Square D by Schneider Electric EJB34030 is a three-pole, 30-amp miniature circuit breaker for 480Y/277V three-phase power. An E‑Frame bolt-on device with thermal-magnetic trip, it accepts 14–2/0 AWG aluminum or copper conductors and provides up to 65 kA interrupting capacity at 480Y/277 VAC. It’s designed for use in NF panelboards and HID lighting circuits, delivering reliable overcurrent protection in commercial electrical distributions.
