Mersen 2633R - Fuse Block 250VAC 250VDC Class R 600A 3-Pole Box In-Line Clip
Mersen

2633R

Alternate Item Number: 2633R

UPC: 782001664794

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Overview

The Mersen 2633R is a 3-pole, Class R fuse block rated for 600A at 250VDC or 600VAC, designed for high-current industrial applications. This in-line clip style block features a phenolic insulator with verified dielectric strength exceeding 2500V, ensuring reliable electrical isolation. The fuse clips are constructed from high-conductivity tin-plated copper and are spring-reinforced for consistent contact pressure, reducing thermal resistance and improving longevity. Key specifications include a wire range of (2) 500kcmil to #4 for stranded or solid copper or aluminum conductors, making it compatible with heavy-duty power distribution systems. The 2633R meets UL 4248 requirements and is UL listed (guide IZLT, File E52283) and CSA certified (class 6225, File 32169). With a Short Circuit Current Rating (SCCR) of 200kA when used with Class R fuses, it provides robust fault protection in demanding environments. Recommended mounting screws are 5/16" (0.313" diameter). This fuse block is suitable for use with Class R fuses such as A2D-R, A2K-R, or TR-R for 250V systems and A6D-R, A6K-R, or TRS-R for 600V systems. Designed for OEM specifications and heat cycling compliance, the 2633R ensures secure wire termination and long-term reliability in industrial power distribution, motor control centers, and other high-current applications.
  • Rated 600A at 250VDC/600VAC with Class R fuse compatibility
  • Phenolic insulator with dielectric strength >2500V
  • Spring-reinforced tin-plated copper clips for reliable contact
  • Wire range: (2) 500kcmil to #4 for Cu/Al stranded or solid conductors
  • UL 4248 compliant, UL listed (IZLT, File E52283), CSA certified (Class 6225)

Specifications

AC Voltage Rating
250 V
Amperage Rating
600 A
Brand Name
Mersen
Class
Class R
Connection
Box In-Line Clip
Connection Type
Box In-Line Clip
Current Rating
600A
DC Voltage Rating
250 V
Material
Phenolic, Tin-plated Copper
Material
Phenolic
Maximum Operating Temperature
80 C
Mounting
Direct Screw Mount
Mounting Type
5/16" (.313" dia.) screws
Number Of Poles
3-pole
Phase
3
Poles
3-pole
Series
Class R
Size
13.12 x 12 x 4.74 in
Size
333.248 x 304.8 x 120.396 mm
Size
2) 500kcmil-#4
Standard
All fuse blocks meet the requirements of UL 4248 UL listed, guide IZLT, File E52283 UL recognized component guide IZLT2, file E52283 CSA certified class 6225, File 32169
Type
UL/CSA Fuse Bases
Voltage Rating
250 VAC
Package Dimensions (L x W x H)
13.12 in x 12 in x 4.74 in
Package Dimensions (L x W x H)
333.248 mm x 304.8 mm x 120.396 mm
Package Weight (Imperial)
26.000 lb
Package Weight (Metric)
11.793 kg
Fuse Block 250VAC 250VDC Class H/K 600A 3-Pole Box In-Line Clip

2633

Fuse Block 250VAC 250VDC Class H/K 600A 3-Pole Box In-Line Clip
POWER DISTRIBUTION BLOCK COVER

LCH133-1

POWER DISTRIBUTION BLOCK COVER
DR4/8 SF DIN2

1SNA110368R1200

DR4/8 SF DIN2

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.