YuCo YC-CN402-24V CN-PBC402-24V DEFINITE PURPOSE CONTACTOR with a Packard PF42440 Control Transformer Class II Foot Mount 40VA 24V to activate the 2vac coil. The circuit is a 220v 20amp motor. My question is how much current draw does it take to open that 24vac coil on the contactor? Will it take all the current from the transformer to drive the coil? If it does not take all the current can you split the current out of the transformer and use it for say driving the controller (Arduino). Thank You for your help.
Electrical – Contactor’s Coil Current
contactor
Best Answer
It looks like the coil needs a maximum inrush of 32VA at 60 Hz, so you have some power left over to drive a controller. The holding current is much less, so if you have a big enough filter capacitor on your Arduino power supply to last through the inrush, you can use more average power.
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