Eaton HMA3400T Circuit Breaker
- 400
- 3 Pole
Quantity
Eaton HMA3400T 3 Pole Circuit Breaker
Re-Certified
Quantity
Description
Eaton HMA3400T 3 Pole Circuit Breaker
The Eaton HMA3400T is a 3 Pole thermal magnetic molded case circuit breaker with a current rating of 400 Amps and a voltage rating of 600VAC. It has an adjustable trip functions.
Specifications
Product FAQs
7 answersWhat frame family does the Eaton HMA3400T belong to?
The HMA3400T is part of the legacy Westinghouse and Eaton Cutler-Hammer MA and HMA frame family. It is designed to fit standard M frame footprints in industrial switchboards and motor control centers.
What does the T suffix in the HMA3400T catalog number indicate?
In Eaton and Westinghouse nomenclature, the T suffix designates the trip unit. While often supplied pre-assembled in a frame as a complete circuit breaker, the HMA3400T specifically refers to the 400A interchangeable thermal magnetic trip unit.
Can the HMA3400T replace older Westinghouse circuit breakers?
Yes. Eaton acquired the Westinghouse distribution equipment line, and the HMA3400T serves as a direct replacement for legacy Westinghouse and Cutler-Hammer HMA frame breakers with matching specifications.
Are mounting terminals included with the HMA3400T?
Terminals and mounting hardware are typically shipped separately from the breaker frame. You must verify your existing busbar connections, cable sizes, and lug requirements before installation.
What does the H designation in the HMA3400T series mean?
The H indicates that this is the high interrupting capacity version of the standard MA frame circuit breaker. It is designed to safely clear higher fault currents than the standard rated versions.
What is the adjustable magnetic trip range for the HMA3400T?
The thermal magnetic trip unit features adjustable magnetic trip settings ranging from 2000 to 4000 amperes. This allows electricians to fine-tune the instantaneous short circuit response to match specific load requirements and prevent nuisance tripping.
What safety standards does the Eaton HMA3400T meet?
Eaton molded case circuit breakers are built to meet NEMA standards and are UL Listed for safe application in low voltage distribution systems, motor control centers, and panelboards.
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