The Siemens 3VA1140-4EF32-0HA0 is a 3-pole IEC frame 160 circuit breaker in the 3VA1 series, rated for a breaking capacity class S with Icu=36kA at 415V. That 36kA interrupting rating means it can safely clear a fault up to that level without upstream devices needing to trip — critical for selectivity in a distribution panel where you want the breaker closest to the fault to open, not the main.
Protection and trip unit
It carries a TM240 line protection trip unit with a rated current In=40A. Overload protection Ir is adjustable from 28A to 40A, and short-circuit protection Ii is set at 5 to 10 times In. That adjustability lets you fine-tune the trip curve to match the load — a 30A motor branch, for instance, can be set at Ir=30A and Ii=5xIn (150A) to ride through startup inrush without nuisance tripping.
Shunt trip and accessories
The breaker includes a shunt trip (STL) rated for 12-30V DC or 24V AC 50/60Hz, plus a nut keeper kit. The shunt trip allows remote tripping from an emergency stop or a PLC digital output — useful in a wastewater lift station where you want to kill power to a pump from the SCADA room without walking the panel.