/diy/ - Do It Yourself

I had a diode(?) in my heater pop and kill the low setting and would like to fix it because I use the heater to keep myself warm when I jerk off completely nude in the winter. The part that was being used was marked "6A10 DC" and I would like to replace it with something identical, but I see none with DC on them. What is DC in this case? Is it the manufacturer? I see ones with MIC, or CY, or any other number of letterings, but no DC. I see lots of 6A10 diodes otherwise, just get one of those? I also can't remember which direction it was originally installed.