QB – 100-150W, DC-DC Converter for Railway and Industrial Applications | Polytron 100W to 150W Railway and Industrial Applications 4:1 Input Range Low Standby Power Consumption Compact 2.28″ x 0.50″ Quater Brick Package Download data sheets Industrial QB100 (1.07 MB) QB150 (1.15 MB) Rail & Transportation QB100 (1.07 MB) QB150 (1.15 MB)