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 1 pole bolt-on breaker that is rated at 20 A at a system voltage of 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, Switching Duty rated and HACR rated. he breaker has aluminium lugs which have a terminal lug rating of AWG 12...AWG 6 (aluminium) and AWG 14...AWG 6 (copper). This E-frame breaker breaking capacity has been tested a numerous voltages but the capacity is 25 kA at 120 VAC. This device has a hold current of 270 A which is the maxiumum current the breaker can be held to ensure it will trip and a trip current of 875A which is the current value when the breaker is guaranteed to trip. The circuit breaker has a height of 5.66 in, width of 0.98 in and a depth of 4.05 in. This breaker was calibrated for 40 degrees C. This product is UL Listed as Switching duty and High Intensity Discharge. HACR rated.