How to use Fotek SSR-40 Solid State Relay with Arduino and without Arduino

This video shows you how to use 40A Fotek Solid State Relay with Arduino and without Arduino.
You will see the test of all input voltage range. Also codes is explained and the wiring.
This SSR works only with AC load. DC load will not work.
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00:00 Introduction
01:41 Wiring explained
03:28 Control voltage range
05:20 Demonstration of controlling load using Arduino (Microcontroller)
05:53 Arduino code explained
07:50 Code to control a load based on some condition
Download the code for Fotek Solid State Relay: robojax.com/L/?id=187
Learn Arduino in 30 Minutes (video): robojax.com/L/?id=135
Tutorial by Ahmad Shamshiri form Canada
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Learn Arduino from a proven instructor with 100s of projects, code, wiring diagram in structured course in one place. Purchase Arduino Course at Udemy.com : robojax.com/L/?id=153
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[@2008koss]

Great video man !

[@robojax]

thanks.

[@artdoneus]

Thank you so much!!!!! Saved me for my senior design project!!

[@robojax]

You are welcome. good to hear that.

[@StreetFCbaltimore]

You’re the big boss!

[@robojax]

I am just tutor. ❤️

[@xiphefu5582]

Thanks for your explanation very usefully.

[@robojax]

You are welcome.

[@bhudizky21]

Thanks man!

[@ZasaSaza34]

Very useful preview thx

[@robojax]

You are welcome.

[@lmntrlmntr3496]

I bought a SSR 40 A A and sent it back. I used it to control a 115vac load and the relay was allowing 51 vac through and the input was off. Same brand. I suggest if you bought any of these that you check voltages when it is supposed to be off. Apparently it was working with input on and happened to check load voltage off and found out then it was allowing voltage through which definitely I did not want!

[@robojax]

thank you for sharing your experience.

[@reymondarmecin6574]

Thank you so much sir

[@robojax]

Most welcome

[@Omar.bin.khattab]

thanks a lot ...

[@robojax]

You are welcome. Ahmad from Canada.

[@ristomatti]

I'm not sure if this is universal but at least in Finland it is nowadays instructed to not solder coat mains wires attached to screw terminals. The reasoning is because solder can easily crack, making the connection loose. Instead a better practise is to crimp the wire ends or just twist the stranded wires together.

[@robojax]

I agree. For safety reasons it should be implemented. Different countries have different code for this practice and safety should be the top priority/

[@IbrahimMA-EGY-suez]

nice

[@bomai559]

Great video! Thanks! I just have a question - do you know if the back metal plate that attaches to heat-sink is completely isolated from all other circuits? Can I mount SSR to grounded metal body of the device?

[@robojax]

You are welcome. I did not pay attention that that and don't know.

[@toozinger]

It should be isolated. But to check, use a multimeter between the backing and each of the lead attachment lugs to check continuity.

[@bomai559]

@@toozinger I decided not to use Chinese replica Fotek SSR that came with my 3d printer's AC heated bed. Instead I bought two SSRs of another brand from mouser.com. One is controlling heated bed, another printer's main power supply. Both SSRs are attached to the same metal plate and work just fine. So, the original SSRs are isolated and can be mounted to grounded heat-sink, as for replicas - they should be isolated as well, but you never know...

[@rizwanmoiz]

nice video, however I have a challenge, I am using SSR-40 DA to control air compressor., source DC switching is done by controller board DLC32 (Doesnt matter). The relay switches on as I can see the read light turn on however the load remains off, until I unplug the AC supply and turn it on again. It then switches on successfuly. Also once the source DC is switches off AC successfully switches off. I was wondering what could cause this since these relays have in built snubber circuits

[@DupczacyBawol]

Input current for different volatges??

[@nicolaskeroack7860]

Can I use the arduino gpio pins to control a ssr100(60 more ampere than this one); And use the relay to control let's say a phone charger, and sometimes a lamp? Or it wouldn't work because the relay would be overkill for this application? Thank you so much for your work

[@robojax]

I have not tested it but it should work as the input of the device just needs signal which Arduino can send.

[@EnergySeeker]

nice video for the SS RR DC DC what frequency for the output limitation ? as a square wave i mean in the putput

[@robojax]

this is for AC only. square wave will not work.

[@EnergySeeker]

@@robojax I know but I asked about the one for dc input and output dc

[@BloominOnion1]

you want a continuous signal, on or off, instead of PWM for this application.

