Overview
The Allen-Bradley 140-A11 auxiliary contact is a proven component for extending contactor functionality in motor control and lighting circuits. This two-pole contact block provides 1 normally open (NO) and 1 normally closed (NC) contact, enabling flexible interlocking and status indication logic on 140-MN series contactors and starters. Manufactured in Switzerland, the 140-A11 has earned trust in industrial facilities for decades of reliable performance.
Key Features
- 1 Normally Open + 1 Normally Closed pole configuration for versatile control logic
- 10-ampere rated current capacity at 600VAC operation
- Two-pole design for independent control circuits
- External mounting on 140-MN bulletin contactors
- Compact, space-saving package design
- Swiss-manufactured construction proven in harsh environments
Technical Specifications
| Contact Configuration | 1 Normally Open + 1 Normally Closed (1NO/1NC) |
| Poles | 2 |
| Current Rating | 10 A |
| Voltage Rating | 600 VAC |
| Compatibility | Bulletin 140-MN Contactors and Starters |
| Mounting Type | External Mount |
| Weight | 0.09 lbs (50 g) |
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Country of Origin | Switzerland |
| Series | C |
| Standards Compliance | IEC 947, EN 60947 AC-1 |
Typical Applications
- Motor starter interlocking and feedback circuits
- Contactor status indication and pilot control
- Lighting circuit control and monitoring
- Machine tool automation and interlock logic
- Industrial control panel expansion
Compatibility & Replacements
The 140-A11 is designed specifically for Bulletin 140-MN contactor installations. This block mounts externally and can be added to existing 140-MN starters to add auxiliary switching capability without replacing the main contactor. As a legacy part (discontinued by manufacturer in 2008), in-stock refurbished and surplus units remain available through authorized distributors including MROSupply, Radwell, and other industrial suppliers. Compatible mounting configurations ensure drop-in operation on original equipment.
