The Siemens SENTRON 3VA2063-5KP36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in distribution panels. It carries an ETU850 electronic trip unit — that's the microprocessor-based release that gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves, not a fixed thermal-magnetic response. The 63 A rating holds flat across the entire operating temperature range from -25 °C to 70 °C, so no derating is needed in a warm enclosure.
This breaker's interrupting capacity varies by system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V.
Dimensions are 105 mm wide, 181 mm high, 86 mm deep. The 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame size — it occupies three 35 mm DIN-rail modules worth of panel width.