[@kirt041]

How do we know that such a relay (or maybe two at the same time) won't draw so much current that it damages the Arduino?

[@kentlou.delacerna]

Hello I am controlling AC Motor 25A 220V Single Phase. I will just put the wire just like the bulb or I need to put some circuit with it?

[@robojax]

Hello, yes exactly the same way. Please subscribe. I appreciate it and helps my channel grow. Thank you

[@jeranrai645]

so seems like its just gonna work like a switch either ON or OFF, is it also possible to control the current so as to control the brightness of light ! ? ! .. i hope to get reply soon.. thanks

[@robojax]

that is called dimming the light. so you need dimmer kzbin.info/www/bejne/sHu0l2mYg9SXnqc

[@2150dalek]

I'd feel better using that SSR to control a hot plate than the small 2 amp one.

[@ectv]

How to use Fotek SSR-40 phone call? like when some one call the bedroom lamps light to come one or off when ithe phone rings?

[@robojax]

then any call with turn the light ON. Now days you can control a light using WI-FI. I have a video on that.

[@qaisarawan93]

How many mili amps does it pulls? Can I use it for microwave oven transformer spot welder?

[@robojax]

it needs 10 to 20mA. I just watched the video. For load capability, please watch the video as I have explained it. it seems you have skipped the video or missed it.

[@user-hr2gq3ti8s]

Thanks for the helpful video. I also use an SSR with a temperature controller, but I am often afraid that it is not much powerful as wrote on the label. On my channel there is a training video on how to connect an SSR to a controller, please watch it/

[@robojax]

I just visited your channel and watched your last video that you control heater with temperature control and SSR. Excellent work. keep it up.

[@user-hr2gq3ti8s]

@@robojax thank you. Your positive rating is very important for my young channel

[@boopeshkumarprabhakaran]

can I use the same solid state relay to control air conditioner and geysers with micro controllers?

[@robojax]

Arduino is a microcontroller and I demonstrated it. the amount of load you are trying to control should be equal or lower than rated current written on the SSR-40.

[@augustovazquez9826]

i love you, do you think this will workrswith a raspberry instead the arduino???, and with a rss dc-dc ???

[@robojax]

this project is specifically for Arduino

[@arishy]

Having 3.x volt to activate the relay give it a LOT of use with ESP8266. My question to you is how I can make it LATCH once it gets the 3.x high ?? Also it will be great if you can demo this with a toggle capabilities. I want to activate it with a touch sensor. Is all that possible ???.

[@robojax]

Here is my video exactly doing that. kzbin.info/www/bejne/hKLLYqmPhqp4oNU&t just your own relay instead of the one shown in video.

[@zackycepu2382]

im from indonesia,btw...more effective where connecting contactors with Arduino or SSR with Arduino??thx

[@robojax]

you are welcome. Sorry I missed your comment. Ahmad from Canada

[@andrelevesque6300]

Hi, do you have a project explaining how to use a PID with Arduino SSR's. I'm building a powder coating oven with two 220V 2000W elements. I need to control them like a PID using and arduino. I dont want to use a PID comercially available because too many parameters i dont need. thansks

[@robojax]

hi, are you talking about talking about control system? is so NO. The more advanced video I make the less people are interested. So I am going towards basic and simpler videos and tutorials.

[@madhukeshnp]

Hello !! Can we dim a led stip by using solid state relay? Or control the speed of the fan (both AC AND DC)

[@robojax]

Hi, This is good point. I should tested the dimming. In the data sheet (provided with the code) the response time is less than 10ms. So if you use PWM, you can dim it .

[@madhukeshnp]

Robojax thank u for the quick reply. Please make a tutorial on it so that it will be help full for everyone. And i came across ( OMRON 1556E G3MB-202P ) while i was searching for solid state relay. Is it the same working behaviour as what you have used in this tutorial?

[@robojax]

I try to create a video on that. For the Omron solid state relay, the principle should be the same here is my video on that (omron ssr) kzbin.info/www/bejne/aKqZpWN9pMp2kKM and here is video on module used OMRON SSR kzbin.info/www/bejne/bGWxkqeCmqyml6c

[@madhukeshnp]

Robojax wooo how come i haven't come across that video !! Strange !!! Thank you for the tutorial. And i heard you saying you can turn on the heater in that tutorial. But 2A current is way too less right ? Is there any other relay available with more current capabilities? Thank you for your replies.... 🙏🙏

[@robojax]

You are welcome. 2AX 240=480W, there are small heater or heating elements in industrial applications. if you want higher current Solid state relay, the size increases,.

