The Siemens SENTRON 3VA1163-4EE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous at 40 °C, with the TM220 thermal-magnetic trip unit handling overload and short-circuit protection. It is designed for line protection — the primary feeder or distribution breaker in a panel — not for motor starter duty or ground-fault monitoring. Breaking capacity is the headline: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
The 4-pole width (101.6 mm) is standard for a 4-pole MCCB in this frame size; verify the existing panel cutout if replacing a different brand. The TM220 trip is a fixed thermal-magnetic — no electronic adjustment or zone-selective interlocking.
At 55 °C it derates to 62 A, at 60 °C to 61 A, at 65 °C to 60 A, and at 70 °C to 58 A. Maximum power loss is 17.3 W at rated current — negligible for panel thermal budgeting but worth noting for tightly packed enclosures.