I test a small alarm for current leakage with the switch in the OFF position.
It showed a drain of 2 uA.
Is that typical ?
Thanks,
Andy
You would have to open the device to see if the switch really
disconnects the internal circuitry. It wouldn't surprise me if there was
a large cap on the DC input before the switch.
You also have to determine if the switch is even a switch in the literal
sense of the word. To keep cost down, many switches are just a means to
send a signal to the circuitry to wake up or not.