Atlas Copco 8433-0015-20 Rapid Back Up Unit, sold as the Silver RBU, is a replacement part with Atlas Copco catalog code 8433001520. The model is listed under part number 8433-0015-20 and corresponds to the 8433001520 catalog entry. Intended as a spare or replacement Rapid Back Up Unit for Atlas Copco systems requiring an RBU component.
