I need a component that mimics as closely as possible a single-pole double-throw switch as it relates to DC.
It will not be understood right now, but the normally open and normally closed contacts will be connected to the positive and negative poles of a battery or battery pack. There will never be a complete circuit or current flow. The criteria are that between the active contact and the common, the DC resistance must be less than 1 ohm, preferably less than 0.5 ohm.
Cost is a consideration. The less, the better.
Isolation between the NO and NC contacts, as far as DC, should be high, up to 200 volts at low amperage and up to12 volts at 1,000 amps.
Low power drain to operate the switch is a consideration also. As in a battery-powered device that one can carry in a pocket, with a variable-frequency square-wave oscillator that will alternate between the NO and NC contacts being connected to the common.
I have looked into solid state changeover relays, etc., but found they seem to be designed for AC signals and have a high DC resistance.
Any ideas? Thanks much for your time.
ps - This is a not-for-profit and open source endeavor. Will reveal all details when coplete. Very much of use to anyone. I just want to make it s simple and cheap as possible.