Siemens NSB JXD22B400 Molded Case Circuit Breaker

Siemens Sentron JXD22B400 Molded Case Circuit Breaker is a 2-pole, 400 A MCCB rated for 240 V AC (250 V DC) operation with a 65 kA interrupt rating at 240 V, built on the JXD2 Sentron family’s JD frame for reliable overcurrent protection in power distribution panels. It uses a thermal-magnetic trip mechanism and is designed for freestanding mounting, supporting large feeders with load connections up to 4/0 AWG aluminum or 3/0 AWG copper to 500 kcmil. Suitable for 50/60 Hz service, this unit serves as main feeder protection in industrial or commercial distribution systems and is compatible with heavy-duty feeders in switchgear and panels.