magnetic hardware for high-frequency compatibility
  • L bracket mounting for easy installation in industrial switchgear

Specifications

AC Voltage Rating
690 V
Amperage Rating
125 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
L Brackets
Mounting
Bolted
Size
3.7 x 1.42 x 0.89 in
Size
94 x 36 x 22.5 mm
Special Features
aR Class according to IEC 60269-4 and VDE 636-23 Very low I²t for improved semiconductor protection Ultra fast acting Superior cycling capability
Standard
IEC 60269-4 Compliance UL/CSA Recognized Component AC: UL Guide No. E76491
Sub Brand
Protistor®
Type
Square Body High-Speed Fuse-Links AC Protection
Voltage Rating
690 V
Wattage
26 W
Package Dimensions (L x W x H)
3.7 in x 1.42 in x 0.89 in
Package Dimensions (L x W x H)
94 mm x 36 mm x 22.5 mm
Package Weight (Imperial)
0.311 lb
Package Weight (Metric)
0.141 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

9F61BWW460

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.