Why can't a power contactor switch low current ?
First, we must establish how low is low current, and do we mean dry circuit or low level ?
Power contactors can switch low current, but the question arises why would we want to use a heavy-duty contactor or switch low level or dry circult if we didn’t have to ?
Also power contactors (contact rating of 25 amperes and upwards) have a tendency to falter or become intermittent when switching currents of one ampere or less.
Under normal conditions, one would choose a relay, which is rated for low level current switching capabilities.