Not many DIP pins that could handle 20 Amps, so such a device would need a lot of pins in parallel. But if you just need a through-hole product, look at https://amploc.com/ You'll need to add your own current conductor though.
Everything tends to get smaller these days. That's unfortunate in many cases. DIP's are easier to work with for the hobby side of the field. I prefer DIP's too for many things, and only SMD for some things. Too bad though many devices only come in SMD types these days.
Yes John and it's good you are telling people here that information. But unfortunately they dont magically jump from the shipping package to the board and solder themselves onto the board. We still have to go through the soldering phase which can be hard to do with those very small pitch IC pins. I dont mind the 0.05 inch pitch too much i guess but anything smaller gets to be a headache.