What this 3VA1 breaker carries
The TM240 thermal-magnetic trip unit gives adjustable overload protection (Ir) from 112 A to 160 A, and a short-circuit pickup (Ii) set from 5 to 10 times In. The shunt trip lets a remote safety relay or PLC signal drop the breaker under emergency-stop or process-interlock conditions — common in conveyor and pump panels.
Because it's a current-production part, the BOM line is stable — no last-time-buy clock running. For a plant spares crib or a panel shop standardizing on the 3VA1 frame, this is a fast mover you can keep on the shelf with predictable min/max levels.
The nut keeper kit (included per the description) secures the breaker in the panel without loose hardware — a detail that speeds up assembly for the wireman. The shunt trip and auxiliary switch are pre-installed on the left side, so there's no field-assembly step for those accessories. Verify the shunt trip coil voltage matches your control circuit: it's rated 110-127 V AC/DC, not 24 V.