you can use a lower continuous current and use a small capacitor to provide a short higher current pulse for contact cleaning, ie when the contacts are open, the CCD tries to push it's constant current through the system, which it can't do, so it charges the "output" cap, and when the switch is closed, that cap drives a higher short pulse of current through the contacts at the moment of closing.
If you put a resistor across the switch to act as a diagnostic path, then you can still use this arrangement