Link For ONE HUNDRED AMPERE DC/DC Solid State Relay

[MEXICOWANDERER]

http://www.futurlec.com/Relays/SSRDC30V100Apr.shtml

It needs a finned radiator base (heatsink) but the voltage drop through the MOSFETS transistors is less than the voltage drop through a standard mechanical relay. The trigger mechanism uses about 1/200th the power of a standard relay. Meaning this critter is a realistic way to turn main power off and on for most of the loads in a rig. No slideouts recommended to be connected. It isn't for everyone. Not everyone needs to turn power on and off that often or need the convenience of a remote stitch.

But then again, it can chop 12 volt power at a converter or charger 12 volt power outlet giving a user the option of either AC or DC control over power items. Small inverters too, perhaps to 500 watts or so but definitely not for 1,000 watt inverters. Sit back, grab a remote control and control a wireless relay that powers this relay. Presto, no more tears!

But don't forget the heatsink and don't forget the thermal mounting grease for the heatsink.

[MEXICOWANDERER]

The newer breed of MOSFET has substantially less vf even at capacity I max. 67 amps at .22 vf.

Time marches sideways so to speak

[christopherglen]

I have used SSR's (usually crydom) for many projects, usually when I need minimal switching power IE a battery device switching something with it own power supply. Or optical isolation of the switch, or insanely high switch speed / durability.
For general switching in rv's I tend to use relays.

For example

SSR's have a .5 to .75 volt drop across them, hence the need for a heatsink several times their size. At high loads, what you save on switching current, you loose on load voltage.

[ken_white]

Yep, SSR have some advantages over their mechanical counterpart.

🙂

[MEXICOWANDERER]

And low voltage control. A 22 gauge control wire running the full length of a long motorhome? A very low power wireless relay controller? Full control of a TWENTY FOUR VOLT power supply?

[ken_white]

Looks like some good options if you need a SPST device.

[MEXICOWANDERER]

"Bimp"

-J Clouseau