Square D EGB34030SA Molded Case Circuit Breaker

This breaker is specifically designed for bolt-on installation in Square D NF series panelboards.

The SA suffix signifies that this breaker comes with a factory-installed 120VAC shunt trip accessory. Note that this accessory adds to the physical width of the breaker, requiring four total pole spaces in your panelboard instead of the standard three spaces.

A shunt trip allows the circuit breaker to be tripped open from a remote location by applying a 120VAC control signal to the accessory terminals. This feature is commonly used to tie the branch circuit into fire alarm systems, emergency stop buttons, or automatic equipment shutdown controls.

No, the shunt trip accessory for Square D E-Frame breakers cannot be installed in the field. If your application requires a remote shunt trip, you must purchase the factory-assembled EGB34030SA unit.

EDB, EGB, and EJB models share the exact same E-Frame physical footprint and mount in the same NF panelboards. The difference lies in their maximum interrupting capacity (AIC) at 480Y/277VAC: EDB is rated for 18kA, EGB is rated for 35kA, and EJB is rated for 65kA.

The integral lugs are rated to accept 14 AWG to 6 AWG copper wire, or 12 AWG to 6 AWG aluminum wire.

No, this is a bolt-on branch breaker. It bolts directly to the internal buswork of a Square D NF panelboard and is not compatible with DIN rail enclosures or standard plug-on load centers.

Yes. While its maximum voltage rating is 480Y/277VAC with a 35kAIC interrupting rating, it is also fully rated for 240VAC and 120VAC systems, where it provides a higher interrupting capacity of 65kAIC.

It features a thermal-magnetic trip unit with fixed Long-Time and Instantaneous (LI) functions. The thermal element provides time-delayed protection against sustained overcurrents, while the magnetic element trips instantaneously to clear high-level short circuits.