ABB / General Electric TEYF380 Miniature Circuit Breaker

The TEYF380 is a bolt-on miniature circuit breaker designed specifically for use in GE A-Series lighting panelboards.

The primary difference is the short-circuit interrupting rating at 480Y/277VAC. The standard TEY380 is rated at 14kAIC, while the TEYF380 features a higher interrupting capacity of 18kAIC at the same voltage.

Yes, the TEYF380 is rated for 250VDC applications with an interrupting capacity of 10kAIC.

The factory installed lugs on the TEYF380 accept 4 AWG to 1/0 AWG copper (Cu) or aluminum (Al) conductors.

For 4 AWG wire, the recommended lug torque is 45 in-lb. For 3 AWG through 1/0 AWG wire, the recommended torque is 50 in-lb.

It is a bolt-on circuit breaker that secures directly to the bus of compatible GE A-Series panelboards, providing a rigid and reliable connection.

The LI designation indicates that the thermal magnetic trip unit provides Long-Time (L) overload protection and Instantaneous (I) short-circuit protection. Both settings are fixed on this breaker frame.

Yes. If your system requires a higher short-circuit rating at 480Y/277VAC, you can upgrade to the TEYD380 (25kAIC), TEYH380 (35kAIC), or TEYL380 (65kAIC). These breakers share the same physical footprint and fit the same GE A-Series panelboards.

ABB acquired GE Industrial Solutions, so this breaker may be branded as either ABB or General Electric depending on the manufacturing date. The form, fit, and function remain identical regardless of the label.