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Product Introduction
The Allen Bradley 140G-K3F4-D40 Molded Case Circuit Breaker is a high-performance molded case circuit breaker (MCCB) designed to provide reliable protection for industrial power distribution systems. As part of the 140G series, this model is built to handle demanding electrical loads while ensuring safety against overloads and short-circuit conditions.
With a rated current of 400 A and a breaking capacity of 35 kA at 480 V, this breaker is suitable for medium to high-power applications. The K frame design offers a compact footprint while maintaining high interrupting capacity. It features a thermal-magnetic (T/M) trip unit with adjustable thermal and magnetic settings, allowing flexible protection tuning based on system requirements.
This 4-pole configuration makes it ideal for applications requiring neutral line protection or complete circuit isolation. Designed as an 80% rated MCCB, it ensures stable continuous operation within defined limits. The unit is panel mountable and does not support bus bar mounting, offering flexibility in installation.
Product Specifications
| Parameter | Description |
|---|---|
| Product Model | 140G-K3F4-D40 |
| Series | 140G MCCB |
| Frame Type | K Frame |
| Rated Current | 400 A |
| Number of Poles | 4 Pole |
| Breaking Capacity | 35 kA @ 480 V |
| Trip Unit Type | Thermal-Magnetic (Adjustable) |
| Thermal Setting | Adjustable |
| Magnetic Setting | Adjustable |
| Utilization Rating | 80% Rated |
| Mounting Type | Panel Mountable |
| Bus Bar Compatibility | No Bus Bar Mounting |
| Standards | IEC |
| Dimensions | 205 × 103.5 × 185 mm |
| Weight | 4.15 kg |
Applications
● Industrial Power Distribution Systems
Reliable circuit protection ensures safe operation under high load conditions.
● Three-Phase + Neutral Systems
4-pole configuration provides full isolation including the neutral line.
● Control Panels and Switchgear
Compact K frame design allows efficient integration into electrical panels.
● Motor Control Applications
Adjustable trip settings enable tailored protection for different load profiles.
● Energy and Utility Infrastructure
High interrupting capacity protects critical systems from fault currents.
Advantages
● High Breaking Capacity
35 kA at 480 V ensures strong protection against short-circuit faults.
● Flexible Protection Settings
Adjustable thermal and magnetic trip allows precise system configuration.
● 4-Pole Protection
Full circuit isolation including neutral enhances safety in complex systems.
● Compact and Robust Design
K frame structure balances size and performance for industrial use.
● Installation Flexibility
Panel mountable design supports various installation configurations.
● Reliable Continuous Operation
80% rated MCCB ensures stable long-term performance.
