Rockwell Automation Releases New Bulletin 140MT Motor Protection Products

Nov. 3, 2021
The new Allen-Bradley Bulletin 140MT motor protection circuit breakers from Rockwell Automation offer enhanced Type F combination motor controller ratings when used with Bulletin 100-C and 100-E contactors.

Industrial operators can realize cost savings in their applications using the new Allen-Bradley Bulletin 140MT motor protection circuit breakers and circuit protectors, which are available in sizes up to 40 amps. 

The new Bulletin 140MT products offer enhanced Type F combination motor controller ratings when used with Bulletin 100-C and 100-E contactors, enabling assembled starters to be applied without additional branch circuit protection. Tap conductor protection ratings mean these devices can be wired with smaller conductors in group motor installations to save costs. 

The products are available as motor circuit protectors for three-component starters and motor protection circuit breakers for two-component starters. Special 140MT product variants also address specific applications, like providing protection at output of variable frequency drive (VFD) in multi-motor applications or protection of high-inrush, high-efficiency motors.

Part of the Allen-Bradley Modular Control System, Bulletin 140 products are available with connectors to enable direct wiring to Bulletin 100-K/C/E contactors. 

Modular Control System components are tested together in various combinations to give users worldwide standards compliance and certification. The components are also backed by global sales and support. Learn more at

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