The Siemens 3VA2163-7MN36-0DH0 is a SENTRON molded case circuit breaker (MCCB) in a motor protection configuration, rated for 63 A continuous current and carrying a 330 kA interrupting capacity at 240 V. Three-pole design, fitted with an ETU350M electronic trip unit that includes phase failure detection.
Rated continuous current Iu is 63 A, and it holds that rating from 40 °C through 50 °C — no derating needed in a typical ventilated enclosure. At 55 °C it still carries 60.48 A, and at 70 °C (the maximum operating ambient) it delivers 56.7 A. The rated insulation voltage Ui is 800 V, so the breaker is suitable for 480 V and 600 V class systems with headroom. Interrupting ratings span the common distribution voltages: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 52.5 kA at 690 V. For a 480 V panel, the 242 kA figure at 440 V is the closest published value — well above typical available fault current in most industrial switchboards. Physical footprint: 105 mm wide, 181 mm high, 86 mm deep. Maximum power loss is 75 W — relevant for thermal calculations inside a sealed enclosure. Mechanical endurance is 20,000 operations, which is typical for a motor-protection MCCB that sees occasional switching rather than daily cycling.