The Siemens 3VA1163-6MH36-0BA0 is a 3-pole IEC frame 160 circuit breaker with breaking capacity class H — meaning it interrupts 70 kA at 415 V without welding or damage. That 70 kA SCCR gives you headroom for high-fault panels where a standard 25 kA or 36 kA breaker would cascade upstream. Rated In = 63 A, with a TM120M thermal-magnetic trip unit set for starter protection (motor branch circuit). The adjustable short-circuit pickup Ii = 5...15 × In lets you coordinate with downstream contactors and overloads without nuisance tripping on inrush. This variant ships without overload protection — it is a magnetic-only short-circuit protector for use ahead of a separate overload relay. The undervoltage release (UVR) coil is 24 V DC; if that control voltage drops, the breaker opens instantly, which is standard for emergency-stop chains or undervoltage protection schemes on conveyor lines.
Deployment context
Mounts on a standard DIN rail or panel-mount via the 3VA1 frame's integral latching mechanism. The clamp terminals accept copper or aluminium conductors up to the frame's rated cross-section — no lug kit required for the main power connections. The UVR coil draws a few milliamps at 24 V DC; verify your control transformer can supply the holding current without a separate power supply.