be careful on DC coils! inside is PWM circuit to lower power consumption and heat and temperature, but the circuit is poor quality. it produces noise and any kind of communication close to this circuit is impossible. 1wire for example.
Inside is included some kind of coil power reduction. First moment coil consume much more, maybe 1A, after some time coil consume only small current. This is not in description. This undocumented circuit inside is source of noise, for example it is impossible to work with 1wire devices close to this contactor!