What it is and what it does
The Siemens 3VA2340-7HL32-0JA0 is a SENTRON molded case circuit breaker (MCCB) rated for 400 A continuous current in a 3-pole configuration, designed for line protection in industrial power distribution panels. Its interrupting capacity reaches 330 kA at 240 V AC, 242 kA at 415/440 V, 187 kA at 500 V, and 7.5 kA at 690 V — so it handles high-fault scenarios typical of large transformer-fed switchboards or motor control centers without cascading upstream. Thermal derating is published from 40 °C to 70 °C: the breaker holds full 400 A up to 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 — essential for sizing in warm enclosures or near heat sources.
Integration and mounting
The breaker measures 110 mm deep, 138 mm wide, and 248 mm tall — fits standard MCCB panel cutouts and busbar spacing for 3-pole 400 A frames. It includes a factory-installed shunt trip (STL) release for remote tripping via a control voltage, but no auxiliary switch or ground-fault module — those are add-on options if needed.
Lifecycle and sourcing
The base switch variant is 3VA2340-7HL32-0AA0; the -0JA0 suffix adds the shunt trip. Sourced and quoted to order against an RFQ through independent distribution.