E-Frame Breaker are Lighting Panelboard Circuit breakers that are proven effective and reliable which provide a wide variety or robust features that are use specifically in Square D NF Panelboards. This device is a 3 pole bolt-on breaker that is rated at 50 A at a system voltage of 480Y/277 VAC and the breaker is UL Listed as well as CSA rated. This E-Frame breaker has thermal-magnetic trip unit as well as signal indicator that will indicate when a trip has occur. This specific breaker is HID rated and HACR rated. The breaker has aluminium lugs which have a terminal lug rating of AWG 12...AWG 2/0 (aluminium) and AWG 14...AWG 2/0 (copper). This E-frame breaker breaking capacity has been tested a numerous voltages but at two voltages the capacity is 65 kA at 480Y/277 VAC and 100 kA at 120/240 VAC. This device has a hold current of 630 A which is the maxiumum current the breaker can be held to ensure it will trip and a trip current of 1800A which is the current value when the breaker is guaranteed to trip. The circuit breaker has a height of 5.66 in, width of 2.94 in and a depth of 4.05 in. This breaker was calibrated for 40 degrees C. This product is UL Listed as High Intensity Discharge. HACR rated.