Federal Pacific Electric JL621400 Circuit Breaker

Federal Pacific Electric JL621400 is a 2-pole circuit breaker rated for 400 A at 600 V. It carries a 14 kA interrupt rating, meaning it can safely interrupt fault currents up to 14,000 amperes under defined test conditions. The JL621400 designation identifies a two-pole device, which means both conductors in a circuit are opened simultaneously when a fault is detected. This 2P configuration provides protection for circuits at 600 V by interrupting both hot legs in unison. The component is built to fit in panels and enclosures that accept Federal Pacific Electric circuitry, and the JL621400 part number can be used to verify compatibility with existing breakers or matching panelboards. When replacing or specifying, confirm that the panel accepts a JL621400-type breaker with a 600 V rating and a 14 kA interrupt capability.