BC546 vs BC547/BC549 Fairchild Datasheet tells you all about BC54x family of transistors High Voltage: BC546, VCEO=65V Low Noise: BC549, BC550 VCEO Collector-Emitter Voltage : BC546 : 65V BC547/550 : 45V BC548/549: 30V BC546/547/548/549/550 is made from the same process (the same silicon die) but just different screening based on...
