Mersen M800L40 - UL 98 Fusible Switch 600VAC Class L 800A 4-Pole Configuration: 4-0
Mersen

M800L40

Alternate Item Number: M800L40

Contact for Pricing

Overview

The Mersen M800L40 is a robust UL 98 fusible disconnect switch designed for reliable power control in industrial applications. Rated for 600VAC and 800A, this 4-pole switch utilizes Class L fuses, ensuring high-fault current protection with a significant Short-Circuit Current Rating (SCCR) of up to 200kA. Conforming to IEC 60947-3 and bearing the CE mark, it functions as a "service entrance" device capable of full load-break and load-make operations. Engineered for safety and efficiency, the M800L40 features a compact footprint and a modular design allowing flexible handle placement. Fuse doors are interlocked to prevent opening when the switch is energized, and the double-break mechanism isolates both fuse clips from voltage during fuse replacement, enhancing safety. A dedicated "Test" position enables auxiliary contact actuation without main power. Power taps are integrated for energizing CPT or surge devices without separate terminal blocks. This switch is manufactured in Spain and is compatible with a range of Mersen accessories, including terminal lugs (LUG800 recommended for this rating) and terminal shrouds (TSF800-13). The M800L40 is part of Mersen's comprehensive line of low voltage disconnect switches, known for their durability and performance.
  • UL 98 Listed fusible disconnect switch
  • 800A, 600VAC, 4-Pole configuration
  • Class L fuse type with up to 200kA SCCR
  • Double-break contacts for enhanced safety
  • Compact, modular design with interlocked fuse doors

Specifications

AC Voltage Rating
600 V
Amperage Rating
800 A
Application
Main disconnects Short circuit protection Electrical isolation Overcurrent protection Safety switch
Brand Name
Mersen
Connection
Terminal
DC Voltage Rating
250 V
Maximum Operating Temperature
40 C
Minimum Operating Temperature
-5 C
Mounting Type
Direct Screw Mount
Number Of Poles
4
Size
12.05 x 16.97 x 9.17 in
Size
306.07 x 431.038 x 232.918 mm
Special Features
Multiple Configurations Power taps Adjustable shaft depth Fuse monitoring Double break, isolating live and load side of fuse Interlocked fuse doors
Standard
All UL Fusible Disconnect Switches meet UL & CSA requirements UL listed guide WHTY, File E191605 for UL 98 (ratings from 30A to 1200A) IEC 60947-3
Type
UL 98 Fusible
Package Dimensions (L x W x H)
12.05 in x 16.97 in x 9.17 in
Package Dimensions (L x W x H)
306.07 mm x 431.038 mm x 232.918 mm
Package Weight (Imperial)
32.910 lb
Package Weight (Metric)
14.928 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.