Siemens 3VA1463-5EF32-0AF0 — IEC Frame 630 MCCB with TM240 Trip Unit
The Siemens 3VA1463-5EF32-0AF0 is a 3-pole IEC molded-case circuit breaker in the 3VA1 series, frame size 630, with breaking capacity class M rated at Icu=55kA @ 415V AC. It carries a TM240 thermal-magnetic trip unit, ATAM (adjustable thermal, adjustable magnetic), with a nominal current In=630A, overload protection adjustable Ir=440-630A, and short-circuit protection adjustable Ii=4-8xIn. The breaker includes one auxiliary switch (changeover H) and one trip alarm switch (changeover).
What the Ratings Mean for Fit
The Icu=55kA @ 415V means this breaker can safely interrupt a fault current up to 55,000 amps at 415V without failing — that is the ultimate short-circuit breaking capacity per IEC 60947-2. For a 630A frame, that is a high-interrupting rating suitable for main or large feeder breakers in industrial switchboards where available fault current is substantial. The TM240 trip unit is thermal-magnetic: the thermal element provides inverse-time overload protection (Ir adjustable 440-630A), and the magnetic element provides instantaneous short-circuit protection (Ii adjustable 4-8xIn, so 2520-5040A). This is a standard line-protection trip curve, not a selective or electronic trip — it is sized for cable and busbar protection in distribution panels. The auxiliary switch and trip alarm switch are built-in, so this order code includes status feedback and fault indication without needing a separate accessory module. The nut keeper kit is also included for secure mounting in the panel.
Deployment Context
This MCCB mounts in a low-voltage switchboard or distribution panel, typically on a mounting plate or DIN rail via the included nut keeper kit. It is used as a main incoming breaker or large feeder breaker in industrial and commercial power distribution, sized for 630A continuous load.