t V mA A mA mW ˚C 285 215 K/W 1) Package mounted on epoxy pcb 40 mm × 40 mm × 1.5 mm/6 cm2 Cu. Semiconductor Group 2 BCW 67 BCW 68 Electrical Characteristics at TA = 25 ˚C, unless otherwise specified. Parameter Symbol min. DC characteristics Collector-emitter breakdown voltage IC = 10 mA BC.