Industrial TB340 40A 3-Pole 240 V Circuit Breaker Potential Transformer

Meet the Industrial TB340—a robust circuit breaker designed for demanding 3-phase electrical systems. With a 40 A current rating and 240 V operating voltage, this 3-pole breaker is built to reliably protect power distribution in factories, workshops, and industrial facilities. Its compact, purpose-built design makes it an essential component for safeguarding motors, feeders, and critical equipment in demanding environments.

Key specifications at a glance

• Part Number: TB340
• Current rating: 40 A
• Poles: 3
• Voltage rating: 240 V

Why this 3-pole TB340 matters for your system

• Three-phase protection: The 3-pole configuration ensures all three phases are disconnected together during a fault, reducing the risk of unstable phase conditions and protecting aligned downstream equipment.
• Balanced circuit safety: A dedicated 40 A rating targets common industrial loads—think motors, pumps, conveyors, and large lighting or climate-control circuits—without over- or under-tripping for typical peak demands.
• Optimal for 240 V distributions: Designed for standard 240 V three-phase systems found in many industrial facilities, making it an effective fit for panel boards and distribution panels.
• Versatile in protection schemes: Suitable for installation in panels that utilize potential transformers and sensing configurations, supporting monitoring and protection strategies in modern industrial control environments.

Ideal use cases

• Protecting 3-phase motors and feeders in manufacturing lines, HVAC systems, and pumping stations
• Distribution panel protection in warehouses, facilities, and processing plants
• Upgrade or replacement in industrial control panels where a reliable 40 A, 3-pole 240 V breaker is required

How it stands up to real-world challenges

• Durable componentry designed for continuous operation in industrial settings, where reliability and predictable protection are critical
• Clear, straightforward compatibility with standard 3-phase electrical architectures, reducing installation complexity
• Consistent performance in panel-mounted applications where space and accessibility matter, helping keep cabinets tidy and maintainable

Practical tips for maximizing value

• Verify that your panel’s busbar and mounting style align with the TB340’s 3-pole footprint to ensure secure, compliant installation.
• Match the 40 A rating to the connected load to prevent nuisance trips while still providing solid protection against overload and short-circuit events.
• If your system uses potential transformers for monitoring, the TB340’s configuration supports integration with protection schemes that rely on accurate phase isolation and fault detection.

Whether you’re outfitting a new industrial control panel or upgrading an existing distribution network, the TB340 40A 3-Pole 240 V circuit breaker offers dependable, straightforward protection for three-phase systems. Its purpose-built design and clear 3-phase operation help you maintain safe, efficient electrical performance across demanding industrial environments.