On a datasheet for a single pole, multiple contact switch, I see that there are a few contact ratings: non-switching (50VDC, 100mA), switching (5VDC, 100mA) and minimum (20mVDC, 1uA). What are these different specs describing?
If I anticipate my system to draw 3VDC at around 100mA (300mW), am I good to use this switch since it is rated for 500mW or must I obey the current and voltage specs independent of each other?
Best Answer
Non switching: You can apply 50VDC with a load current of 100mA as long as you don't change the state of the switch.
Switching: You can switch the load on and off all day with an applied voltage of 5VDC and a load current of 100mA.
Minimum: The applied voltage should exceed 20mVDC and the load current should be at least 1uA in order to guarantee reliable switching.
With an applied voltage of 3VDC and a load current of 100mA you should be fine.