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Allen Bradley 140G-K3F4-D40 Molded Case Circuit Breaker
- Product Details
- FAQs
- Related
- Contact Us
- Packing & Delivery
- Product Ratings
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.
FAQ
- What is the advantage of a 4-pole MCCB?
It allows complete isolation of all conductors, including the neutral, improving safety in certain electrical systems. - What does a 35 kA breaking capacity mean?
It indicates the maximum fault current the breaker can safely interrupt without damage. - Why are adjustable thermal and magnetic settings important?
They allow customization of protection levels based on specific load and fault conditions. - What applications is this breaker best suited for?
It is ideal for industrial power distribution, motor control, and systems requiring neutral isolation. - What does the 80% rating indicate?
It means the breaker can continuously carry 80% of its rated current under standard conditions. - Can this MCCB be mounted on bus bars?
No, this model is designed for panel mounting only. - What is the function of the thermal-magnetic trip unit?
It provides protection against both overload (thermal) and short-circuit (magnetic) conditions. - Is this breaker suitable for three-phase systems?
Yes, it is designed for three-phase systems and can also handle neutral protection due to its 4-pole design. - What should be considered when selecting this MCCB?
Consider system voltage, load current, fault level, and required protection characteristics. - Is this breaker suitable for continuous industrial use?
Yes, it is designed for reliable operation in demanding industrial environments.
Related Models
| Model | Description |
|---|---|
| 140G-K3F3-D40 | 3-pole version |
| 140G-K3F4-D50 | Higher current variant |
| 140G-K3F4-C40 | Different trip configuration |
| 140G-H3F4-D40 | Larger frame size |
| 140G-K3F4-D32 | Lower current model |
| 140G-K3F4-D63 | Extended range version |
Popular Models
| Model | Description |
|---|---|
| 140G-H3F3-D50 | High-capacity MCCB |
| 140G-K2F3-D25 | Compact MCCB |
| 140M-C2E-B25 | Motor protection breaker |
| 1492-SPM1C100 | Supplementary protector |
| 140G-J3F3-D16 | Small frame MCCB |
| 140U-K6D3-C63 | UL-rated circuit breaker |
| Company Information | ||||||||
| [email protected] | ||||||||
| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Excellent PLC Co., Ltd. has a large number of brand new and original PLC and DCS spare parts, with more than 60 cooperative countries. All products are guaranteed for 1 year and delivered to you by high-quality express. We are committed to using the best products and the most favorable prices to meet the needs and friendship of our customers. We have won the trust of thousands of customers, including these excellent customers.
As for the delivery time, when we receive your order requirements, we will arrange for warehouse personnel to test and verify the products. After you place the order, we will send it to you within 24 hours.
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