The 200 is the limit open temperature and that must match.
The characters after the - normally indicate how far the temperature has to drop before the limit closes again.
Its not critically important, but shouldn't be too low or it will reset too fast.
Normally, characters are numeric only, for example, 200-20 indicates it has to drop to 180F before the limit closes again. don't know what a9 indicates.
The issue is, using a limit that is not a direct approved replacement even if it is a good match could void safety certifications, causing problems with insurance, etc if something were to happen related to the electric furnace causing property damage.
Just to warn you, limits fail open only after opening and closing too many times.
You most likely have an underlying problem with the system - the most likely being low airflow*.
*Dirty blower wheel, plugged and/or filter too restrictive, oversized unit on undersized ducts, heating blower speed set too low, too many vents closed/blocked, etc.
So after the limit is changed, need to do further investigation to make sure it is getting proper airflow.
The wire and connector are also in poor repair, missing insulation -> must be fixed when replacing the limit.