Overview
Allen-Bradley 140M-C2E-B25 is a motor protection circuit breaker (MPCB) from Rockwell Automation’s 140M family. This 3-pole, Frame C device provides motor branch circuit protection, overload thermal protection, short-circuit magnetic trip, and manual switching in a single DIN-rail-mounted package.
Key Features
- Adjustable Thermal Trip: 1.6–2.5 A range supports precise matching to motor full-load currents, enhancing protection and extending motor life.
- Fixed Magnetic Trip: Class 10 rating, typically tripping within 10 seconds under overload conditions.
- High Interrupt Rating: 65kA at 480Y/277VAC.
- DIN Rail Mounting: Mounting directly on a DIN rail supports modular installation alongside contactors and accessories.
- Visual Indicators: Visual trip and test indicators simplify troubleshooting and status monitoring.
- Phase Loss Protection: Incorporates phase loss protection and current limiting.
Technical Specifications
- Product Family: Bulletin 140M
- Frame Size: C (32 A)
- Poles: 3
- Adjustable Trip Range: 1.6–2.5 A
- Magnetic Trip: Fixed at 13 × Ie
- Rated Voltage: 480Y/277 VAC (600 VAC rated)
- Interrupt Rating: 65 kAIC
- Trip Class: 10
- Mounting Type: 35 mm DIN Rail
- Terminal Type: Screw Terminals
- Operating Temperature: −25 to +60 °C
- Certifications: UL, cUL, CCC
Typical Applications
Bulletin 140M MPCB for motor branch circuit protection. Commonly used for:
- Three-phase motor protection (0.37–1.8 kW)
- Branch circuit overload and short-circuit protection
- Manual motor control in combination with contactors
- Type F combination motor controller pairing with 100-C series contactors
- Industrial control panels and motor starter enclosures
- Self-Protected Combination Motor Controller suitable for motor branch circuit protection and disconnecting means in accordance with NEC/CEC requirements
Compatibility & Replacements
Compatible With
- Rockwell Automation 100-C series contactors (Type F combination motor controller)
- Allen-Bradley 140M-C series auxiliary contacts
- Standard 35 mm DIN rails
- Industrial motor control circuits (NEC Article 430 compliant)
- Three-phase motors rated 480V AC
Replaces / Drop-In Replacement For
- This unit is replaced by the 140MT-C3E-B25
- 140M-C2E-A25 (lower voltage variant)
Works With
- Rockwell Automation Studio 5000 (for system integration design)
- Industrial automation systems operating under NEC Article 430 (Motor Protection)
- EtherNet/IP and PROFINET networked motor control systems
- Manual motor control applications without fieldbus integration
