HJ Series Also called the following depending on Amperage, HJ 030, HJ060, HJ 100 and HJ 150. The Interrupting Capacity of this type of Circuit Breaker is 65,000 @ 480 Volt and will fit in all Square D I-Line Panelboards old and new. This Circuit Breaker is manufactured from 15 to 150 amp including half sizes 25,35 and 45 Amp