ST63-40-M modular contactor

ST63-40-M – 63 A contactor with manual control

The ST63-40-M allows both automatic control of the coil and manual setting of the appropriate contact state using a control knob located on the front of the unit.

This feature facilitates system testing as well as installation and maintenance work.

Check the variant

ST63-40 – 63 A, 4×NO without manual control. 

ST40-40-M – 40 A, 4×NO and manual control. 

ST25-40-M –25 A, 4×NO and manual control

Contactor operation 

The operation of the contactor depends on the setting of the operating mode switch:

Position ‘I’ (upper position)
If the contactor coil is not energised, the contactor contacts are closed. When power is applied to the contactor, the switch automatically moves to the ‘Auto’ position and from that moment on
it operates in automatic mode. To lock the contacts in the closed position regardless of the contactor’s power supply, move the yellow locking lever to the left whilst in the ‘I’ position.



‘Auto’ position (centre position)
Applying the power supply energises the contactor and closes the contacts. When the power supply is disconnected, the contactor de-energises and the contacts open.



‘O’ position (lower position)
The contactor’s contacts remain open regardless of whether the supply voltage is present.