[chbot] Matthias Wandel, and his amazing exploding SSR

[Mark Beckett]

Hadley has 60A versions at $22.

https://nicegear.nz/product/solid-state-relay-ssr-60a

They are a chinese version with no information, but I have one here if 
someone wanted to do some load testing.

Stick a 10A load on it and measure the voltage drop across it, and you 
should be able to calculate the power dissapation.


Mark



On 23/08/18 16:20, Volker Kuhlmann wrote:
> On Thu 23 Aug 2018 13:12:13 NZST +1200, Mark Atherton wrote:
>
>> Might be useful to find out the cold resistance of your load as a
>> starting point; this will strongly affect initial inrush.
> Yes. The Omron peak currents are 5-10x rated...
>
>> ... and obviously (?) you need to size components around peak current.
> It's a heater, so not that much higher when cold.
>
> Element14 have Idec RSSDN-50A SSRs similar to those Fotek, 50A 550Vac
> %58+GST. Interestingly, their datasheet recommends a resistive max load
> of 25A, although it also says 50A continuous current is OK... I guess it
> depends on the size of heat sink one wants to put up with. At a fraction
> of the rated load the voltage drop may also be only a fraction. Omron
> lists the number of heat sink fans required in their datasheet...
>
> Volker
>