Key Product Data
Catalog Number: 140M-C-AFA11
Manufacturer: Allen-Bradley / Rockwell Automation
Product Family: Bulletin 140M Accessories
Component Type: Internal Auxiliary Contact Block
Contact Configuration: 1 Normally Open + 1 Normally Closed
Mounting Position: Front-mounted
Terminal Type: Without spring clamp terminals
Space Requirement: No additional width
Compatible Frames: 140M-C, 140M-D, 140M-F; 140U-D under specified conditions
UPC: 662468966788
Lifecycle Status: Discontinued
Discontinued Date: March 31, 2024
Engineering Replacement: 140MT-C-AFA11
A Status Signal Accessory for 140M Motor Protection Circuit Breakers
The Allen-Bradley 140M-C-AFA11 is a front-mounted auxiliary contact block designed for compatible Bulletin 140M motor protection circuit breakers. It provides one normally open contact and one normally closed contact, allowing the circuit-breaker operating state to be reflected in an external control or indication circuit.
Rather than carrying the main motor current, this accessory provides auxiliary switching signals. These can be used in control-panel arrangements for status indication, interlocking logic or other control functions that depend on the operating position of the associated protective device.
Its front-mounted construction does not require additional device width, which is useful when maintaining compact motor-control assemblies.
How the NO and NC Contacts Behave
The 140M-C-AFA11 combines two auxiliary contact functions in one accessory:
| Contact | Terminal designation | Contact behaviour |
|---|---|---|
| Normally Open (NO) | 13–14 | Closes when the operator is in the ON position |
| Normally Closed (NC) | 21–22 | Opens when the operator is in the ON position |
Rockwell's technical documentation also shows the contact-state information for OFF, ON and tripped positions. The NO and NC contacts provide complementary status signals for the connected control circuit.
This arrangement can support applications that need both a positive operating indication and a complementary status signal from the same protective device.
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Installation Fit and Frame Compatibility
The AFA11 is a front-mounted accessory for the specified 140M circuit-breaker frames. Rockwell lists compatibility with 140M-C, 140M-D and 140M-F frames. The documentation also identifies 140U-D use under a specific condition: UL 489 application only when combined with the 140M-C-AFC.
The accessory is designed to avoid additional width on the breaker assembly, and only one front-mounted auxiliary contact block is permitted per device according to the 140M technical documentation.
The terminal version is specified without spring clamp terminals. This is an important detail when comparing the existing accessory with a replacement.
Discontinued Status and Replacement Reference
Rockwell Automation lists 140M-C-AFA11 as discontinued effective March 31, 2024. Its product page identifies 140MT-C-AFA11 as the engineering replacement.
The successor should be treated as a replacement reference, not automatically assumed to be identical in every installation detail. Before changing the installed part, verify the breaker family, mounting arrangement, contact configuration and terminal requirements against the applicable 140MT documentation.
For customers maintaining older 140M installations, the original catalog number remains useful when identifying existing equipment and sourcing the specified legacy component.
Purchasing Checks
Before ordering this auxiliary contact, confirm:
- The installed breaker belongs to a compatible 140M frame family.
- The required contact arrangement is one NO and one NC.
- The installation calls for a front-mounted accessory.
- The existing wiring is compatible with the version without spring clamp terminals.
- The application requires an auxiliary status contact rather than a trip-indication contact.
If selecting the successor, the 140MT-C-AFA11 is verified against the actual breaker and installation.
Frequently Asked Questions
What does the 140M-C-AFA11 do?
It provides one normally open and one normally closed auxiliary contact for compatible Allen-Bradley motor protection circuit breakers.
Is it a side-mounted contact block?
No. The 140M-C-AFA11 is front-mounted and does not add width to the breaker assembly.
Which breaker frames can use this accessory?
Rockwell lists 140M-C, 140M-D and 140M-F frames, as well as 140U-D under the specified UL 489 condition when combined with 140M-C-AFC.
Is 140M-C-AFA11 still manufactured?
Rockwell lists it as discontinued effective March 31, 2024.
What is its recommended replacement?
Rockwell identifies 140MT-C-AFA11 as the engineering replacement. Verify the successor's compatibility with the installed breaker before ordering.
What is the UPC?
The UPC supplied for 140M-C-AFA11 is 662468966788.
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