It's called a fuse.
I think I must be too close to WWII.
I'm not that old by any means, but most of the people I hung out with when I was young and learned a lot from were from that era.
People had a different mindset back then. Fuses and safety equipment was important, but some things were considered more important than that.
Absolute reliability was paramount.
Life was dangerous, and you were expected to look out for yourself.
When we were building winches, the idea of shear pins or fuses would never occur to us.
Anymore than trigger locks on guns would have.
If you were stuck, quite often it was a potential life or death situation. There were no cell phones, no CBs, and many times you were by yourself.
If it was 15 degrees, you were several miles from any other person, and no one would be likely to come looking for you for hours, you better be able to get yourself out.
I ran into that situation one time in my Jeep when I was about 16. I slid off into a hole. Front end was off the ground, the the rear duals would not pull it out by themselves.
For some reason, I turned it off. Got out, unspooled the cable and hooked it to a tree.
My hands were so cold when I got back in, I could not grip the key hard enough to turn it.
I had to get out and break off two sticks and clamp the key between them to crank the jeep.
After that, it was no problem. The winch pulled me out, the little heater kept the frostbite down, and I drove home.
So, I have always been of the mindset when it comes to safety equipment like winches on trucks or anchors on boat, the most important thing is that they
work.
I expect the winch on my truck to pull until I am out or something breaks. I have no shear pin, or any kind of safety that fails first.
Of course, its hydraulic, so I can't fuse it .
A fuse on an electric winch is a great idea. If you are careful to size it properly.
But, some winches are darn near a dead short at full load stalled.
I have seen some using regular battery cables sizes smoke the cables when they stalled.
So, the fuse size has to be between the maximum a winch will draw, and the amount a battery will put out shorted.
And that can be a narrow window.
Due to my weird mindset, I would not mind putting a fuse on a winch, as long as I had a nonfused bypass just in case......
When its the difference between getting home and not, I want that winch to pull until I'm out or it breaks.
Then I know that it did its best.
Plus, don't forget 400 amp+ automotive fuses are fairly new. I don't think they made such a thing in the 60s and 70s.
If they did, I never saw or heard of one.