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Generic replaces sigmatron-apllied digitaland esb 520001 ballast.
Replaces the ESB 52001 sigmatron when used for 120 volt
Replaces Applied Digital brand as well
Operates 2 lamps side by side
10 pin push on plug connector
Fits beds that have this type ballast running 120v or 230V
Non-returnable item (we cannot return them either
Please be sure your ballast is the problem
Swap good lamps to test ballast and lamp holders
Note this ballast will work on 120 volt units or can be converted to work on 230V beds
Look closely at the lead in front of the fuse
If its cut then the ballast ids set for 220v.
Contact us for help if not sure.