Mersen EAFS253BS0 - Mersen Enclosed Disconnect Switches are designed to meet customer's requirements for compact and durable individual disconnecting means. Both fusible and non-fusible versions are available in a variety of enclosure types. Mersen features NEMA 4X non-metallic enclosures that are extremely durable and provide the ultimate protection for harsh environments and conditions. The enclosed disconnect switch range offers safety, ease of installation, space savings and operational convenience to end-users. 25 amp UL508 NFDS disconnect with black selector handle in a NEMA 1 enclosure.
Mersen

EAFS253BS0

Alternate Item Number: 782001422400

UPC: 782001422400

Contact for Pricing

Overview

The Mersen EAFS253BS0 is a compact, non-fusible enclosed disconnect switch designed for reliable circuit isolation in industrial applications. Manufactured by Mersen, this unit (SKU EAFS253BS0) meets UL508 NFDS standards, ensuring safety and compliance. It features a 25-ampere rating and is housed in a NEMA 1 enclosure, suitable for indoor, non-hazardous locations, offering protection against accidental contact and falling dirt. This switch provides a visible means of disconnecting power for maintenance or emergency shutdown. The black selector handle offers clear ON/OFF indication for operational convenience. Mersen enclosed disconnect switches are known for their safety, ease of installation, and space-saving design, making the EAFS253BS0 ideal for control panels and electrical enclosures where space is limited. Its durable construction ensures consistent performance. Key features include: UL508 NFDS certification, NEMA 1 enclosure for indoor use, 25A rating for medium-duty power control, non-fusible operation for circuits with separate overcurrent protection, and a visible disconnect with an intuitive handle. Applications include manufacturing facilities, automation systems, and HVAC controls. Rated for 600VAC. Mechanical endurance is 20,000 operations.
  • UL508 NFDS certified for industrial control equipment
  • NEMA 1 enclosure for indoor, non-hazardous environments
  • 25 Ampere rating for medium-duty power control
  • Non-fusible operation for circuits with separate overcurrent protection
  • Compact and durable design for space-saving installation

Specifications

Amperage Rating
25 A
Application
Load break switching Separate disconnect means within sight of all motor loads to comply with NEC® Article 430 Circuit isolation Service entrance ratings available Food processing Conveyor systems Harsh industrial environments
Brand Name
Ferraz Shawmut
Enclosure
NEMA 1
Number Of Poles
3
Special Features
Suitable for use as Motor Disconnect Meets OSHA lockout/tagout requirements NEMA rated enclosures Knockouts provided Easy screw mounting Selector or pistol handles in black or red/yellow
Standard
UL 508A UL508 UL98 CSA IEC versions available.
Type
Enclosed Disconnect Switch
Voltage Rating
600 VAC
Package Dimensions (L x W x H)
10.9 IN x 8.4 IN x 6.3 IN
Package Dimensions (L x W x H)
27.686 cm x 21.336 cm x 16.002 cm
Package Weight (Imperial)
10.750 L
Package Weight (Metric)
4.876 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.