Timeline for SSR firing problems
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Dec 26, 2022 at 23:39 | comment | added | Vlad | I wish I could just open one for the heck of it and see what's inside, but they are extremely well glued, and I honestly just want a working solution and as little tinkering as possible. In recent years I dont find myself enjoying fixing such things, I prefer to buy a proper part that will just work. And I understand that this isnt the correct part now, for my applicatio. However, when I google MOSFET based SSR, it doesn't give any reasonable results to me. Seems like manufacturers dont even mention this spec at all, at least on amazon etc. | |
| Dec 26, 2022 at 23:36 | comment | added | Vlad | This is a LLIRD relay directly from Chinese big manufacturer, not from public market in USA. Its a very good quality relay and I have already spoken to manufacturer directly, and they confirmed that current is too low. So I never asked to diagnose my existing relay here, but just suggest a solution around it, either a load or another SSR. I also have around 100 of those relays and I tested 5, so I know SSR isn't defective, they just perform as designed, current is just too low. Also good to know about TRIACS etc, I guess TRIAC is my case then, thanks for the explanation! | |
| Dec 26, 2022 at 23:32 | comment | added | Jonathan S. | We really can't find out what exactly the problem is if you don't tell us which SSR you're using. Most SSRs are also not based on MOSFETs, but on thyristors / TRIACs, which have a minimum holding current. MOSFET-based SSRs can operate down to 0A. | |
| Dec 26, 2022 at 23:30 | comment | added | Vlad | Hi Johnathan, there are not many ways to hook up an SSR, and I don't really want to draw that. Its a basic connection, I hooked these up many times, but never to a 0.18A pump. I hoped experienced folks over there would just guide me in a direction to a correct part or keyword, no way that such low current SSR doesn't exist, it's just hard to find on google based on just description of what I need and I dont see minimum current mentioned anywhere on those relays online. And AFAIK all SSR are based on MOSFET, hence the name - solid state. Mosfet, optocoupler, etc. Basic architecture for that. | |
| Dec 26, 2022 at 22:52 | answer | added | TimWescott | timeline score: 2 | |
| Dec 26, 2022 at 22:47 | comment | added | Jonathan S. | Welcome to the site. Would you mind giving us the datasheet of your SSR, as well as a schematic showing how you're hooking everything up? | |
| S Dec 26, 2022 at 22:35 | review | First questions | |||
| Dec 26, 2022 at 23:56 | |||||
| S Dec 26, 2022 at 22:35 | history | asked | Vlad | CC BY-SA 4.0 |