The Siemens SENTRON 3VA2063-5KP32-0KC0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying a rated continuous current Iu of 63 A and an interrupting capacity of 187 kA at 240 V, 121 kA at 415 V, and 79 kA at 500 V — numbers that define its fault-clearing capability across common distribution voltages. Equipped with the ETU850 electronic trip unit, it provides adjustable protection curves and includes a communication function for integration into higher-level monitoring systems — a feature that moves this MCCB beyond basic thermal-magnetic breakers into managed power distribution.
The 63 A rating holds at ambient temperatures up to 50 °C; above that, the continuous current derates linearly to 53.55 A at 70 °C — a curve the panel designer must account for when loading the breaker near its nameplate in a warm enclosure. Dimensions of 105 mm wide by 181 mm high by 86 mm deep place it in the standard 3-pole MCCB footprint for DIN-rail or screw-mount panel integration; the 86 mm depth leaves clearance for rear-connected busbars in a typical switchboard. Maximum power loss of 5.4 W is low enough that ventilation requirements are minimal in a well-sized enclosure, but the 70 °C maximum operating ambient still governs the thermal budget — verify the internal panel temperature under full-load conditions.
Auxiliary functions and release options
The breaker includes a shunt trip (STL) for remote opening and two HQ auxiliary switches for status feedback — enough to signal the breaker state to a PLC or SCADA system without an external contact block. It does not carry an undervoltage release, ground fault monitoring, or phase failure detection; those functions must be added externally if the application requires them.
Environmental and endurance ratings
Mechanical endurance is rated at 20,000 cycles.