He is killed by a steam pipe explosion during the heist on the Company’s headquarters. He does not die a villain. He does not die a coward. He dies a man who, in his final hour, finally chose to be something greater than a bully.
To address the core question immediately: His death occurs in Season 4, Episode 10: "The Legend." It is a permanent, canonical death. The character does not return as a series regular after this episode (though flashbacks occur). does bellick die in prison break patched
Throughout the series, Bellick's storyline becomes increasingly entangled with the main plot. He grows more and more obsessed with capturing the escapees, which puts him at odds with his fellow corrections officers and the authorities. He is killed by a steam pipe explosion