What this 3VA1 breaker is and what it does
The Siemens 3VA1112-3EE32-0AA0-ZD00 is a 3-pole IEC frame 160 molded case circuit breaker rated for line protection. It carries a breaking capacity class N with an Icu of 25 kA at 415 V, meaning it can safely interrupt fault currents up to that level without welding or failing — a key spec for panel builders coordinating downstream devices in a distribution board. Overload protection is adjustable via a TM220 thermal-magnetic trip unit: Ir from 88 A to 125 A, so you dial in the continuous current to match the cable or load. Short-circuit protection is fixed at Ii = 10 x In (1250 A), which is typical for line protection where you want fast magnetic trip on hard faults but avoid nuisance tripping on motor inrush.
Lifecycle and sourcing posture
Same part, different passport — this unit includes a nut keeper kit configured for a DC Power OEM in China. That means the breaker itself is a standard 3VA1 IEC frame 160 device, but the accessory kit and packaging are tailored for that OEM channel. Sourced to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.
Integration notes for the panel builder
Mounts on a standard DIN rail or panel-mount via the 3VA1 frame's integral lugs. The 3-pole footprint fits a 160 A frame cutout; plan for 3 x 70 mm² cable terminations on the line and load side. The TM220 trip unit is field-adjustable without removing the cover — just rotate the dials for Ir and Ii.