SENTRON 3VA2163-7MS32-0CL0 — 63 A MCCB with starter protection and UVR
The Siemens SENTRON 3VA2163-7MS32-0CL0 is a 3-pole molded case circuit breaker (MCCB) rated at 63 A continuously across the full 40 °C to 70 °C ambient range — no derating needed as the panel warms up. Its 330 kA breaking capacity at 240 V AC handles high-fault utility feeds; the rating steps down to 242 kA at 415/440 V and 187 kA at 500 V, with a sharp drop to 3.7 kA at 690 V, so confirm the available fault current at your service voltage. This MCCB is designed for starter protection — it integrates directly into motor starter assemblies, combining short-circuit and overload protection in one compact footprint. The built-in undervoltage release (UVR) drops the breaker on loss of control voltage, a standard requirement for safety circuits that prevent automatic restart after a power interruption.
Ratings that govern the fit
The 63 A continuous rating is flat from 40 °C to 70 °C, meaning this breaker delivers its full nameplate current even in a hot enclosure — no thermal derating curve to calculate. The 3-pole configuration suits three-phase motor loads, and the 6.5 W maximum power loss is low enough to keep panel heat rise manageable in a dense lineup. Breaking capacity spans 330 kA at 240 V down to 3.7 kA at 690 V. At typical 400 V class distribution voltages (415/440 V) it interrupts 242 kA — sufficient for most industrial service entrances with high transformer capacity. The 690 V figure of 3.7 kA is a secondary winding rating; this breaker is not intended for primary 690 V high-fault applications. The auxiliary switch configuration includes two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type) — enough for remote status indication, trip feedback to a PLC, and separate alarm annunciation without adding external relays.
Panel integration and dimensions
Dimensions are 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures. The 86 mm depth leaves clearance for rear-connected busbars or cable ducts. Operating temperature range spans -25 °C to 70 °C, with storage from -40 °C to 80 °C. The trip indicator provides local visual confirmation of a fault event, aiding rapid troubleshooting on the line.