What this MCCB does for your line
The Siemens SENTRON 3VA2163-6HN36-0KL0 is a 3-pole molded case circuit breaker rated for 63 A continuous current (Iu) with an ETU350 electronic overcurrent release. It carries 242 kA breaking capacity at 240 V, dropping to 187 kA at 415 V and 440 V, then 121 kA at 500 V — still 5 kA at 690 V. That means it clears high-fault scenarios downstream of a large transformer or bus riser without cascading upstream breakers. The ETU350 release gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves — not a fixed thermal-magnetic. For a molding cell or conveyor line where you need to coordinate with downstream motor starters and avoid nuisance trips on inrush, that adjustability is the difference between a clean trip and a line-down event.
Panel fit and wiring
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard SENTRON 3VA2 footprint. It mounts on a DIN rail or directly to a backplate via the screw terminals. Auxiliary contact configuration ships as 2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ. That gives you separate dry contacts for remote status, trip indication, and a dedicated alarm — no need to add a separate signal block for most panels. The shunt trip release (STL) is integrated as the auxiliary release design — wired separately, it lets a remote E-stop or PLC output trip the breaker without a mechanical linkage.
Thermal derating — what the numbers mean
Rated continuous current holds at 63 A from 40 °C up to 50 °C ambient. At 55 °C it derates to 60.6 A, at 60 °C to 58.3 A, at 65 °C to 55.9 A, and at 70 °C to 53.6 A. If your panel ambient runs above 50 °C — common in a non-vented enclosure near a press or oven — size the load side for the derated value, not the nameplate 63 A. Maximum operating temperature is 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling and warehousing, not running conditions.