The Siemens SENTRON 3VA2163-5HL32-0DH0 is a 3-pole molded case circuit breaker rated 63 A continuous current at 40 °C, with an ETU320 electronic trip unit configured for line protection. The 187 kA breaking capacity at 240 V and 121 kA at 415 V means it can safely interrupt high-fault currents on the secondary side of a distribution transformer or at a main panelboard — the kind of fault level you see near a utility service entrance. At 690 V the rating drops to 4.25 kA, so this breaker is sized for low-voltage distribution, not 690 V motor circuits.
The 63 A rating holds flat up to 50 °C; above that it derates to 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. If the breaker lives in a crowded enclosure with other heat sources, use the 60 °C column for continuous-load sizing — the 58.275 A figure is the practical limit for a 63 A feeder in a warm panel. The 86 mm depth, 105 mm width, and 181 mm height fit the standard SENTRON 3VA frame footprint; it mounts on a DIN rail or screws directly to a backplate.
Auxiliary and trip configuration
The UVR drops the breaker if control voltage falls below the dropout threshold — standard for emergency-stop or undervoltage protection schemes. The trip alarm switch signals a fault condition independently of the aux contacts, which is useful for remote SCADA alarming. The basic switch module is order code 3VA2163-5HL32-0AA0; the integrated auxiliary trip module is 3VA9608-0BB25.