Mersen R330134 - Square Body High-Speed Fuse Protistor® Size NH 000 aR 690VAC IEC 250A With Striker L Brackets
Mersen

R330134

Alternate Item Number: BS000UB69V250P


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Specification Sheet

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Overview

The Mersen R330134 Protistor® Square Body High-Speed Fuse-link is a size NH 000 aR fuse rated for 690VAC and 250A, designed for ultra-fast protection of sensitive semiconductor devices such as diodes, thyristors, and IGBTs in small power conversion equipment. Its high-speed performance is achieved through die-cut elements embedded in high-purity, solidified sand, which optimizes arcing characteristics to deliver a lower I²t value and a high interrupting rating. The fuse features silver-plated contact surfaces for superior electrical conductivity and non-magnetic hardware to prevent magnetic interference with adjacent components. The R330134 includes L brackets for secure mounting and supports a low-voltage trip-indicator, enabling field-mountable microswitch activation for enhanced operational monitoring and safety. Manufactured in the United States to IEC standards, this fuse-link (UNSPSC 39121628) provides precise protection and flexibility in equipment construction, ensuring reliable performance in demanding applications. The square body design enhances mechanical stability and heat dissipation, while the aR classification confirms its suitability for semiconductor protection in AC circuits up to 690V.
  • Size NH 000 aR fuse rated 690VAC, 250A
  • Ultra-fast protection for semiconductors (diodes, thyristors, IGBTs)
  • Die-cut elements in sand for optimized arcing and lower I²t
  • Silver-plated contacts and non-magnetic hardware
  • Includes striker L brackets and supports low-voltage trip-indicator

Specifications

AC Voltage Rating
690 V
Amperage Rating
250 A
Application
Protection of inverters, motor drives, UPS systems and similar 690V or less equipments.
Brand Name
Mersen
Case
Ceramic
Connection
L Brackets
Current Rating
250 A
Material
Silver-plated, Non-magnetic hardware, Solidified sand
Material
Silver-plated contact surfaces, non-magnetic hardware, die-cut elements embedded in solidified sand
Material
Silver-plated contact surfaces, non-magnetic hardware, die-cut elements in solidified sand
Material
Silver-plated, non-magnetic hardware
Mounting
Bolted
Mounting Type
L Brackets
Mounting Type
Striker L Brackets
Series
Protistor®
Size
3.7 x 1.26 x 1.06 in
Size
94 x 32 x 27 mm
Size
NH 000
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
Type Of Indicators
Striker
Voltage Rating
690 V
Wattage
45 W
Package Dimensions (L x W x H)
3.7 in x 1.26 in x 1.06 in
Package Dimensions (L x W x H)
94 mm x 32 mm x 27 mm
Package Weight (Imperial)
0.343 lb
Package Weight (Metric)
0.156 kg
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Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20

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Fuse Holder UltraSafe™ 800VAC 1000VDC UL Fuse size 14x51 1-Pole Visual Indicator Microswitch Pressure Plate IP20
Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8

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Fuse Block 1500VAC 1500VDC 400A 1-Pole Stud M8
Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20

E1062696

Fuse Holder Modulostar® Size 10x38 IEC 690VAC 690VDC 3-Pole IP20
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.