Exact OEM replacement switch, for better or worse
This appears to be an exact OEM replacement for the original switch, and SupplyHouse's price can't be beat.
That's the good news. The bad news is that given that the original switch destroyed itself (by which I mean, really, truly, INCINERATED itself) within ten months after the furnace was installed — ten months during which the door it monitors was never opened — I don't know how much I actually trust the switch itself. Honestly, I trust the jumper I put in as a temporary replacement a lot more than I trust the switch, and it's not like I'm going to be stupid enough to open that door with the furnace running anyway.