Description
Product Name ：140MG-J8P-D25 Allen‑Bradley I/O module
Product details:
The Allen-Bradley 140MG-J8P-D25 is a J-Frame Motor Circuit Protector (MCP) belonging to the Bulletin 140MG product family. It is an application-specific molded case device designed to provide premium branch-circuit, short-circuit (magnetic-only) protection for industrial three-phase motor loads.
Unlike a standard Molded Case Circuit Breaker (MCCB) or Motor Protection Circuit Breaker (MPCB), an MCP features an adjustable magnetic trip mechanism without an internal thermal overload element. This means it is engineered to handle massive short-circuit currents while relying on a separate, dedicated overload relay downstream to manage thermal overloads.
Product Parameters & Specifications
| Parameter | Specification Details |
| Brand / Manufacturer | Allen-Bradley / Rockwell Automation |
| Bulletin / Line | Bulletin 140MG (Motor Circuit Protectors) |
| Catalog Number | 140MG-J8P-D25 |
| Frame Size | J-Frame (Up to 250 A capacity) |
| Rated Current (I_n) | 250 A (Indicated by the “D25” code) |
| Number of Poles | 3-Pole |
| Trip Unit Type | Adjustable Magnetic Only (Short-circuit protection) |
| Operating Voltage | Up to 600V AC / 690V AC (Global application) |
| Interrupting Rating Class | Standard High Interrupting Capacity (“8P” configuration) |
| Standards & Certifications | UL 489 Recognized, CSA C22.2 No. 5, CE Marked, IEC 60947-2, CCC |
Product Advantages
- High Current-Limiting Capacity: It rapidly restricts peak let-through currents during severe electrical faults, protecting downstream components (like contactors and overload relays) from major thermal and mechanical stress.
- Precise Short-Circuit Control: Features adjustable magnetic trip settings (typically via a front dial) to accommodate varying motor inrush currents without causing nuisance tripping.
- Space-Saving Footprint: The J-Frame delivers high-level short-circuit interrupting ratings in a highly compact chassis, saving valuable panel board enclosure space.
- Global Compatibility: Fully certified under both UL/CSA (North America) and IEC/EN (Global) standards, making it ready for international machinery distribution.
- Modularity: Shares a wide array of internal and external field-installable accessories with the standard Bulletin 140G family (e.g., auxiliary contacts, shunt trips, and rotary door operating handles).
Technical Considerations & Precautions
⚠️ CRITICAL SAFETY NOTE: > Because this device is a Magnetic-Only Motor Circuit Protector, it does not provide motor thermal overload protection. Under UL/NEC regulations, it is recognized rather than listed as a standalone breaker. It MUST be paired with a separate, correctly sized thermal or electronic overload relay downstream to protect the motor from overheating or phase loss.
- Sizing Accuracy: Ensure that the 250 A frame is properly matched to the Full Load Amps (FLA) and lock-rotor inrush characteristics of your specific motor.
- Dial Settings: Before energizing the system, the magnetic trip settings must be verified and adjusted according to your local electrical code requirements (e.g., NEC Article 430 in the US).
- Environment: Ensure installation takes place within recommended operating temperature bounds and clean industrial panel environments to prevent debris from degrading the mechanical trip linkage.
Product Applications
The 140MG-J8P-D25 is primarily integrated into Industrial Control Panels for heavy-duty motor control. Typical application environments include:
- Multi-Motor Starter Combinations: Used in “Type 2” coordination starter setups alongside Allen-Bradley Bulletin 100-C or 100-D contactors and Bulletin 193 overload relays.
- Heavy Industry Machinery: Deployed in demanding motor tasks such as large conveyors, water pumps, industrial industrial exhaust fans, compressors, and material handling systems.
- Motor Control Centers (MCCs): Fits cleanly inside standard MCC bucket spaces to serve as the branch disconnect and dedicated magnetic trip guard for higher horsepower motors.
Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!
We have the same series of models in stock. If you don’t find the model you need, please contact us and we will provide you with an official quotation！
Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
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