ABB / General Electric TEY2100 Miniature Circuit Breaker

The TEY2100 is designed for use in GE A-Series lighting panelboards that accept bolt-on branch breakers. It can also be utilized in standalone lug-to-lug applications when paired with a compatible mounting base accessory, such as the TEY3B.

For the integrated load lugs, the manufacturer-recommended tightening torque is 50 inch-pounds for 3 AWG to 1/0 AWG conductors, and 45 inch-pounds for 4 AWG conductors. Proper torque is critical to prevent loose connections and thermal damage.

Yes. If your system requires a higher fault current rating than the 14kAIC at 277/480VAC provided by the standard TEY series, you can upgrade to the TEYF (18kA), TEYD (25kA), TEYH (35kA), or TEYL (65kA) series. These alternatives share the same physical footprint for easy coordination.

The LI designation means the thermal-magnetic trip unit provides Long-Time (L) protection for sustained overloads and Instantaneous (I) protection for short-circuit faults. Both the thermal and magnetic trip thresholds are fixed on the TEY2100 and cannot be adjusted in the field.

Yes, the TEY2100 is rated for up to 250VDC with a 10kA interrupting capacity. It can be safely deployed in DC distribution networks, provided the system parameters align with the UL 489 listing requirements for this specific device.

As a bolt-on circuit breaker, it features mounting tabs that bolt directly to the pre-threaded holes on the panelboard busbar. This direct bolted connection provides superior mechanical stability and lowers contact resistance compared to standard plug-in designs.

Yes. Always disconnect the main power supply to the lighting panelboard and verify the system is de-energized with a calibrated voltage tester prior to seating and bolting the breaker to the busbar. Working on live equipment presents a severe arc flash and shock hazard.