What it is and what it does
The Siemens 3VA2063-5KP32-0DH0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for 63 A continuous current with a 3-pole line-protection configuration. Its ETU850 electronic trip unit provides adjustable overload and short-circuit protection curves, plus communication capability for integration into a monitored distribution system. Breaking capacity hits 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 3.4 kA at 690 V — numbers that tell you this breaker handles high-fault utility feeds and transformer secondaries without cascading upstream. The 63 A rating holds flat from 40 °C through 50 °C, then derates to 53.55 A at 70 °C ambient. An undervoltage release (UVR) is built in, and the auxiliary contact block carries two auxiliary switches plus one trip-alarm switch (HQ version). Communication function is present, so this breaker can report status and trip events over a bus — useful for a plant-wide power monitoring scheme.
Sourcing and lifecycle
The integrated auxiliary trip (3VA9608-0BB25) and the supplied basic switch (3VA2063-5KP32-0AA0) are specific to this variant; if you're holding spares for a panel built around this order code, those sub-components are what you'd order alongside it.
Panel fit and integration
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that drops into a SENTRON distribution board or a separate enclosure with DIN-rail or screw-mount provisions. The 7.9 W maximum power loss means ventilation is minimal; no forced cooling needed in a typical IP54 cabinet. Operating temperature range is -25 °C to 70 °C, storage from -40 °C to 80 °C. That covers most indoor industrial environments, including unheated warehouses and roof-mounted enclosures in temperate climates.