0.5mm Hirose SMT Board to Board Double Row Connectors - DF12 SeriesDF12 series straight, SMT mounting, ultra-miniature board to board, double row header and receptacle connectors with a 0.5mm contact pitch available with a variety of stacking heights. These 0.5mm PCB mount double row connectors have a UL94V-0 polyamide body and gold plated contacts.Features and Benefits• Available with PCB retention hardware and location posts• Gold plated contactsNoteDF12 SMT Header and Receptacle connector mated stacking heights:DF12(3.0)-xxxx-xxxx have a stacking height of 3mmDF12(3.5)-xxxx-xxxx have a stacking height of 3.5mmDF12(4.0)-xxxx-xxxx have a stacking height of 4.0mmDF12(5.0)-xxxx-xxxx have a stacking height of 5.0mmIf no figure in brackets is quoted then the stacking height will be 3.5 to 5.0mm.These DF12 SMT board to board header connectors have board guide bosses and metal fittings for solder retention.