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Xringer · 11-30-14, 10:02 AM

I've never seen one that died of overheating..
But, I've seen a couple at work, that got killed when too much voltage was applied to the DC control input..

If the SSR output is connected to an inductive load, and there is set of hardware contacts in series with the load & SSR, I could see how the main triacs/SCRs could be damaged.
If the contacts make & break with an inductive load, the back EMF voltage can be pretty high..
High enough to arc over the contacts and make a mess of them..
And exceed the voltage rating of the SSR by a lot..

11-30-14, 10:02 AM	#19
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 114 Thanked 250 Times in 230 Posts	I've never seen one that died of overheating.. But, I've seen a couple at work, that got killed when too much voltage was applied to the DC control input.. If the SSR output is connected to an inductive load, and there is set of hardware contacts in series with the load & SSR, I could see how the main triacs/SCRs could be damaged. If the contacts make & break with an inductive load, the back EMF voltage can be pretty high.. High enough to arc over the contacts and make a mess of them.. And exceed the voltage rating of the SSR by a lot.. __________________ My hobby is installing & trying to repair mini-splits EPA 608 Type 1 Technician Certification ~ 5 lbs or less..