The Siemens SENTRON 3VA2063-7KP42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. It carries an ETU850 electronic trip unit, which gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves. The interrupting ratings are substantial: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3 kA at 690 V. That kind of fault-clearing capacity means it can serve as a main or feeder breaker in high-fault panels without cascading upstream.
What the Ratings Mean for Fit
The 63 A continuous rating is flat from 40 °C to 70 °C ambient — no thermal derating curve to calculate. That simplifies panel design in warm enclosures or near other heat sources. The ETU850 electronic release is programmable, so you can shape the trip curve to coordinate with downstream breakers or fuses. The 800 V rated insulation voltage (Ui) covers most industrial distribution voltages up to 690 V phase-to-phase. IP40 on the front means it's protected against solid objects larger than 1 mm but not sealed against moisture — keep it in a dry indoor panel.
Panel Integration
Dimensions are 86 mm deep, 140 mm wide, and 181 mm high. It's a standard MCCB footprint for a 4-pole frame — mounts on a DIN rail or directly to a backplate with the supplied hardware. The communication function (listed as Yes) means it can interface with a higher-level system for monitoring or remote trip indication, though the exact protocol depends on the communication module you pair with it. No undervoltage release or ground-fault monitoring is built in; those are external accessories if needed.