What this MCCB is and what it does
The Siemens SENTRON 3VA2163-7HN32-0KL0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection — meaning it sits at the feeder or main distribution point, not on a motor branch. It carries 63 A continuous at 40 °C through 70 °C without derating, so it holds its rating across a wide panel ambient. The interrupting capacity is the headline number here: 330 kA at 240 VAC, 242 kA at 415/440 VAC, and still 187 kA at 500 VAC. That puts it in the high-interrupting class for industrial switchgear where fault currents are substantial. At 690 VAC the interrupting capacity drops to 3.7 kA — that's a different application envelope; if your system runs 690 V, verify the available fault current is under that limit. The breaker includes a shunt trip release (STL) and a complement of auxiliary switches: 2 auxiliary + 1 trip alarm + 1 electrical alarm switch (HQ configuration). That gives you remote status and trip indication without an add-on module.
Panel fit and dimensions
The 3VA2163-7HN32-0KL0 measures 105 mm wide × 181 mm high × 86 mm deep. That 86 mm depth (3.39 in) is the dimension to check against enclosure depth and busbar clearance — it's a standard SENTRON 3VA frame size, so it fits the same mounting footprint as other 3VA 3-pole breakers in the range. The 105 mm width (4.13 in) per pole is typical for this class; three poles plus neutral accessory space is already accounted for in the housing.
What the auxiliary configuration means for integration
The built-in auxiliary switch set (2 aux + trip alarm + electrical alarm) eliminates the need for a separate accessory purchase if you need remote indication of breaker position and trip events. The shunt trip (STL) allows remote tripping via a control signal — common in emergency-stop circuits or supervisory shutdown sequences. No undervoltage release is fitted on this variant, so if you need UVR for undervoltage protection, that's a different order code.