Allen-Bradley 140M-C2E-C10 Motor Protection Circuit Breaker
The Allen-Bradley 140M-C2E-C10, also cataloged as the 140M-C2E-C10 Motor Protection Circuit Breaker, operates as a dedicated hardware component for motor branch circuit protection within industrial motor control systems. The device combines adjustable thermal overload protection and fixed magnetic short-circuit protection in a compact three-pole enclosure.
Hardware Specifications
| Parameter |
Specification |
| Model |
140M-C2E-C10 |
| Brand |
Allen-Bradley |
| Origin |
USA |
| Weight |
0.32 kg |
| Dimensions |
90 mm x 45 mm x 74.5 mm |
| Operating Temp |
-25 deg C to +60 deg C |
| Power Consumption |
Not applicable |
| Product Type |
Motor Protection Circuit Breaker |
| Current Adjustment Range |
6.3 A to 10.0 A |
| Magnetic Trip Current |
130 A Fixed |
| Rated Operational Voltage |
Up to 690 V AC |
| Rated Insulation Voltage |
690 V AC |
| Rated Impulse Withstand Voltage |
6 kV |
| Trip Class |
Class 10 |
| Number of Poles |
3 |
| Breaking Capacity at 400/415 V AC |
100 kA |
| Maximum Motor Rating at 460 V AC |
7.5 HP |
| Maximum Motor Rating at 690 V AC |
7.5 kW |
| Protection Class |
IP2X |
| Control Mechanism |
Rotary Turn Button |
| Mechanical / Electrical Life |
100,000 Operations |
| Storage Temperature |
-40 deg C to +80 deg C |
| Maximum Installation Altitude |
2000 m |
Motor Protection and Backplane Control Integration
The 140M-C2E-C10 combines thermal and magnetic tripping functions for motor feeder protection. The adjustable thermal setting allows alignment with motor full-load current requirements, while the fixed magnetic trip threshold provides short-circuit protection. The device can be integrated with motor starters, contactors, and PLC-based motor control architectures.
Frequently Asked Questions
Q: What motor current range can be adjusted on this breaker?
A: The thermal overload adjustment range is 6.3 A to 10.0 A.
Q: What magnetic trip level is provided?
A: The breaker includes a fixed magnetic trip setting of 130 A.
Q: How many poles are included in the device?
A: The 140M-C2E-C10 is a 3-pole motor protection circuit breaker.
Field Installation Guidelines
-
Mount the breaker inside a suitable motor control panel or enclosure.
-
Adjust the thermal setting to match the motor full-load current rating.
-
Verify all power conductors are terminated securely at the screw terminals.
-
Connect protective earth conductors according to applicable electrical standards.
-
Maintain separation between power wiring and low-level control circuits.
-
Verify short-circuit coordination requirements before commissioning.
-
Inspect terminal tightness periodically during preventive maintenance.
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