Siemens 3VA2340-7HN32-0DL0 — 400 A SENTRON MCCB, 3-Pole, Line Protection
The Siemens 3VA2340-7HN32-0DL0 is a SENTRON molded case circuit breaker (MCCB) rated for 400 A continuous current at 40 °C, with a 3-pole configuration and line protection design. It carries a 330 kA breaking capacity at 240 V, stepping down to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 7.5 kA at 690 V — the high interrupting ratings at lower voltages suit it for fault-current-heavy service-entrance or main-breaker positions where upstream coordination demands full-rated SCCR. Thermal derating begins above 55 °C: it holds 400 A through 50 °C, then drops to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. The 98.5 W maximum power loss at full load matters for enclosure heat budgeting — a sealed panel without forced ventilation may need upsizing or a fan. Dimensions are 248 mm high × 138 mm wide × 110 mm deep, fitting standard SENTRON 3VA fixed-mount footprints. The unit includes an undervoltage release (UVR) and a full auxiliary switch complement: two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ configuration). A trip indicator is present.
Integration Notes
The 3VA2340-7HN32-0DL0 mounts into a standard SENTRON panel or enclosure footprint. The UVR coil requires a separate control voltage — verify the undervoltage release rating against your control circuit before wiring. The auxiliary switch set (2+1+1) provides status feedback for PLC or SCADA monitoring without an add-on module.