The Nittany Lions used the lessons learned from last week's near-upset against No. 1 Nebraska to take down the No. 2 team in the country.
Penn State's offense could not find a breakthrough as it fell short of the tournament title.
The Badgers hadn't given up a set since October 21 before entering Rec Hall Saturday night.
The Nittany Lions lost a war of attrition with the Spartans able to outlast a fatigued defense for the win.
Kanye Clary scored 20-plus points for the second-straight game.
The Nittany Lions rallied from a two-goal deficit in the third period.