Square D EGB34090SA Miniature Circuit Breaker

The "SA" suffix indicates that this breaker includes a factory-installed 120VAC shunt trip. This accessory allows the breaker to be tripped remotely using an external control signal, which is commonly used for emergency power-off (EPO) systems or automation control.

No. Electrical accessories for Square D E-frame breakers, including the 120VAC shunt trip, are factory-installed only. If your application requires remote tripping capabilities, you must purchase a model with the "SA" suffix like the EGB34090SA.

Although the EGB34090SA is a 3-pole breaker, the factory-installed shunt trip accessory requires an additional pole space. As a result, this breaker will occupy a total of 4 pole spaces in your Square D NF panelboard.

No. Square D E-frame breakers, including the EGB34090SA, are specifically designed for bolt-on installation in NF series panelboards. They will not fit in NQ, QO, or Homeline panels.

No. The EGB34090SA has a slash voltage rating of 480Y/277VAC. Slash-rated breakers are only suitable for solidly grounded Wye systems where the line-to-ground voltage does not exceed 277V. They cannot be used on 480V ungrounded or corner-grounded Delta systems.

The difference lies in their interrupting ratings (AIC) at 480Y/277VAC. The EDB34090SA is rated for 18kAIC, the EGB34090SA is rated for 35kAIC, and the EJB34090SA is rated for 65kAIC. All three are 90A, 3-pole E-frame breakers with a factory-installed 120VAC shunt trip and share the same physical dimensions and panel compatibility.

The "LI" code indicates that the breaker's thermal-magnetic trip unit provides Long-Time (L) and Instantaneous (I) protection. The long-time function protects against sustained overloads, while the instantaneous function trips the breaker immediately in the event of a short circuit.

Yes, this breaker is HACR rated. This means it has been tested and approved for use with heating, air conditioning, and refrigeration equipment, providing the necessary protection for motor-driven compressor loads.

Yes. Like most Square D molded case circuit breakers, the EGB34090SA includes a Visi-Trip visual indicator. When the breaker trips, the handle snaps to a midpoint position and a highly visible red indicator appears, making it easy to identify the tripped breaker in a crowded panel.

Yes, the breaker can be locked out for safety during maintenance. You will need to install a handle padlock attachment, such as the Square D HPAFD, which allows the breaker handle to be secured in the OFF position in compliance with lockout/tagout (LOTO) procedures.