General Electrics TEY320ST12 - 20 A, 3-Pole Bolt-On Circuit Breaker | AmpState

Meet the General Electrics TEY320ST12, a reliable 3-pole, 20 Amp bolt-on molded case circuit breaker designed to safeguard your electrical system with precision. Built for dependable branch-circuit overcurrent and short-circuit protection in panelboards and loadcenters, this unit is a smart choice for residential, commercial, and light industrial installations.

Why this TEY320ST12 stands out

• Secure bolt-on mounting delivers a rigid, vibration-resistant connection to the bus, minimizing movement and maintaining consistent protection.
• Thermal-magnetic trip unit provides stable, repeatable protection by responding to both thermal heat changes and magnetic short-circuit events, ensuring fast, reliable interruption when needed.
• OEM-compatible design is tuned for seamless integration with matching General Electrics load centers and panelboards, simplifying upgrades and replacements.
• 3-pole, 20A configuration supports three-phase or multi-wire installations common in commercial and light industrial environments, with clear labeling for straightforward wiring and troubleshooting.

Technical snapshot

Manufacturer: General Electrics

Part number: TEY320ST12

Type: Thermal-magnetic molded case circuit breaker

Amperage rating: 20 A

Number of poles: 3

Mounting style: Bolt-on

Applications: Branch circuit overcurrent and short-circuit protection in panelboards and loadcenters

Who should consider the TEY320ST12?

Electricians, panel builders, facilities managers, and electrical contractors will value its robust construction and compatibility. It’s an ideal choice for service entrances in small to mid-size commercial spaces, equipment rooms with motor loads, and any installation requiring reliable 3-pole protection.

Practical tips for installation and use

• Follow torque specifications during bolt-on mounting to ensure a secure bus connection and consistent trip performance.
• Pair with GE OEM load centers to guarantee proper fit, alignment of trip curves, and streamlined installation.
• Use in circuits requiring 3-phase protection, such as small motors, lighting panels, or three-phase distribution blocks.
• Keep a spare TEY320ST12 on hand as part of a maintenance kit to minimize downtime during panel service or upgrades.

Choosing the right circuit breaker for your panel

For safe operation and code-compliant protection, match the TEY320ST12’s thermal-magnetic molded case design with the same amperage and pole count as your panelboard or load center. The 3-pole, 20A specification is a precise fit for many General Electrics panels and compatible OEM systems, delivering dependable interruption performance without compromising wiring clarity or space.