What it is and what the ratings mean
The Siemens SENTRON 3VA1163-5EE32-0DA0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, with a TM220 thermal-magnetic release and an integrated undervoltage release (UVR). Its continuous current rating Iu is 63 A at ambient temperatures up to 50 °C; above that it derates to 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C — so if your panel runs hot, you lose about 10 % of the headroom by 70 °C. The interrupting ratings are the headline: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V. That 187 kA at 240 V means it can safely clear a fault of that magnitude without welding contacts or rupturing the case — critical for high-fault-capacity distribution boards where upstream transformers can dump serious current. The rated insulation voltage Ui is 800 V, so it's comfortable on 690 V systems with margin.
Panel integration and wiring notes
The breaker measures 76.2 mm wide, 130 mm high, and 70 mm deep — a standard 3-pole MCCB footprint for DIN-rail or screw-mount panels. The front face is IP40, so it's protected against tools and wires but not washdown; keep it inside a sealed enclosure if the environment is wet. The TM220 release is fixed thermal-magnetic (no electronic adjustment), and there's no auxiliary contact or communication module on this variant — if you need remote status, you'll add the separate 3VA9608-0BB25 auxiliary trip block. The undervoltage release is built in, so verify your control voltage matches the coil rating before energizing.