Heavily loaded electric winch solenoid relays take a beating. What saves them is they are intermittent duty 600 amp rated. Much stronger coil, much stronger retractor spring.
I recently made a juiced up winch flyback filter for a forum member. But it dumps energy to chassis negative. (1) Motorola MR2535 reversed biased, two 1500 watt 16 volt TVS diodes. I also built a de-spiker for his Prestolite 160 amp Load Handler alternator, and then there were some 120vac clippers, and de-spikers for smaller alternators for some other members. Seeing stuff needlessly wasted just goes against my grain.
In 1981 I went "Ooooooo looky here!" A metal can 12 volt constant duty solenoid relay with silver INLAY contacts. Cost 400% as much as the same relay without the silver. I patiently explained to a customer that the relay MUST BE connected to ignition B, the circuit that plays possum when the key is twisted to the starter position. He nodded yes and grabbed the solenoid.
Four days later he returned. Placed the solenoid on the bench "Doesn't work" he declared. I took it apart right then and there. The silver inlays were destroyed. Molten and fragmented.
"You did connect it to the wiper motor parking power wire, right?"
"Nah.........Ignition is ignition"
The relay had boost-fed from his house batteries to the engine battery. It was rated for 80-amperes. It was supposed to be a charging circuit relay. With minimum contact resistance - voltage drop.
He wanted a cash refund. Two days later his personal check was returned marked insufficient funds.
And that...
Is why I am so grouchy about relays and solenoids.
