The Siemens 3VA2110-5HN32-0JC0 is a SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current across the full 40 °C to 70 °C ambient range, meaning no derating curve to manage when the panel runs hot. It is a 3-pole unit designed for line protection — the primary failure mode here is a bolted fault downstream, and this breaker clears it with 187 kA interrupting capacity at 240 V, dropping to 121 kA at 415 V and 3.7 kA at 690 V. That SCCR headroom keeps the upstream gear from seeing the arc.
The breaker occupies 105 mm width, 181 mm height, and 86 mm depth on the DIN rail. That 105 mm width is the critical dimension for multi-pole grouping in a panel — it matches the standard SENTRON 3-pole footprint, so a panel laid out for a 3VA2163 frame will accept this unit without shifting gland plates or re-drilling mounting holes. The shunt trip (STL) release and two auxiliary switches (HQ) are factory-integrated, saving a wiring pass during commissioning.