[@shafinkadhir9693]

can you please make a video to use this relay with NodemCU?

[@robojax]

exact the same way. here is example kzbin.info/www/bejne/rZXKiJeui5tjmsk

[@RonenLin]

Can I use an ESP8266 module and a 40DA SSR 40amp relay to control an electrical smoker?

[@robojax]

yes you can.

[@fikriahdiar2726]

@@robojax pin plus relay to pin esp ? its not work

[@hastrinam.salleh5072]

hello, I have a project which I want to control the rpm of brushless motor by inserting a voltage in labview. I have NI9201 as my analogue input and also a solid state relay can you guide me in my project?

[@robojax]

brushless motor is totally different motor. it has 3 wires of power like 3 phase. you need ESC (Electronic Speed Controller) see it here kzbin.info/www/bejne/aXPZiYt4eNaknMU

[@hastrinam.salleh5072]

@@robojax yes does the brushless motor can't be controlled in labview?

[@acqurius-gx8lr]

is there any way to fully off the SSR.How will motor change direction while one side is already getting leakage voltage from SSR.will it cause demage to motor.

[@robbykhen]

acqurius 2018 I guess you have to explain what is your project first

[@robojax]

didn't we? it says "how to use ...."

[@proximacentauri3916]

what if I just want to test the SSR without any AC load? is this possible? let's say I just wanna make sure this SSR open or close, and then get the statue by print it out on the Serial monitor. so the SSR pin 1 and 2 not connected with anything

[@robojax]

yes. you can. Arduino will not know if load it connected or not.

[@deepwindingworks2702]

Boss very wel I want know about 3 pase 500 v. 40 Amp.

[@robojax]

thanks and good luck with your project.

[@avtandilachelashvili7594]

Will this 40A Fotek Solid State Relay cause any Back EMF?

[@robojax]

this is not a mechanical relay. it is solid-state components and not EMF.

[@HatulaKing]

I've been hearing that SSRs won't turn off since the Triac does the job internally and the current has to be cut between outputs. How come this one goes off? Thank you for your video, very useful.

[@HatulaKing]

Nvm, just realized it's with AC. Would it turn off with DC?

[@robojax]

DC would not turn it ON as it needs both negative and positive half cycles to turn ON or OFF.

[@abhishekhavanur9859]

How can I connect AC motor half hp to output side of SSR

[@robojax]

motor is the same as bulb. connect it the same way.

[@protechnology550]

iwant 3 hp waer motor by this relay so i can ?ahamad bhai help

[@robojax]

I tested the current. You 3hp itself has no meaning without the voltage or current. But I tested and shown that this can handle 40A. so you do the math.

[@MochChamim]

Hi Robojax How to used this for temperature control? Thanks

[@robojax]

Hi, you are welcome. This is just a switch. you can turn it ON and OFF using temperature. I have explained how to control something with temperature in this video kzbin.info/www/bejne/iWasc5aVmtWUZ6M (in the code section)

[@MochChamim]

@@robojax thanks, its very help me

[@robojax]

You are welcome.

[@matthewlomax5925]

I have a problem with the same SSR. I'm using it to run a pump but when I engage it with a timer running 24dcv, nothing happens. So I switch the pump off and back on it seems to work fine until the timer kills the 24vdc and it shuts off perfectly. Anyone have any ideas that could help?

[@robojax]

What does the timer do? Perhaps you connected the timer after this module. It should be connected before the module directly to the power.

[@zz-wo9iv]

Hi sir, is there a way to adjust the output voltage to 220V?

[@robojax]

no. this is just a switch that turns ON/OFF the power.

[@lamehunter]

that songle relay 10A seem not to be trustworthy, if I do not exceed current and assume I will try to handle 5A max on 10A relay, is there any fire hazard possible?

[@robojax]

for safety question please contact the manufacturer.

