Eaton EBMX3B-W400 Explosionproof Breaker - NEC/CEC
Part Number: EBMX3B-W400
Quick Summary
EBMX3B-W400 is an explosionproof circuit breaker for protecting three-phase feeders in hazardous locations. In challenging plants, inconsistent protection and difficult maintenance slow projects. It carries NEC/CEC compliance, Class I Division 1 Zone 1 ratings, and rugged NEMA 3R 4X construction to withstand harsh hazardous settings. Together with a 600 Vac rating and 400 AIC interrupt rating, this unit delivers reliable protection for large loads while helping you meet safety and compliance goals. Designed for easy installation and service, the EBMX3B-W400 supports copper-free aluminum enclosures and a clamped cover for quick maintenance in harsh environments. Facilities managers benefit from documented parts lists, installation instructions, and 3D design resources that accelerate commissioning.
Product Information
Extended Description
EBMX3B-W400 Eaton: Eaton Crouse-Hinds series clamped EBMXB circuit breaker, Copper-free aluminum, Size 3 enclosure, 400A, Eaton breaker, Three-pole, 600 Vac
Product Name
Eaton Crouse-Hinds series clamped EBMXB circuit breaker
Catalog Number
EBMX3B-W400
UPC
662276605954
Product Length/Depth
42.28 in
Product Height
13.85 in
Product Width
17.93 in
Product Weight
211 lb
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Zone 1 Class I, Division 2 Class I, Zone 2 Class II, Division 1 Class II, Division 2 Class III
NEMA Rating
3R 4X 7 9
Enclosure cover construction
Clamped
Enclosure size
Size 3
Enclosure
With circuit breaker
Manufacturer
Eaton
Voltage rating
600 Vac
Interrupt rating
400 AIC
Number of poles
Three-pole
Enclosure material
Copper-free aluminum
SP3D Design Package - Clamped EBMXB Explosionproof Circuit Breakers
EBMX Replacement Parts List
EBMX Replacement Parts List
Clamped EBMXB Series Explosionproof Circuit Breakers catalog page
Clamped EBMXB Explosionproof Circuit Breakers Canadian certification
Clamped EBMXB Explosionproof Circuit Breakers Canadian certification
IF 1794 - Clamped EBMX Motor Control Series
IF 1794 - Clamped EBMX Motor Control Series
IF 1794 - Clamped EBMX Motor Control Series
Eaton Specification Sheet - EBMX3B-W400
Feature: Clamped enclosure cover. Business Impact: The clamped design delivers a durable, explosionproof seal that stands up to dust, moisture, and corrosive atmospheres in hazardous locations, while simplifying field maintenance. Application: Ideal for EBMXB installations in Class I Division 1 and Zone 1 environments where downtime is costly and safety is paramount. Feature: Copper-free aluminum enclosure. Business Impact: Copper-free construction delivers corrosion resistance and robust mechanical strength without the weight and lead times associated with copper components, reducing lifecycle costs. Application: Outdoor, chemical plant, and refinery installations where exposure to moisture and chemicals is routine. Feature: 600 Vac rating with 400 AIC interrupt rating. Business Impact: Enables reliable isolation of large three-phase circuits and improves fault clearance performance, enhancing personnel safety and equipment protection. Application: Large motors, pumps, and processing lines in hazardous industrial facilities. Feature: Three-pole design in Size 3 enclosure. Business Impact: Provides compact, factory-aligned 3-phase protection for space-constrained panels, while maintaining serviceability. Application: Main distribution panels and feeder assemblies in hazardous locations where three-phase loads dominate. Feature: NEC/CEC compliance, Class I, II, III hazardous ratings and NEMA 3R 4X ratings. Business Impact: Aligns with global electrical codes and industry standards, reducing compliance risk and simplifying procurement for regulated projects. Application: Any installation requiring formal hazardous-location certification and rugged external enclosure. Feature: Documentation and digital assets. Business Impact: Access to SP3D models, brochures, replacement parts lists, installation sheets, and a detailed specification sheet accelerates design, ordering, and maintenance cycles. Application: Engineering design, procurement, and service teams aiming to shorten project lead times.
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FAQs
The EBMX3B-W400 is designed for Class I Division 1 Zone 1 and other hazardous environments. It uses a copper-free aluminum enclosure with a clamped cover, enabling quick service and safe disconnection of large three-phase feeders in plants such as refineries, chemical facilities, and mining operations.
It is certified to NEC/CEC standards and features Class I ratings for hazardous locations (Division 1 and Zone 1, as well as Division 2/Zone 2), along with compatible NEMA ratings. This ensures regulatory compliance during design, installation, and ongoing maintenance.
Yes. The unit is a three-pole breaker rated for 600 Vac with a 400 AIC interrupt rating, suitable for protecting large three-phase loads such as motors, pumps, and process equipment in hazardous facilities.
Eaton provides SP3D design packages, installation instructions, replacement parts lists, and the official specification sheet. Access to catalogs and certification reports also helps with project documentation and commissioning.
The clamped enclosure and copper-free aluminum construction reduce corrosion risk and simplify field servicing. Availability of parts lists and instruction sheets supports proactive maintenance, lowers downtime, and extends service life in harsh environments.