Mersen M1250E03 - Mersen disconnect switches are extremely durable and versatile. These heavy-duty switches are designed with the most up-to-date disconnect switch technology available. Designed to suit the IEC standards, the switch gives you a product that makes and breaks power circuits on load. The best-in-class design allows these switches to have a significantly lower kW rating and smaller footprint than the competition. 1000 Volts 1250 Amps IEC series.
Mersen

M1250E03

Alternate Item Number: 3605340557619

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Specification Sheet

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Overview

The Mersen M1250E03 is a heavy-duty IEC Series disconnect switch engineered for high-performance power circuit management in demanding industrial applications. Designed to meet the latest IEC standards, this switch ensures reliable operation by making and breaking power circuits under load, a critical function for system maintenance, troubleshooting, and operational control. Its advanced design incorporates the most up-to-date disconnect switch technology, delivering superior durability and versatility in harsh operating environments. The M1250E03 features a compact footprint and a significantly lower kW rating than competing switches, optimizing valuable panel space while enhancing energy efficiency. This reduction in size does not compromise performance, as the switch maintains robust electrical handling capabilities. With a rated voltage of 1000 Volts and a current capacity of 1250 Amps, the M1250E03 is built to handle high-power distribution requirements in challenging industrial settings. Ideal for applications in manufacturing plants, data centers, heavy machinery operations, and other high-demand environments, the M1250E03 provides a dependable solution for maintaining the integrity and efficiency of industrial power systems. Its durable construction ensures long-term reliability, even in extreme conditions, making it a trusted choice for critical power management needs. Key specifications include a 1000V voltage rating, 1250A current capacity, full compliance with IEC standards, and the ability to operate on-load for seamless integration into existing power distribution systems.
  • 1000 Volt, 1250 Amp rating for high-power applications
  • Designed to meet IEC standards for reliable performance
  • Safely makes and breaks power circuits under load
  • Compact footprint and lower kW rating for space and energy efficiency
  • Extremely durable construction for harsh industrial environments

Specifications

Amperage Rating
1250 A
Application
Service entrance or main panel disconnect
Brand Name
Ferraz Shawmut
Connection
Blade Type
Mounting
Base Mounted
Number Of Poles
3
Special Features
Mersen disconnect switches are extremely durable and versatile. These heavy-duty switches are designed with the most up-to-date disconnect switch technology available. Designed to suit the UL98 standard, the switch gives you a product that makes and breaks power circuits on load. The switches are tested and approved for use in demanding applications, such as Service Entrance.
Standard
UL98 listed to E191605 IEC 60947-3
Type
UL/CSA Switches
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
14.65 IN x 13.17 IN x 5.18 IN
Package Dimensions (L x W x H)
37.211 cm x 33.4518 cm x 13.1572 cm
Package Weight (Imperial)
39.600 L
Package Weight (Metric)
17.963 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.