Vishay 357b series 1w 78 control potentiometers single turn bushing mount vishay 357b0503mxb251p12 a 50k 1w potentiometer with a 22mm diameter body and 635mm diameter shaft compact size advanced design technology and long lifetime makes this potentiometer suitable for a wide range of industrial applications vishay 357b0503mxb251p12 357b series 50k 1w conductive plastic potentiometer