Siemens SENTRON 3VM1163-3EE42-0AA0 — 63 A, 4-Pole MCCB with TM220 Release
The Siemens SENTRON 3VM1163-3EE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying 63 A continuously at 40 °C and interrupting up to 76 kA at 240 V AC. The TM220 thermal-magnetic trip unit gives it a fixed time-delay curve suited for feeder and main distribution panels — no field-adjustable trip settings, so it's a straight swap-in for a pre-coordinated design. The breaking capacity drops predictably as voltage rises: 53 kA at 415 V, 32 kA at 440 V, and 12 kA at 500 V. Power loss is 17 W maximum — modest for a 63 A frame, so ventilation in a crowded enclosure is manageable. Ambient temperature derating starts at 55 °C: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C.
It's a plain thermal-magnetic MCCB — wire it in, torque the terminals to spec, and it protects. The TM220 release is fixed, so coordination studies should treat the trip curve as a given, not adjustable.