The difference in model numbers within the 0523 series has to do with the following variables...

Voltage,
Frequency,
Thermal Protection - Yes/No,
Regulatory Approvals, &
Accessories like, gages & filters.

I don't see your model number on their website. You may have typo'd it OR It may have been replaced. I bought the Gast 0523-101Q-G588NDX which is a plain-no-frills model and have been very happy with it. This one should be very, very similar to yours given you are using 110 or 220 voltage and 60 Hz. Keep in mind that they come wired for one voltage and may need to be rewired to fit your needs. It is easy to do and the diagram is on the name plate...you just need to make sure it's wired properly before you plug it in.


Fish on!,
Noel