What this MCCB delivers
The Siemens SENTRON 3VA1163-3EF36-0DH0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with the same 63 A holding at 45 °C and 50 °C before thermal derating begins — at 55 °C it carries 60.48 A, at 60 °C it carries 59.22 A, at 65 °C it carries 57.96 A, and at 70 °C it carries 56.7 A. That derating curve means a panel builder can size the breaker for a full 63 A load only if the enclosure ambient stays at or below 50 °C; above that, the load must be trimmed per the published figures. Breaking capacity is specified at four voltage levels: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 10.5 kA at 690 V. For a 400 V three-phase panel, the 52.5 kA figure at 415 V is the relevant fault-interruption rating — it tells the specifying engineer the breaker can clear a bolted fault up to that level without rupturing, which governs the SCCR of the downstream equipment. The TM240 overcurrent release is a thermal-magnetic design — the thermal element handles overload protection (inverse-time curve), and the magnetic element handles short-circuit instantaneous trip. This is the standard release for line protection (cable and busbar feeder protection), not motor protection; there is no phase-failure detection or ground-fault monitoring on this variant.
Panel fit and integration
Dimensions are 130 mm height, 76.2 mm width, 70 mm depth. The 76.2 mm width is a standard 3-pole MCCB footprint — it occupies three 25.4 mm module positions on a DIN rail or mounting plate. The 70 mm depth is shallow enough for most 200 mm deep enclosures; verify clearance for the undervoltage release coil and auxiliary contact wiring at the front. Front protection is IP40 — the breaker face is protected against tools and wires >1 mm, but not against water ingress. This is standard for indoor panel mounting; no washdown or outdoor rating is claimed. The auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ version). The trip alarm switch changes state only when the breaker trips on fault, not on manual open — useful for remote fault indication in a PLC input. The undervoltage release (UVR) is fitted as standard on this order code; it will trip the breaker when control voltage drops below the dropout threshold, which is typical for emergency-stop or undervoltage protection schemes.
Lifecycle and sourcing posture
Rated insulation voltage Ui is 800 V, and the storage temperature range is -40 °C to 80 °C, while operating range is -25 °C to 70 °C. The storage limit exceeds the operating limit — that governs handling and warehousing, not running conditions.