This has come up numerous times where almost all of the DC rated switches you see for sale aren't actually rated for over 48V DC. I believe I actually found one that comes in 400A, 500A, and 600A versions! https://evolveelectrics.com/collections/contactors/products/rincon-power-hvbd-600a-disconnect
From spec sheet it sounds like you can actually use it to disconnect under load even at full rating as long as you are below 100V DC which we always would be for a 48V nominal system.
From spec sheet it sounds like you can actually use it to disconnect under load even at full rating as long as you are below 100V DC which we always would be for a 48V nominal system.