The Siemens 3VA1163-5MH36-0DA0 is a 3VA1 IEC frame 160 molded-case circuit breaker (MCCB) rated for 63 A continuous current with a breaking capacity class M — Icu of 55 kA at 415 V AC. That 55 kA interrupting rating means it can safely clear a bolted fault at the panelboard without upstream coordination failure, which is the spec that decides whether this breaker holds in a high-fault installation or cascades into the main. This 3-pole unit carries the TM120M thermal-magnetic trip — the thermal element provides starter protection (motor overload curve), while the magnetic short-circuit pickup is adjustable from 5 to 15 times In (315 A to 945 A). The 'AM' designation means it ships without overload protection on the magnetic side, so the thermal curve governs running overloads and the magnetic element handles only short-circuit events. That split makes it suited for motor branch circuits where a separate overload relay handles the running protection. It includes an undervoltage release (UVR) coil rated for 208-230 V AC 50/60 Hz. If control voltage drops below the dropout threshold, the UVR trips the breaker — common in safety circuits that need to drop power on loss of a hold-in signal. The clamp-type terminals accept copper or aluminum conductors without lugs, which speeds panel wiring.
Mounts on a DIN rail or panel-mount base in the standard IEC frame 160 footprint. The UVR coil terminals are separate from the main power lugs; verify the control circuit voltage matches the 208-230 V AC coil rating before energizing. The clamp connectors accept conductor cross-sections typical for 63 A branch circuits — no special lug kit needed.