63 A MCCB with TM220 — what the ratings mean for your panel
The Siemens 3VA1163-5EE32-0AC0 is a 3-pole SENTRON molded case circuit breaker rated for 63 A continuous current at 40 °C ambient, with the same rating holding at 45 °C and 50 °C — no derating needed in a warm enclosure until you cross 55 °C, where it drops to 60.48 A. The TM220 thermal-magnetic release gives fixed thermal and magnetic trip settings; no voltage trigger or undervoltage release here, so it's a straight line-protection device for feeder or branch circuits. Breaking capacity hits 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 690 V — that's serious SCCR headroom for high-fault installations, especially on 240 V or 415 V distribution where you can coordinate downstream without worrying about the main.
Fit and footprint — panel integration
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without surprises. IP40 on the front means it's protected against tools and wires >1 mm, but not against moisture; keep it inside a sealed cabinet if there's washdown nearby. The 2 auxiliary switches (HQ type) are built in, so you get status feedback without adding a separate block — handy for PLC inputs or remote indication.