Siemens 3TB40 Contactor is a three-pole power contactor with a 220 V AC coil, designed to switch three-phase loads in industrial control circuits. The 3TB40 family forms part of Siemens' legacy line of motor-contactor products, offering robust operation for reliable actuation in control panels. This model supports use for starting and stopping three-phase motors and other inductive loads in automation environments, with the 220 V coil variant ensuring compatibility with common European control supplies.
