Campbell beat Tomasz Kuszczak the Brighton keeper and Derby striker Jamie Ward to the trophy.
Congratualtions to Fraizer.
Commenting from npower, Partnership and Sponsorship Manager Katy Thomas said: "It was clearly a very happy month for both winners [in the Championship].
"I'm sure Watford fans will be looking for more of the same to really add weight to their promotion hopes, while Cardiff City fans will be hoping that Campbell's non-stop goals will push them over the finishing line in the race for promotion."
The Manager of the month for February was won by Gianfranco Zola of Watford.