The 3VA1063-4ED36-0AF0 is a 3-pole SENTRON molded case circuit breaker rated 63 A continuous at 40 °C — that's the full-rated current without derating up to 50 °C, where it still holds 63 A. Above that, it steps down: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. The interrupting ratings tell you where this breaker can clear a fault without welding or rupturing: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 690 V. That keeps the part simple and reliable for standard feeder protection, but it's not the right choice if you need adjustable long-time or short-time pickup curves.
Dimensions are 76.2 mm wide by 130 mm high by 70 mm deep — the width is a standard 3-pole MCCB footprint, so it drops into existing SENTRON or 3VA-series cutouts without panel rework. That gives you a Form-C contact for status feedback and a separate contact that closes only on a trip event — useful for remote annunciation or PLC inputs without adding external relays.