Bulletin 140M to 140MT Motor Protection Circuit Breakers

Mitigate and Eliminate the Risks of Automation Obsolescence

Rockwell Automation understands that your Motor Protection Circuit Breakers and Molded Case Circuit Breakers are critical assets in your automation system and supports that by providing you with the latest technology to maximize your investment. New technologies can improve and extend the operation of existing equipment and provide an immediate boost to productivity. By migrating from your legacy 140M and 140U product to new 140MT and 140UT Motor Protection Circuit Breakers and Molded Case Circuit Breakers, you can help to decrease downtime and optimize operations well into the future.

140mt -c and -d frames motor protection obsolescence

Start planning your migration

We will help you to meet this demand to innovate by proactively planning and managing your transition every step of the way to help you get the highest possible return on your automation investment.

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New Product Overview

  • 140MT-C frame is up to 32A and 140MT-D frame is extending current range up to 40A
  • 140UT are very compact UL 489 and IEC 60947-2 MCCB up to 40A
  • Higher short circuit ratings and application coverage (tap conductor protection and Type E ratings) for 140MT-D
  • Improved thermal performance compared to existing product line (lower heat loss)
  • Different product variants (MCP, High inrush version, D9V for application at output of Drives) are covered by single frame size D.
  • Lockable knob and anti-tamper shield as standard offering for 140MT-D
  • Connecting modules and Combination
  • SCCR tested with 100-E, 100-C and 100-K contactors.
  • Back feeding capability for 140MT and 140UT

Additional Resources:

Why Upgrade or Migrate?

With the launch of the new 140MT Motor Protection Circuit Breaker and 140UT Molded Case Circuit Breaker by mid of August 2021, Rockwell Automation will announce the discontinuation of the existing 140M (C- and D-frame) and 140U (D-frame) Products with short migration time line (Discontinuation date of ~March 2022)

We will continue to serve our customers with the balance of the 140M that is F frame up to 45A.

Everything You Need to Succeed

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