
TLB434400 - 400Amp Circuit Breaker Description
TLB434400 - 400 Amp Circuit Breaker
The TLB434400 circuit breaker is designed for your electrical systems that require dependable 400-amp protection in a three-phase setup. With a 3-pole design, this breaker is often used in commercial buildings, industrial facilities, and distribution equipment where steady power management is important. It helps protect circuits from overloads and short circuits while fitting into existing electrical systems that still rely on proven components. Simple, durable, and built for everyday use, the TLB434400 remains a practical replacement option for maintaining older equipment and keeping operations running smoothly without changing system layouts or configurations.
Key Features and Benefits
- 400 amp protection: Designed for commercial and industrial power systems that require dependable circuit protection.
- 3-pole breaker: Designed for three-phase applications commonly found in large electrical systems.
- Overload and short circuit protection: Helps reduce damage caused by overloads and short circuits.
- Existing equipment compatibility: Suitable for existing electrical distribution equipment where maintaining compatibility is important.
- Built for demanding environments: Constructed for long-term use in commercial and industrial applications.
-
Replacement functionality: Designed for proper form, fit, and functional replacement needs.
Technical Specifications
-
Part Number: TLB434400
-
Poles: 3
-
Amperes: 400A
-
Type: Molded Case Circuit Breaker
Material Compliance and Certifications
- Application Guidance: The TLB434400 is intended for use in electrical distribution systems that require properly rated circuit protection components.
-
Compliance Information: Compliance markings and certifications can vary by production series and application requirements. Always verify system compatibility and local code requirements before installation.
Where It Works Best
- This breaker is commonly installed in commercial properties, industrial facilities, service equipment, and electrical distribution panels that operate on three-phase power. It is especially useful for maintaining existing systems where matching specifications and compatibility are important.
Use of Original Equipment Manufacturer (OEM) trademarks, names, and logos is for informational and identification purposes only. This does not imply any affiliation, sponsorship, endorsement, or approval by the original equipment manufacturer. CIRCUIT BREAKER SUPERSTORE® is an independent reseller and is not an authorized distributor, affiliate, or representative of any manufacturer. Manufacturer warranties do not apply unless expressly stated. All trademarks and registered trademarks are the property of their respective owners.
GE®, and ABB® are registered trademarks of General Electric Company and ABB Ltd., respectively. Products sold are surplus, used, or refurbished and are NOT supplied by General Electric Company or ABB Ltd., or their affiliates.
Specifications
- Poles:3
- Amperes:400
Returns are easy
You may return unused items within 30 days of delivery for a full refund.
FREE shipping on breaker orders over $100 and all other items with orders over $500.
CIRCUIT BREAKER SUPERSTORE® offers one to five day delivery in the United States. The variation depends on the chosen shipping speed and the warehouse location for the product(s).
Same Day Shipping
We strive to ship out your items within one business day.
In rare circumstances, CIRCUIT BREAKER SUPERSTORE® may reserve up to 5 business days to complete shipment. Feel free to contact us if your order is time sensitive.
CIRCUIT BREAKER SUPERSTORE® provides a limited 1-year warranty on both new and reconditioned products. Rest assured, all products are authentic OEM (original equipment manufacturer).

