Eaton EBMBA WT20EHD34 Three-Pole Circuit Breaker - 480 Vac
Part Number: EBMBA WT20EHD34
Quick Summary
The Eaton EBMBA WT20EHD34 is a three-pole circuit breaker engineered for hazardous and classified locations. It helps plants reduce arc-flash risk and simplify maintenance in demanding environments. Key certifications include NEC/CEC compliance and hazardous-location ratings for Class I, Division 1 and 2, plus Class II and III, with broad NEMA ratings 3, 3R, 4, 7, 9 and 12 that support diverse industrial uses. The 15–70 A range on a 100 A frame, with a copper-free aluminum enclosure, delivers reliable protection while keeping weight and footprint manageable. Bolted grounding, gasketed covers, and compatibility with Eaton’s EBMB line enable straightforward installation and lower lifecycle costs.
Product Information
Extended Description
EBMBA WT20EHD34 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, 20A trip, 480 Vac/250 Vdc
Product Name
Eaton Crouse-Hinds series EBMB circuit breaker
Catalog Number
EBMBA WT20EHD34
UPC
782274911977
Product Length/Depth
14.78 in
Product Height
19.4 in
Product Width
10.25 in
Product Weight
102 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 1150 - EBM Motor Control Series Combination Line Starters, Motor Starters, Circuit Breakers
IF 1150 - EBM Motor Control Series Combination Line Starters, Motor Starters, Circuit Breakers
IF 1150 - EBM Motor Control Series Combination Line Starters, Motor Starters, Circuit Breakers
Eaton Specification Sheet - EBMBA WT20EHD34
Explosionproof design with the EHD frame provides safe, explosionproof circuit protection for hazardous locations. It helps reduce ignition risk and unplanned outages by maintaining enclosure integrity under demanding conditions. Application: Oil and gas, chemical processing, and mining environments where equipment must withstand explosive atmospheres. Wide amperage range from 15 to 70 A within a 100 A frame reduces spare-part inventory and simplifies protective device coordination across multiple panels. Application: Panel builders and MCCs needing configurable protection without adding part numbers. Copper-free aluminum enclosure with bolted/ground joint and gasketed cover offers a lightweight, durable, and sealed enclosure that improves serviceability and lifecycle costs. Application: Harsh environments where enclosure sealing is critical. The 480 Vac / 250 Vdc rating and three-pole configuration enable coverage for mixed power and DC control circuits, reducing wiring complexity and installation time. Application: Main feeders and motor circuits in hazardous locations. NEC/CEC compliance, hazardous-location area classifications, and broad NEMA ratings (3, 3R, 4, 7, 9, 12) support regulatory readiness, faster audits, and smoother approvals. Application: Industries with strict safety and regulatory requirements, including chemical plants, refineries, and mining sites.
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FAQs
Designed for hazardous and classified locations, the EBMBA WT20EHD34 provides explosionproof protection for oil, gas, chemical processing, and mining facilities. It supports Class I Division 1 & 2 and Class II Division 1 & 2 (and Class III) with NEC/CEC compliance and broad NEMA ratings. Install it in switchgear, motor control centers, or distribution panels where reliable isolation is essential and space is at a premium.
The EBMBA WT20EHD34 is a three-pole device rated for 15–70 A within a 100 A frame, and it handles 480 Vac and 250 Vdc. It features a copper-free aluminum enclosure, EHD frame, and enclosure construction with bolted/ground joint and gasketed cover, enabling robust protection and straightforward integration with the EBMB family.
Its gasketed enclosure and bolted ground joint preserve enclosure integrity against dust, moisture, and corrosive atmospheres, reducing nuisance trips and maintenance eyebrows. The 15–70 A range minimizes changeovers and stocking complexity, while compatibility with installation resources like SP3D design packages and instruction sheets speeds commissioning and field service.
Yes. The product is aligned with NEC/CEC requirements and hazardous-location area classifications, including Class I Division 1 & 2, Class II Division 1 & 2, and Class III, plus broad NEMA ratings (3, 3R, 4, 7, 9, 12). UL certification documents are available as downloadable references to support regulatory verification and audits.
Available resources include bolted grounding, gasketed cover configurations, and compatibility with the EBMB explosionproof line. You can access SP3D design packages, catalogs, installation sheets, and the Eaton specification sheet to confirm part numbers, mounting, and wiring standards, ensuring a smooth rollout from design to commissioning.