The Allen-Bradley 140-A11 is an auxiliary contact device for the Bulletin 140-MN contacts. This auxiliary contact is primarily used for swapping current flow of no more than 10 amperes. This auxiliary contact includes timer relays and protection relays, among other features. This Allen-Bradly auxiliary contact device is a standard (limited-power) relay that is constructed as a "regular" auxiliary contact device and, therefore, is termed an auxiliary contactor when utilized in conjunction with another contactor. To specify the fact that it is not used for swapping loads, but rather for activation / deactivation or used to either integrate or disintegrate a circuit. In short, to regulate load contacts. As a result, this auxiliary contact device has no primary contacts and just has auxiliary connections. The Allen-Bradley 140-A11 auxiliary contact device for 140-MN supports 2-poles and has one normally open (N.O.) and one normally closed (N.C.) contact, thus fulfilling basic requirements of the manufacturer. Due to it being utilized for command, signaling, alert, and feedback (circuit), this auxiliary contact may also be termed as a helping contact.

Furthermore, the Allen-Bradley 140-A11 contactor is mounted externally, with a spacing of 54 millimeters. This device weighs approximately 4.8 ounces. Being a circuit breaker, Bulletin 140 complies with IEC/EN 60947-2. This component doesn't fulfill the UL and CSA criteria for circuit breakers. Bulletin 140 is a manually operated motor controller, and it is UL classified (UL508) & CSA approved for group motor installation. All installments, configurations, and servicing must be performed by qualified individuals who are familiar with local standards.