The Siemens 3VA2163-7MS32-0DA0 is a SENTRON molded case circuit breaker (MCCB) designed for starter protection — meaning it is sized to protect motor starters and their branch circuits, not just general distribution. It carries a full-rated 63 A continuously from 40 °C through 70 °C ambient (no derating needed across that span), which simplifies panel layout in warm enclosures. The 3-pole unit includes an undervoltage release (UVR) that trips the breaker when control voltage drops, a common requirement for safety circuits that must drop out on loss of control power.
Breaking capacity and selectivity
The interrupting rating is the headline number: 330 kA at 240 V, 242 kA at 415/440 V, 187 kA at 500 V, and 3.7 kA at 690 V. At the common 415 V industrial level, 242 kA means this breaker can be placed at a main or feeder position ahead of a high-fault transformer without needing a current-limiting fuse upstream — it clears faults up to that level on its own. The sharp drop to 3.7 kA at 690 V is typical for a 63 A frame; at that voltage the breaker is limited to light-duty or resistive loads.
Physical fit and integration
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. The 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame — it occupies three 35 mm DIN module positions. The 86 mm depth includes the handle and terminal clearance; panel depth should allow at least 100 mm behind the door for wiring. The design includes an undervoltage release (UVR) as the auxiliary release; no auxiliary switch is fitted, so remote status indication requires an add-on module.