Allen Bradley 140U-M6D3-D80 β Molded Case Circuit Breaker, M-Frame (up to 800A), 60...69 kA, T/M -
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Part Specification
| Brand / Manufacturer | Allen Bradley |
|---|---|
| Product type | Safety and General Automation |
Description
Molded Case Circuit Breaker, M-Frame (up to 800A), 60…69 kA, T/M – Fixed Thermal / Adjustable Magnetic, Rated Current 800A
The 140U-M6D3-D80 is a molded case circuit breaker manufactured by Allen Bradley. The circuit breaker belongs to the M-frame series and has a rated current of up to 800A. It is designed to provide protection against overloads and short circuits in electrical systems.
With a breaking capacity ranging from 60 to 69 kiloamperes (kA), the 140U-M6D3-D80 circuit breaker is capable of interrupting current flow in the event of a fault, ensuring the safety of the electrical system and the connected equipment. The breaking capacity refers to the maximum current the circuit breaker can safely interrupt without causing damage.
The 140U-M6D3-D80 operates on a combination of fixed thermal and adjustable magnetic mechanisms. The fixed thermal mechanism provides overload protection by tripping the circuit breaker when the current exceeds a predetermined threshold for a specific period. The adjustable magnetic mechanism, on the other hand, offers short circuit protection by sensing high currents and quickly tripping the breaker to halt the fault.
Allen Bradley has designed the 140U-M6D3-D80 circuit breaker with a rated current of 800A to handle heavy loads within the electrical system.

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