l Characteristics at TA = 25 ˚C, unless otherwise specified. Parameter Symbol min. DC characteristics Collector-emitter breakdown voltage IC = 2 mA BCX 58 BCX 59 Collector-base breakdown voltage IC = 10 µA BCX 58 BCX 59 Emitter-base breakdown voltage IE = 1 µA Collector cutoff current VCB = 32 V VCB.