What this breaker carries and what it means
The Siemens 3VA1163-5EE32-0CA0 is a 3-pole IEC frame 160 MCCB with a 55 kA breaking capacity at 415 V — class M, meaning it clears high fault currents typical in industrial distribution without cascading upstream. The thermal-magnetic trip unit (TM220) gives you adjustable overload protection (Ir = 44 A to 63 A) and a fixed short-circuit pickup at 10 x In, so it's set for motor or feeder protection where you need a deliberate magnetic threshold to avoid nuisance trips on inrush.
Built-in undervoltage release and keeper kit
This variant ships with an undervoltage release (UVR) rated 120-127 V AC 50/60 Hz and a nut keeper kit. The UVR drops the breaker on loss or dip of control voltage — standard for safety circuits where a downstream machine must trip if the control supply fails. The keeper kit retains the mounting nuts during panel assembly, which saves time on a DIN-rail or backplate install.