How can I render an SSD permanently inoperable with no chance of data recovery?

With any device, completely physically destroying it would work. For example, dumping a load of thermite on top, or throwing it into an incinerator. Unfortunately, unlike HDDs, drilling a couple of holes randomly likely won't work - but if you can locate the flash chips, you can smash those up.

Apart from that, SSDs all (to the best of my knowledge, though it is difficult to confirm without testing) implement the ATA secure erase command (or its SCSI equivalent), which can be sent to cause the firmware to erase all data.

I found a couple of solutions that are destructive to .375 particle size. The "Crushers" are not cheap, but if info destruction is required, this looks like a way to do it without setting the drives on fire.

This looks like it will do for a desk top situation with low volume SSD- Hard Drive Crushers - CUI / Commercial Use.

And this one is more costly, but at .375 particle size:

To avoid RSI, fumes or electric shocks, I suggest buying a blender to shred the cards.

These are always fun: What Happens When You Blend A PS2 Memory Card?

Funny yes. But considering the cards are too small for normal office shredders - probably the practical solution.