GE TEY340ST12 - 40 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState

GE TEY340ST12 is a 40A, 480V, 3-pole bolt-on molded case circuit breaker engineered to protect branch circuits in panelboards and loadcenters with dependable performance. Designed for commercial and light-industrial environments, this device delivers a robust, vibration-resistant connection and precise protection when it matters most.

Why this breaker stands out

• Secure bolt-on mounting provides a rigid, vibration-resistant bus connection, minimizing loosened contacts and ensuring consistent electrical performance in demanding installations.
• Thermal-magnetic trip unit delivers stable, repeatable protection—responding quickly to short circuits while preventing nuisance trips from normal load variations.
• OEM-compatible design is intended for use with matching manufacturer loadcenters and panelboards, simplifying replacement and maintenance projects.
• 3-pole configuration for 480V systems supports three-phase distribution, ideal for commercial equipment, motors, and HVAC circuits.

What problems it solves

In busy electrical rooms, loose connections can lead to overheating and unpredictable trips. The bolt-on construction of the GE TEY340ST12 minimizes that risk by delivering a solid mechanical bond to the panel’s bus bars. The integrated thermal-magnetic trip unit provides reliable fault detection for both overload and short circuits, helping protect wiring, devices, and downstream equipment from damage in panelboards and loadcenters.

Ideal applications

This breaker is well-suited for:

• Commercial electrical panels and industrial control panels powered by 480V three-phase systems
• Motor feeders, HVAC equipment, and lighting distribution circuits
• Renovation or upgrade projects where OEM-matched panel components are preferred for reliability and service life

Specifications at a glance

• Brand: GE
• Part Number: TEY340ST12
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 40A
• Voltage Rating: 480V
• Poles: 3
• Mounting Style: Bolt-on
• Application: Branch circuit overcurrent and short-circuit protection

Practical tips for installation and maintenance

For best results, pair this GE TEY340ST12 with a compatible OEM panelboard to ensure coordinated trip characteristics. Verify panel ratings align with a 480V three-phase supply, and maintain clean, dry enclosures to preserve the integrity of the bolt-on connection. When replacing an existing breaker, preserve the original alignment to avoid bus-bar bending and ensure a tight, secure fit.

Why choose this solution over alternatives

The combination of bolt-on mounting and a thermal-magnetic trip system makes this breaker a reliable choice for installations where mechanical stability and precise protection are critical. Its compatibility with OEM panels reduces replacement complexity, while the 3-pole, 480V rating covers a wide range of commercial and light-industrial applications—delivering consistent protection without the guesswork often associated with non-matching components.