63 A MCCB with undervoltage release and high interrupting capacity
The Siemens 3VA2163-5HN32-0BL0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across its full ambient temperature range from 40 °C to 70 °C — no derating needed up to 70 °C, which simplifies panel design in warm enclosures. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — the 240 V figure covers most North American distribution panels, while the 415 V rating handles European 400 V line-to-line faults cleanly. It carries an undervoltage release (UVR) as the auxiliary release, plus a 2+1+1 auxiliary switch configuration: two auxiliary switches, one trip alarm switch, and one electrical alarm switch HQ, giving the panel builder feedback on breaker state and fault events without extra modules.
Integration and dimensions
Dimensions are 181 mm high, 105 mm wide, and 86 mm deep — the 105 mm width fits standard MCCB panel cutouts, and the 86 mm depth leaves room for rear bus connections in a typical distribution enclosure. Rated for line protection (not motor protection), so it is sized for feeder or branch-circuit overcurrent protection rather than overload-only duty on a motor starter.
Key ratings and what they mean for fit
The 63 A rating is the continuous current at any ambient from 40 °C to 70 °C — no temperature derating curve to calculate, which is unusual for an MCCB and saves panel design time in hot environments like enclosed switchgear or near furnace lines. Maximum power loss is 6.5 W per pole at rated current — low enough that internal cabinet heating from the breaker itself is negligible in most enclosures, but worth checking if the panel is densely packed with multiple breakers. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C — the storage range exceeds the operating range, meaning the breaker can sit in a cold warehouse or hot truck without damage, but must be within the narrower band when carrying current.