The Siemens SENTRON 3VA1163-1AA36-0BA0 is a 3-pole switch disconnector in a molded-case circuit breaker (MCCB) footprint, rated for 63 A continuous current across the full operating temperature range from 40 °C to 70 °C — no derating needed up to the maximum. It carries an undervoltage release (UVR) for 24 V DC, making it a fit for safety circuits that need to drop the load on control-power loss.
Ratings and what they mean for fit
The 63 A rating is flat from 40 °C to 70 °C — no thermal derating curve to calculate for warm panel environments. That is unusual for a device this compact; most MCCB-style switches start stepping down above 50 °C. The insulation voltage is rated 800 V, with operating voltage up to 690 V AC and 500 V DC, so it handles 480 V and 600 V class systems with headroom. Power loss is 38 W maximum at rated current — relevant for thermal coordination inside a sealed enclosure. The front face carries IP40 protection; the device is intended for panel-mount, not washdown zones. Mechanical service life is 15 000 operating cycles typical, which is adequate for a disconnector used for infrequent isolation rather than daily switching. The undervoltage release (UVR) on 24 V DC means the switch opens automatically when control voltage drops below the dropout threshold — a standard safety interlock pattern.
Integration and mounting
The 3VA1163-1AA36-0BA0 uses front terminal connections for the main circuit, with clamp-type terminals. Dimensions are 70 mm deep, 76.2 mm wide, 130 mm tall — the standard 3VA frame 160 footprint. It mounts in the same panel cutout as other 3VA1 devices, so a panel laid out for a 3VA1110-5EF32-0LA0 MCCB accepts this switch disconnector without rework.