The Siemens SENTRON 3VA2163-5HL32-0AF0 is a 3-pole molded case circuit breaker rated for 63 A continuous current (Iu) at 40 °C, with an ETU320 electronic trip unit providing adjustable overload and short-circuit protection for line-feeder or main-switch applications. Its interrupting capacity reaches 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V — figures that cover most industrial fault-current scenarios without cascading upstream breakers.
Thermal derating and endurance
Above that, current must be derated: 60.6375 A at 55 °C, 58.275 A at 60 °C, 55.9125 A at 65 °C, and 53.55 A at 70 °C. Latching endurance is rated at 20 000 operations, and maximum power loss is 4 W.