*PLUMBERSSTOCK EXPERT* responded:
We are grateful for your interest in the Mars 12793 dual motor run capacitor. Yes, it is. As confirmed by the manufacturer, this Mars 12793 is internally protected. You may want to check pages 4 and 5 of this Catalog. If you'd like to order this product, just click "Add to Cart" and put your postal code and you're ready to go. After entering your zip code, you can get an estimate of the shipping cost. Happy shopping!