Siemens SENTRON 3VA2163-6HL36-0AH0 — 63 A MCCB, Line Protection, 3-Pole
It carries a maximum breaking capacity of 242 kA at 240 VAC, dropping to 187 kA at 415/440 VAC, 121 kA at 500 VAC, and 3.7 kA at 690 VAC — the voltage-dependent curve governs where it can be applied as a main or feeder breaker.
Breaking Capacity and Application Context
At 415/440 V the rating is still 187 kA, which covers most industrial low-voltage distribution. The 63 A continuous rating is the load current it can carry indefinitely without tripping. Because it holds at 70 °C ambient, it suits high-density switchgear where internal temperatures rise. The 3-pole design handles three-phase loads (motors, transformers, feeders) and the line-protection characteristic (not motor-protection) means it trips on overcurrent without the inverse-time curve shaped for motor inrush — use it for cable and busbar protection, not direct motor starting.