Download the QCB50A60 datasheet PDF.
This datasheet also includes the QCB50A40 variant, as both parts are published together in a single manufacturer document.
www.DataSheet4U.com TRANSISTOR MODULE QCA50B/QCB50A40/60
UL;E76102 M QCA50B and QCB50A are dual Darlington power transistor modules which have series-connected high speed, high power Darlington.