What this MCCB carries and where it fits
The Siemens SENTRON 3VA1063-2ED42-0BH0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, with a continuous current of 63 A at 40 °C and a breaking capacity of 52.5 kA at 240 V, tapering to 32 kA at 415 V and 7.5 kA at 690 V. That 52.5 kA at 240 V means it can safely interrupt a fault current up to that level on a 240 V line without cascading upstream — critical for high-fault panels near transformers or large motor banks. The 63 A rating holds flat from 40 °C to 50 °C, then derates to 58 A at 70 °C; if your panel ambient runs above 50 °C, size the load accordingly. The 800 V rated insulation voltage confirms it is built for 690 V systems with margin.
Integrated auxiliary and undervoltage release
This breaker ships with an undervoltage release (UVR) fitted and a factory-installed auxiliary switch block carrying 2 auxiliary switches plus 1 trip alarm switch HQ. The UVR trips the breaker when control voltage drops below the dropout threshold — standard for emergency-stop chains or undervoltage protection schemes. The auxiliary contacts give remote status feedback (open/closed/tripped) to a PLC or SCADA input. The basic switch assembly is orderable as 3VA10632ED420AA0 if you ever need a replacement subassembly. No communication module is fitted; this is a pure protection and signalling device.