What this MCCB carries — and where it fits
The Siemens 3VM1163-5EE32-0AA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated 63 A continuous at 40 °C, with a TM220 thermal-magnetic trip unit. It's designed for line protection — meaning it sits on the feeder side of a panel, not on a motor branch. The interrupting ratings climb to 187 kA at 240 V AC and still hold 121 kA at 415 V, so it handles high-fault utility feeds without cascading upstream. The 70 mm depth and 76.2 mm width keep it within a standard MCCB footprint for retrofit into existing SENTRON or 3VA-based switchboards.
Thermal derating — what the 63 A nameplate actually means
The 63 A rating holds flat from 40 °C to 50 °C, then drops to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. That's a 5 A loss over a 30 °C rise — typical for a TM220 release. If your enclosure runs hot (say 55 °C internal ambient), you're still good for 62 A continuous. The 17 W maximum power loss at rated load is manageable for a 3-pole frame this size; just don't stack it against heat-sensitive components without a 10 mm air gap.
Panel integration notes
Mounts on a DIN rail or direct panel — the 130 mm height and 70 mm depth clear most standard gland plates. IP40 on the front face means it's splash-protected from the front but not sealed for washdown; keep it inside the enclosure. The TM220 release is fixed (no interchangeable trip unit), so verify the 63 A continuous rating against your load before committing. No undervoltage release, no ground-fault monitoring, no communication function — this is a straight thermal-magnetic breaker, not a smart device.