The Siemens SENTRON 3VA2163-6HN32-0BA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C up to 70 °C — no derating needed in a warm enclosure. It carries a 242 kA interrupting rating at 240 V, stepping down to 187 kA at 415/440 V, 121 kA at 500 V, and 3.7 kA at 690 V.
What the ratings mean for the panel
The 63 A frame holds its rating at every 5 °C step from 40 °C to 70 °C — a flat thermal curve that simplifies sizing in a packed cabinet where ambient runs high. The 242 kA at 240 V is the headline SCCR; the real-world number to coordinate downstream is the 187 kA at 415 V, which is the common industrial distribution voltage. At 690 V the interrupting capacity drops to 3.7 kA, so this breaker is not the right choice for 690 V line-side protection unless the available fault current is well below that figure. The built-in undervoltage release (UVR) trips the breaker when control voltage drops below a threshold — standard for safety circuits that need to drop power on loss of the hold-in signal. No auxiliary switch is fitted on this variant, so if you need remote status feedback, you will add one externally.
Panel fit and integration
Footprint is 105 mm wide by 181 mm tall by 86 mm deep — that is 4.13 in × 7.13 in × 3.39 in. It mounts on a DIN rail or directly to a backplate via the standard MCCB screw pattern. The 3-pole block takes up the same width as a typical 3-pole frame in this class; plan the enclosure layout with the 105 mm width in mind for busbar and cable entry clearance. Maximum power dissipation is 6.5 W — negligible for thermal budgeting in a ventilated enclosure, but worth noting if the panel is sealed and densely packed.