What the ratings mean for fit
The Siemens SENTRON 3VA1163-3EF36-0CC0 is a 3-pole molded case circuit breaker (MCCB) rated at 63 A continuous current, with a TM240 thermal-magnetic overcurrent release. The 63 A rating holds flat from 40 °C to 50 °C, then derates to 60.48 A at 55 °C and 56.7 A at 70 °C — so in a warm panel you lose about 10 % of the headline figure. The interrupting ratings are 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V; these tell you the fault current it can clear at each voltage level without welding contacts or rupturing the case. The rated insulation voltage is 800 V, which sets the upper bound for the system voltage the breaker can be applied to.
Deployment context
This MCCB mounts in a panel or enclosure — it is not a DIN-rail snap-on device. The 70 mm depth and 76.2 mm width mean it fits standard distribution panel cutouts for 3-pole SENTRON breakers. IP40 on the front protects against tools and wires entering the face, but the back and sides rely on the enclosure's own IP rating. The 2 auxiliary switches (HQ type) provide status feedback to a PLC or indication lamp; the integrated undervoltage release (UVR) trips the breaker when control voltage drops, which is common in emergency-stop chains or mains-loss protection schemes.