63 A MCCB with full thermal-magnetic curve for motor circuits
The Siemens SENTRON 3VA2163-7MN32-0KC0 is a 3-pole molded case circuit breaker rated 63 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting in a crowded enclosure. The interrupting rating hits 330 kA at 240 V, dropping to 242 kA at 415/440 V and 187 kA at 500 V; at 690 V it holds 3.7 kA. That SCCR headroom at typical distribution voltages means it coordinates cleanly upstream of a motor starter without forcing a larger frame.
The base switch variant is 3VA2163-7MN32-0AA0; this order code adds the factory-installed shunt trip and two HQ aux switches, so no field wiring of add-on modules is required. Maximum power loss is 4 W.
Trip unit and protection functions
The breaker includes phase failure detection and a voltage trigger. It does not carry an undervoltage release or ground-fault monitoring, and there is no communication function or trip indicator on this variant. The shunt trip (STL) allows remote tripping from a safety circuit or emergency-stop chain. Minimum trip delay is 4 s, maximum 17 s — adjust the thermal-magnetic curve within that window to coordinate with downstream motor starters.