Siemens JXD23B400 Molded Case Circuit Breaker

Siemens JXD23B400 is a Sentron series low-voltage molded‑case circuit breaker rated for 400 amperes at 240 VAC in a 3-pole configuration, designed for protection of heavy electrical feeders in commercial and industrial panels. It carries a 65 kA interrupt rating at 240 V AC and uses a thermal-magnetic trip mechanism within the JXD2 family to respond to overloads and short circuits. This model is a complete molded-case breaker with a non-interchangeable trip unit, and lugs are not included in this configuration. The catalog number JXD23B400 identifies a 3-pole, 400 A, 240 V AC, 65 kA interrupt capacity, part of Siemens’ Sentron low-voltage line.