Go Down

Topic: SSR question (Read 610 times) previous topic - next topic



Can i really connect this one direct to Arduino output without additional circuitry needed for using 70 Watt 230VAC waterpump ?


Seems to be very affordable   $)
My software has no bugs, only random features.


It should work fine without any additonal circuitry.   

Motors are inductive, so I'd kind-of like to see if it's rated for inductive loads...   But, at 75W you'll be using less than one amp so you have quite a bit of safety margin.

The price is lower than usual, so it's probably surplus or removed from equipment (used).


Thank you, i'll give them a try.

btw "brand new and high quality"  8)
My software has no bugs, only random features.


Feb 09, 2013, 10:40 am Last Edit: Feb 09, 2013, 10:42 am by dc42 Reason: 1
That SSR is of the zero crossing type, so it may not work properly with an inductive load such as your pump. You should preferably use a random-fire SSR or a power opto triac. See http://www.crydom.com/en/Tech/Newsletters/Solid%20Statements%20-%20SSRs%20switching%20types.pdf.

PS - I suggest you look for an SSR with a lower current rating too, say 1A rather than 25A. The leakage current of a 25A SSR may be rather high, also there is a risk that the small current drawn by your pump may not be enough to keep a 25A SSR turned on.
Formal verification of safety-critical software, software development, and electronic design and prototyping. See http://www.eschertech.com. Please do not ask for unpaid help via PM, use the forum.

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131