General Electric | TEY3020ST12 | Circuit Breaker | 20A | 3-Pole | 480V

General Electric TEY3020ST12 is a purpose-built 20 amp, 3-pole circuit breaker designed for 480V three-phase systems. Built to protect demanding industrial and commercial electrical networks, this GE device provides reliable overcurrent protection where uptime and safety matter most. Designed for maintenance, retrofit, and replacement projects, the TEY3020ST12 offers a precise fit and consistent performance in panels that require GE’s TEY-style protection. When your system runs on 480V three-phase power, this 20A breaker helps prevent equipment damage, minimize downtime, and keep critical loads like motors, pumps, and conveyors safe from overloads. Key specifications

• Amperage: 20 A
• Poles: 3-Pole
• Voltage: 480 V
• Part number: TEY3020ST12
• Notes: Confirm fit and ratings before ordering. The part number is the best reference for compatibility.

Why this design matters

This TEY series device is engineered to align with three-phase, 480V electrical environments, delivering predictable trip characteristics that align with upstream protection and downstream equipment. Using the exact part reference TEY3020ST12 minimizes coordination issues and reduces the risk of mismatched breakers in GE panels, which can otherwise lead to unreliable protection or unexpected trips.

Ideal use cases

• New installations in facilities powered by 480V three-phase systems where a 20A, 3-pole protection device is required.
• Retrofits and panel upgrades in manufacturing lines, HVAC systems, conveyors, and pump stations where GE-compatible protection is essential.
• Replacement for worn or failed GE breakers in service panels that specify TEY-style devices to maintain original protection characteristics.

Fit, compatibility, and installation notes

Before ordering, verify that your panel or enclosure expects a 3-pole, 480V GE TEY-type device and that the TEY3020ST12 matches the required amperage and pole configuration. The part number TEY3020ST12 is the most reliable reference for compatibility. Follow standard electrical safety practices during installation, including de-energizing the circuit, verifying ratings, and securing the device according to panel manufacturer guidelines.

Who should consider this part

Facility engineers, electricians, and maintenance technicians responsible for industrial panels, data-center auxiliary power, or large commercial equipment will find the TEY3020ST12 a precise, reliable replacement that preserves original protection schemes and panel coordination. Its OEM design supports long-term reliability in demanding environments where 480V three-phase power is the norm.