[@janybasha4183]

Hello Everyone, I have a small question about SSR D1D100, I have a battery output connected through SSR to Load Motor, and I can easily Turn On and Turn OFF SSR D1D100 with input Voltage as wanted..but it is only Battery Discharge Mood connecting Motor but When i want to charge the battery, I have same SSR connected and Charging through Relay in to Battery(I can also Stop Charging by Turn OFF Relay and TURN ON Relay to Charge was the IDEA) ..So I don't know why these SSR works few days and Goes always TURN ON Mood? so my question is are these SSR D1D100 only used to connect load and discharge not to Charge Battery ? Unidirection not Bidirectional? Thank you for your Helpful Answer

[@robojax]

This was hard to understand. Please draw a diagram, post it on snag.gy/ website by copying and pasting. You don't need account. Once your photo is displayed on snag.gy/, you will have unique URL (website address), then post the address here and I will look at the wiring diagram and reply. You can use Windows Pain to draw.

[@Lucast3]

this relay can be controlled with PWM? And how much frequency?

[@robojax]

please see the datasheet. The link is in on the same page with code.

[@Lucast3]

I already see.. the datasheet does not mention pwm '-'

[@joshitoshi9835]

can this relay control 2hp ac motor?

[@robojax]

I did the test. you do the math based on the voltage, current and power.

[@dyoweldesigns2778]

does this relay have opto isolator?

[@robojax]

I don't remember what I said in the video, but if it has, I should have mentioned it.

[@EnergySeeker]

i have a SSR and arduino how can i control the SSR by arduino if the SSR start to activate the switching at 6.5 volts not less ? thanks

[@robojax]

Solid state relay is for AC power only.

[@EnergySeeker]

@@robojax to activate the solid state relay I have it’s written on it 3-32 VDC but it need 6.5 vdc how can I control it with an arduino

[@robojax]

then use the method I've shown in the video.

[@EnergySeeker]

@@robojax the arduino will not give a signal of 6.5 volts maybe 5 volts max but not 6.5 that is the main issue

[@EnergySeeker]

@@robojax either you dont know the answer or just acting stupid so thanks for nothing

[@khaizertechnology3017]

can i used multiple ssr

[@robojax]

Yea if our course you can. Just define pins and all variables which I have explained. It will work or see my other video showing 4 channel relay and use that code

[@acqurius-gx8lr]

can we use SSR to control the direction of reversible AC motor.i tried your circuit but bulb get ON with dim light although I have not given On command from controller.how I can resolve this issue.you have not discussed this issue in video and also not shown this situation.

[@robojax]

This can just turn ON or OFF, you should control the direction of rotation either before this or after this.

[@robbykhen]

I think you bought the fake SSR, the cheap (fake) one have a poor isolation. Yours are broken, you better get the original one for serious project. And your question about SSR control direction of AC motor, where did you heard that SSR can drive those motor back and forth? You need a AC motor controller for that.

[@ricardorellones6404]

How to use ssr dd or dc output

[@robojax]

Will not work. Use mosfet

[@wangouthangout]

Didn't explain the wiring fully. Does the hot end of the AC side connect to ~1 and the device to ~2, or it doesn't even matter? Do you connect live or neutral to the relay?

[@robojax]

you made me watch the wiring section of the video. It can't be explained better, even I mentioned and showed the AC plug of different type. If I type here again, then why I made the video. Please watch. to get the answer.

[@wangouthangout]

@@robojax Sorry you didn't explain whether you use the relay as a breaker on the live or neutral wire you just said that in some countries the plug is impossible to identify which is which. It's not impossible where I live and it's kind of important.

[@robojax]

Did you see when I shown the bulb? That is the answer

[@tritile]

Will it work in PWM?

[@robojax]

AC load power us not controlled with simple PWM.

[@skd7626]

What is the reliability of this ssr is it still running

[@robojax]

If you get the authentic party it should be very reliable. If you put higher than 5 A load then attach a heat sink.

[@skd7626]

@@robojax thanks for the replay, one more question, how much min current is required on the signal to make this relay work, I'm building a project and incase I wanna hook this on to a raspberry

[@benjaminvincent2578]

I really wish I could get this to work. My lamp won't flicker on / off.

[@robojax]

play with the delay in the loop and it will get fixed.

[@bhartiraut4377]

Hii can any one tell me? How to control 3 phase motor using arduino and ssr plz

[@bhartiraut4377]

Plz

[@robojax]

you will need 3 Triac and complex control of phase to make it happen. possible but it needs some. becaucse very few people need, i wont' work on it. I work on projects that lots of people benefit from it.

