Mersen 24001R - Fuse Block 250VAC 250VDC Class R 400A 1-Pole Box Side-Clip
Mersen

24001R

Alternate Item Number: 24001R

UPC: 782001758646


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Overview

The Mersen 24001R is a single-pole Class R fuse block rated for 400 Amps and 250 Volts AC/DC. Designed for Class R power fuses, this fuse block features a box side-clip connector type, compatible with wire sizes ranging from 1000 to 250 kcmil for both aluminum and copper conductors. Constructed with a durable phenolic insulator, it delivers verified dielectric strength exceeding 2500V, ensuring reliable performance in high-voltage applications. The high-conductivity tin-plated copper fuse clips are spring-reinforced for secure contact, minimizing resistance and heat buildup. This model meets UL 4248 requirements and is UL listed (guide IZLT, File E52283) and CSA certified (class 6225, File 32169). It is part of Mersen’s Class H, K, and R fuse block line, which accommodates 250V and 600V power fuses with various connector types. For 400A and 600A fuse blocks, Mersen recommends 5/16" (.313" dia.) mounting screws. Manufactured in the USA, the 24001R is engineered for industrial electrical protection, offering overcurrent safety in demanding environments.
  • Rated for 400A and 250VAC/DC with spring-reinforced tin-plated copper clips
  • Compatible with 1000-250 kcmil aluminum and copper wire
  • Phenolic insulator with dielectric strength exceeding 2500V
  • UL 4248 listed, UL guide IZLT File E52283, CSA class 6225 File 32169
  • Mounting screws: 5/16" (.313" dia.) recommended for 400A blocks

Specifications

AC Voltage Rating
250 V
Amperage Rating
400 A
Brand Name
Mersen
Class
Class R
Connection
Box Side-Clip
DC Voltage Rating
250 V
Material
Phenolic
Maximum Operating Temperature
80 C
Mounting
Direct Screw Mount
Number Of Poles
1
Phase
1
Size
12 x 4 x 3.75 in
Size
304.8 x 101.6 x 95.25 mm
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)
12 in x 4 in x 3.75 in
Package Dimensions (L x W x H)
304.8 mm x 101.6 mm x 95.25 mm
Package Weight (Imperial)
3.700 lb
Package Weight (Metric)
1.678 kg
Fuse Block 250VAC 250VDC Class H/K 400A 1-Pole Box Side-Clip

24001

Fuse Block 250VAC 250VDC Class H/K 400A 1-Pole Box Side-Clip
POWER DISTRIBUTION BLOCK COVER

LCH133-1

POWER DISTRIBUTION BLOCK COVER
DR4/8 SF DIN2

1SNA110368R1200

DR4/8 SF DIN2

Frequently Asked Questions

What is the voltage rating for the Mersen 24001R fuse block?

The Mersen 24001R fuse block is rated for 250 Volts AC/DC.

What is the maximum amperage for this Mersen Class R fuse block?

This Mersen Class R fuse block has a maximum amperage rating of 400 Amps.

What type of connector does the Mersen 24001R fuse block use?

The Mersen 24001R fuse block features a box side-clip connector type.

What wire range is compatible with the Mersen 24001R fuse block?

The Mersen 24001R fuse block is compatible with a wire range of 1000-250 kcmil for Al/Cu wire.

What is the insulator material used in the Mersen 24001R fuse block?

The Mersen 24001R fuse block is constructed with a durable phenolic insulator.

Is the Mersen 24001R fuse block UL listed and CSA certified?

Yes, the Mersen 24001R fuse block is UL listed (guide IZLT, File E52283) and CSA certified (class 6225, File 32169).

What type of fuses are recommended for the Mersen 24001R fuse block?

The Mersen 24001R fuse block is designed for Class R power fuses.

What size mounting screws are recommended for this 400A fuse block?

Mersen recommends 5/16" (.313" dia.) mounting screws for 400A fuse blocks like the 24001R.

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.