Solid State Relays Explained: Speed Tests, Reliability, and PWM Control

[@LockyourHubs4WDing]

Will you now be moving to Solid State Relays for your 12V install?

[@eds4wdcamping]

Well, you've just educated me once again, Simon. Not so much with the graph, but with a diagram, I think I'll stick to the old-school relay for now. Thanks for the video

[@LockyourHubs4WDing]

You're welcome Ed! Don't worry, the next video is chocked right full of them :)

[@valyau2002]

Once again a fantastic lesson for us all. Thanks for that.

[@LockyourHubs4WDing]

My pleasure!

[@paulvictor9368]

I love your educational videos. It is nice to have some super smart like you that stretches my knowledge.

[@LockyourHubs4WDing]

Not sure about the super smart bit, but thanks!

[@AR3n3gad3]

Awesome Tutorial! Detailed and Simple to Understand Thank You!!! ❤

[@LockyourHubs4WDing]

Glad you liked it!!

[@prashanthb6521]

wow, thanks for the demonstration.

[@LockyourHubs4WDing]

You're welcome!

[@desert4seat]

Thank you so much for making this!!

[@LockyourHubs4WDing]

You're welcome!

[@MiniLuv-1984]

Nicely explained - as usual.

[@LockyourHubs4WDing]

Glad you liked it!

[@eizlan48]

Very informative. Thank you so much

[@LockyourHubs4WDing]

Glad it was helpful!

[@Oz4me_craig]

Great explanation as always, I like Solid state relays because they don't have contacts to burn out and become resistive, because the case is sealed, less prone to dust and moisture issues that cause that. Good quality SSRs are definitely worth the extra 👌

[@LockyourHubs4WDing]

I agree, under large loads, you might have to run a heat sink, but even then, I think it's worth it.

[@paulmeynell8866]

Nice video very well explained

[@LockyourHubs4WDing]

Thanks!

[@MRCtouring]

Some of your content would instantly go straight over my head (not this relay video) but the way you explain things makes me understand it instantly due to your explanations with diagrams. I didn’t even know there was solid state relays, haven’t really looked into anything solid state really so thank you. Also can you explain why they use the numbers they do on relays instead of say 1,2,3,4?

[@LockyourHubs4WDing]

That's a good question, I'm not sure why they use that particular numbering system on the conventional relays.

[@6226superhurricane]

because bosch made them and they're german so 12345 or abcde wouldn't be complicated enough

[@LockyourHubs4WDing]

@@6226superhurricane hahaha

[@JDT738126]

Awesome!

[@LockyourHubs4WDing]

Thanks!

[@lucysoutdoors]

I'm getting a E-locker for the car ,look's like I'm spending the big 🤑🤑🤑 on a Solid State. Another great video👍👍👍

[@LockyourHubs4WDing]

Good choice!

[@lucysoutdoors]

@@LockyourHubs4WDing Also purchased 1 solid state from your link Thanks

[@LockyourHubs4WDing]

@@lucysoutdoors happy to help, and thanks for using the link!

[@DeanoGoogleo]

Thanks for another great video. Some of the solid state relays on the market appear to have inflated ratings and fail to switch the current specified. If you ever have the chance it would be good to see if that holds true in a practical application.

[@LockyourHubs4WDing]

Great idea!

[@darrellstjohn]

hi Sir, so could you use a higher current ssr to modify a dc welder for pwm i guess you would need a large heatsink attached to the relay for heat?

[@LockyourHubs4WDing]

I can't see why not, you would need a pwm spice where you can not only vary the frequency, but the duty cycle as well.

[@justin9162]

Awesome video mate i didn't know that these existed, Could you use a solid state relay to dim your 12v camp lights by adding a dim switch?

[@LockyourHubs4WDing]

As long as the dimmer used PWM, it would work fine.

[@glen432]

Brilliant video! Would have been good to see the mechanical relay attempt to dim the bulb using PWM. Would it flicker? Would it dim when the pulses are slow enough for the coil to de magnetise? Would the relay rattle itself to death?

[@LockyourHubs4WDing]

Unless the cycle rate was very low, it wouldn't allow enough time for the magnetic field that activates the relay to collapse, so the relay would just stay on.

[@johnallen3555]

what you did not address is the efficiency of each of the two types of relays at various loads - the heat generated at various loads

[@LockyourHubs4WDing]

The "coil" or the "contacts"?

[@Mouldyturnip75]

Well explained as always. PWM - would this work on a water pump, allowing me to adjust the water flow? could then use a bigger pump and slow it down when needed....??

[@LockyourHubs4WDing]

Yes, you could definitely control the flow volume of a DC powered water pump with PWM.

[@zacandmillie]

OK so this all looks very technical but you have planted a seed of confusion in my non electronically trained brain. First: As I'm learning about relays I see all the other videos show primary power from the battery is in at pin 30 and out at 87 or 87a. The switch (on/off) goes through 85 and 86. You have those swapped around. Secondly on the solid state relay you have the power from the battery in on the terminal marked -4 then later you have power in at the 3+ terminal. Could you please clarify these points. Thanks

[@LockyourHubs4WDing]

30 is in and 87a is out NC, 87 is out NO. I might have messed up the diagram on the SSD, though the actual wiring is fine.

[@WorkChannel-s5t]

it looks like i can use Pulse Width Modulation on the solid-state relay instead of a Variable Frequency Drive?

[@josepeixoto3384]

i was able to turn on the lamp with just the switch, no relay needed, but i had bought the relay, what do i do with it? is it really needed, the switch seems to hold the bulb on fine?

[@vicentecarrasco3653]

A solid state relay can work in a 12volt discharged battery?

[@LockyourHubs4WDing]

With the battery at a low state of charge?

[@vicentecarrasco3653]

@@LockyourHubs4WDing yes,for example a 12volt discharged battery when is below 12volt.

[@LockyourHubs4WDing]

@@vicentecarrasco3653 the switched output doesn't really care what state of charge of the battery it's switching. The input switching voltage must be compliant with the specs of the particular SSR you're using. In this case it's 4-32v DC.

[@rd2120]

Tolong skema kan untuk motor supra GTR . Saya dari indonesia tidak terlalu lancar bahasa inggris. Dari aki positif dan negatif yang mana. Dan buat ke saklar dan ke dinamo yang mana. Terima kasih From indonesia❤