[@jdkalaw3254]

Can i use that as a replacement for Crydom A2440 40A?

[@robojax]

this code should work .

[@pookoye]

doesn't work with a 1/2HP motor, i used SSR-60 but the motor doesn't turn on instead it is humming

[@robojax]

I mentioned the maximum current and voltage. so check the datasheet of your SSR and your motor. it should work if you don't go above the limit.

[@pookoye]

@@robojax figured out, problem was 5V input & working after connecting 12V, thanks for your time....

[@randycarter2001]

All good except for the SSR you're using, according to Underwriters Laboratory, is a FAKE. It suffers from under rated internal parts and marginal isolation properties. It can at most handle 16 amps and will fail a 2500 volt isolation test. Use with care.

[@robojax]

Good.

[@robbykhen]

Yes, I'm aware of that too, my sugestion is to use the cheap one for low current load only. If you need SSR to switch something expensive, you better buy the expensive SSR too.

[@RajatSharma369007]

How much load can it handle? (in watts)

[@robojax]

What my friend. That’s why I made this video . V*I=P

[@RajatSharma369007]

@@robojax You showcased the varying voltage on the input but I am talking about output. It would have been better if you could have applied a varying load at the output.

[@edumaker-alexgibson]

Please be careful - it looks like you have a counterfeit SSR there! Look at the font on the logo - it really says 'FQTEK'...! There are several variations on this all over the internet but they all contain non original parts. The thing is they may appear to work as expected, but they will not be safety tested and are unlikely to be able to match the rated power without overheating, They are more likely to fail ON which could be very unsafe.

[@robojax]

Thanks for sharing. The code and my test is useful if they get “authentic” module

[@keesvink6018]

Be very careful with these SSR!!! I used a 25 A SSR relais of this type and brand for a 230 V 2000 W water heater. After a few weeks it completely burnt and I am happy my house was not set on fire.

[@robojax]

Thanks for the info

[@JonTheChron]

Counterfeit FOTEK SSR

[@robojax]

show me the the authentic? link please.

[@JonTheChron]

Notice from UL about counterfeit SSR. www.ul.com/node/81246 Proof of counterfeit SSR: protosupplies.com/inferior-counterfeit-fotek-ssr-25-solid-state-relays-on-the-market/ Authentic FOTEK SSR, there are other sellers. www.ebay.com/str/plchappy?_bkw=fotek%20ssr

[@JonTheChron]

@@robojax www.fotek.com.tw/

[@JonTheChron]

be carefull with ebay link, even that seller has pictures of counterfeit relays

[@robojax]

I just checked it www.fotek.com.tw/en-gb/product/820 how do you say it is counterfeit ? are you the manufacturer? send me the authentic item for review. contact me via robojax.com contact page.

[@alexmancera3298]

Oh, so you are using a counterfeit SSR-40, try originals.

[@alexmancera3298]

You are actually using a FQTEK, not a FOTEK, I can't tell if this clone has good quality and compliance.

[@robojax]

may be. But the code and how to use it will apply to the "authentic" if such thing is true.

[@christopherguy1217]

I hate to burst your bubble but that Fotek relay is a fake and probably can't handle 15A. Also the isolation is very poor, this an electrical hazard.

[@robojax]

I just presented my test results. Why fake? Tomorrow you come and start a new firm. NEC comes and says you are fake. This won't be true. Whoever is behind Fotek, they are legit as ST or TDK or NEC.

[@tonyweavers4292]

I bought one of these to play about with. When connected to AC I get about 12 Volts AC to earth from the input side. Surly this can't be right? I think you are right about the isolation. I have never had a look at a proper one so have nothing to compare.

[@ristomatti]

More details here: protosupplies.com/inferior-counterfeit-fotek-ssr-25-solid-state-relays-on-the-market/

[@sohardtogetID]

Make sure you buy FOTEK, not FQTEK. 99.99% of this kind of SSR on the internet are FQTEK which is a copycat of FOTEK. FQTEK's capacity rating is way, way, way over actual capacity.

[@roperhl]

Does PMW works on this SSR?

[@robojax]

Interesting point. I am not sure if this device can be turned ON and OFF that quickly. I have not tested that.

[@herpingvietnam2724]

I dont think it is gonna work, AC has already 50Hz of frequency, which means the signal up and down like crazy in 1 second, and now you add PWM in it. Imagine how nightmare the wave form would look like