Eaton EBMBA WT40EHD34 Explosionproof Circuit Breaker EHD
Part Number: EBMBA WT40EHD34
Quick Summary
Eaton Crouse-Hinds EBMB circuit breaker protects electrical systems in hazardous locations while delivering reliable three-phase overcurrent protection. For engineers facing downtime, costly rework, or difficult compliance, this unit offers a rugged, gasketed enclosure and straightforward field installation. Certified for Hazardous/Classified Locations, NEC/CEC compliance, and UL explosionproof certification, it supports safe operation across diverse industries. With a 100A frame and a wide 15–70 A amperage range, it scales protection while reducing spare-part variety. Designed for integration within Eaton Crouse-Hinds EBMB families, it enables faster procurement and consistent maintenance across panels and field installs.
Product Information
Extended Description
EBMBA WT40EHD34 Eaton: Eaton Crouse-Hinds series EBMB circuit breaker, 15A through 70A, EHD frame type, Bolted/ground joint/gasketed cover construction, Copper-free aluminum, 100A frame size, Cutler-Hammer breaker, Three-pole, 40A trip, 480 Vac/250 Vdc
Product Name
Eaton Crouse-Hinds series EBMB circuit breaker
Catalog Number
EBMBA WT40EHD34
UPC
782274920351
Product Length/Depth
14.78 in
Product Height
19.4 in
Product Width
10.25 in
Product Weight
89 lb
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 1 Class II, Division 2 Class III
NEMA Rating
3 3R 4 7 9 12
Enclosure
With circuit breaker
Number of poles
Three-pole
Voltage rating
480 Vac/250 Vdc
Frame size
100A
Amperage Rating
15 A through 70 A
Manufacturer
Cutler-Hammer
Circuit breaker frame type
EHD
Enclosure cover construction
Bolted/ground joint/gasketed
Enclosure material
Copper-free aluminum
SP3D Design Package - EBMB Explosionproof Circuit Breakers
EBMB Series Explosionproof Circuit Breakers catalog page
EBMB Explosionproof Circuit Breakers UL certification
EBMB Explosionproof Circuit Breakers UL certification
IF 1616 - Flange Gasket Replacement Kit
IF 1616 - Flange Gasket Replacement Kit
IF 1616 - Flange Gasket Replacement Kit
Eaton Specification Sheet - EBMBA WT40EHD34
Explosionproof construction with a copper-free aluminum enclosure provides rugged protection in chemical plants, oil and gas facilities, and other hazardous locations, reducing corrosion risk and maintenance intervals while meeting area classification requirements. The business impact is lower total cost of ownership through longer service life and fewer mid-cycle replacements, with direct application in hazardous atmospheres where safety and reliability are non-negotiable. The EHD frame, three-pole configuration, and 480 Vac/250 Vdc rating enable scalable protection for three-phase systems without system redesign, improving project timelines and reducing retrofit complexity in industrial plants. The bolted/ground joint/gasketed cover keeps contaminants out, simplifying inspection and service while preserving enclosure integrity under vibration and thermal cycling. With a 100A frame and a 15–70 A range, this breaker supports diverse load profiles, decreasing procurement variety and improving stock management. Certifications from UL, NEC/CEC, and diverse NEMA ratings streamline audits and cross-border installations, while compatibility with EBMB accessories and installation sheets accelerates commissioning and reduces field risk. Access to SP3D design packages, catalogs, and instruction sheets supports engineering workflows and on-time delivery.
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FAQs
This model uses the standard EBMB form factor with an EHD frame and three-pole construction, designed to drop into compatible EBMB panels. It features a bolted/ground joint with gasketed enclosure, ensuring a watertight, dust-tight fit. Refer to IF 1616 or IF1149/IF1150 installation sheets for gasket replacements and mounting torque, which helps avoid field fit issues and reduces commissioning time.
The EBMB WT40EHD34 provides a 15–70 A amperage range with a three-pole configuration and a 40 A trip characteristic. It is rated for 480 Vac / 250 Vdc, and uses a 100 A frame size. This combination supports flexible protection across three-phase loads while aligning with typical industrial distribution panels in hazardous environments.
Yes. The EBMB series is certified for Hazardous/Classified Locations, including Class I, Division 1 and Division 2, as well as Class II and Class III environments. This makes it appropriate for oil and gas, chemical processing, and other facilities requiring explosionproof protection and NEC/CEC compliance.
It carries NEC/CEC compliance, UL certification for hazardous locations, and a broad NEMA rating set (3, 3R, 4, 7, 9, 12). These certifications support regulatory audits, cross-border installations, and safer operation in harsh industrial settings, facilitating smoother procurement and maintenance planning.
Eaton provides installation sheets, SP3D design packages, catalogs, and the Eaton specification sheet for the EBMBA WT40EHD34. These resources cover mounting, enclosure gasket kits, and electrical connections, accelerating design integration, on-site commissioning, and long-term maintenance planning.