Mersen R612 - Fuse Reducer 600V Class R 100 - 600
Mersen

R612

Alternate Item Number: R612

UPC: 782001752453

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Overview

The Mersen R612 (SKU R612) is a rejection-type fuse reducer designed to enable the installation of lower-rated fuses within existing fuse clips rated for higher ampere values. Specifically engineered for 600V Class R applications, this reducer allows a 100A fuse to be safely installed in a 600A fuse clip. This capability is crucial for optimizing circuit protection by allowing fuses to be sized closer to the actual load requirements, thereby reducing nuisance tripping and enhancing equipment longevity. The R612 is vital for retrofitting older electrical systems without costly upgrades to fuse blocks. Its rejection-type design ensures that only Class R fuses can be inserted, preventing misapplication and maintaining compliance with safety standards. Commonly used in motor control centers, panelboards, and switchgear across manufacturing, data centers, and commercial buildings, the R612 facilitates precise fuse sizing for applications like motor protection. Tested to 200,000A IR, it meets UL Listed Guide No IZZR and CSA Certified standards. Mersen, a leader in electrical protection, provides reliable solutions for industrial power systems.
  • Allows 100A fuse to fit 600A clips
  • For 600V Class R applications
  • Rejection-type design prevents misapplication
  • Enhances circuit protection by closer fuse sizing
  • UL Listed Guide No IZZR, CSA Certified

Specifications

AC Voltage Rating
600 V
Application
Start-up or newly expanding manufacturing facilities ramping up production and electrical demand Temporary use of reduced rating fuse
Brand Name
Ferraz Shawmut
Class
R
Family Code
174
Family Description
Fuse Reducers
Size
x 3 Inches
Size
3 x x 2 in
Special Features
Allow a reduced rating fuse to be installed in a larger fuse holder of the same fuse class Wide range of ratings and sizes
Standard
250V and 600V Class H, K, and R - UL Listed Guide No. IZZR, CSA Certified. 600V Class J - UL Listed Guide No. IZZR, CSA Certified 30-600A
Standard
UL Listed Guide No. IZZR CSA Certified
Type
Fuse Reducer
Type
Fuse Reducers
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
3.06 IN x 2 IN x 0.187 IN
Package Dimensions (L x W x H)
7.7724 cm x 5.08 cm x 4.7498 mm
Package Weight (Imperial)
0.900 L
Package Weight (Metric)
0.408 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.