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- Allen-Bradley
- 140G-K3F3-D40
- Molded Case Circuit Breaker
- USA
- 205 x 108.5 x 140 mm
- 3.25 kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
- DHL, UPS, TNT, FedEx and EMS.
- 24-Hour Service
- COO
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Our advantage
Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Product Overview
The Allen-Bradley 140G-K3F3-D40 Molded Case Circuit Breaker is a high-capacity industrial protection device designed for reliable circuit protection in power distribution and motor control applications. Engineered for industrial automation systems, this molded case circuit breaker provides dependable protection against overloads, short circuits, and electrical faults in demanding operating environments.
As part of the Allen-Bradley 140G series, the 140G-K3F3-D40 combines robust construction with advanced thermal magnetic protection characteristics, making it suitable for industrial facilities requiring stable and secure electrical system operation. Its compact molded case design supports efficient installation in industrial control panels and power distribution systems.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen-Bradley |
| Model | 140G-K3F3-D40 |
| Product Type | Molded Case Circuit Breaker |
| Breaker Type | Thermal Magnetic MCCB |
| Number of Poles | 3 Pole |
| Rated Current | 400 A |
| Rated Voltage | Up to 600 V AC |
| Interrupting Capacity | 35 kA |
| Frame Type | K Frame |
| Trip Functions | Long-Time and Instantaneous |
| Mounting Type | Bolt-on mounting |
| Application | Industrial power distribution |
| Dimensions | 205 × 108.5 × 140 mm |
| Weight | 3.25 kg |
| Operating Environment | Industrial electrical systems |
| Reliability | Continuous-duty industrial protection |
Function and Working Principle
The 140G-K3F3-D40 Molded Case Circuit Breaker operates by continuously monitoring electrical current flowing through the circuit. When abnormal conditions such as overloads or short circuits occur, the breaker automatically interrupts the electrical connection to protect equipment and wiring from damage.
Its thermal magnetic protection system combines thermal overload protection with magnetic instantaneous trip functionality for rapid fault interruption.
This enables:
Reliable overload protection
Fast short-circuit interruption
Improved electrical system safety
Protection for motors and industrial equipment
Stable industrial power distribution
The breaker is designed to provide dependable protection performance in demanding industrial automation and power control applications.
Role in Industrial Control Systems
The 140G-K3F3-D40 plays a critical role in industrial electrical systems, supporting:
Power distribution protection
Motor control center applications
Industrial automation systems
Equipment isolation and safety protection
Electrical fault management
Industrial energy distribution networks
It helps improve operational safety and maintain reliable industrial power system performance.
Industrial Applications
The Allen-Bradley 140G-K3F3-D40 is widely used in:
Industrial power distribution systems
Motor control centers
Manufacturing facilities
Process automation systems
Heavy industrial machinery
Conveyor and material handling systems
Power generation and utility applications
It is especially suitable for applications requiring high-capacity industrial circuit protection.
Installation and System Integration
Proper installation ensures safe and reliable operation:
Mounted inside industrial electrical panels
Integrated into motor control and power distribution systems
Connected using industrial bolt-on terminals
Requires proper grounding and protective coordination
Should follow industrial electrical safety standards
Correct installation improves long-term protection performance and operational reliability.
Compatible System Components
The 140G-K3F3-D40 typically works alongside:
Allen-Bradley motor control systems
Industrial switchgear equipment
PLC automation systems
Power distribution panels
Industrial overload protection devices
Variable frequency drive systems
These components together form a complete industrial power protection and automation solution.
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| 140G-J3F3-D20 | Molded Case Circuit Breaker | Medium-capacity protection | Industrial automation |
| 140G-H3C3-C50 | Thermal Magnetic MCCB | Compact design | Power distribution |
| 140U Series Circuit Breakers | Industrial Protection Device | Flexible installation | Industrial systems |
| Siemens MCCB Series | Molded Case Circuit Breaker | High interrupt capacity | Power systems |
| Schneider Compact NSX | Industrial Circuit Breaker | Advanced protection features | Electrical distribution |
Key Advantages
Reliable overload and short-circuit protection
High-capacity industrial circuit breaker design
Thermal magnetic trip functionality
Suitable for demanding industrial environments
Compact molded case construction
Supports stable industrial power distribution
Technical FAQs
What is the primary function of the 140G-K3F3-D40?
It protects industrial electrical systems from overloads, short circuits, and electrical faults.
Where is this molded case circuit breaker commonly used?
It is commonly used in industrial power distribution systems, motor control centers, and automation equipment.
Why is thermal magnetic protection important?
It provides both overload protection and rapid short-circuit interruption for improved electrical safety.
Conclusion
The Allen-Bradley 140G-K3F3-D40 Molded Case Circuit Breaker is a reliable industrial protection solution designed for demanding power distribution and automation applications. Its durable construction, dependable thermal magnetic protection, and high interrupting capability make it suitable for industrial environments requiring stable and secure electrical operation.
For engineers and maintenance professionals, it provides an effective way to improve electrical system protection, enhance operational safety, and maintain reliable industrial power distribution.