Operating and Storage Junction Temperature Range: -55 to +150 °C
Package: TO-92
Pinout of BC259A
The BC259A is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads. Here is an image showing the pin diagram of this transistor.
Classification of hFE
The BC259A transistor can have a current gain of 110 to 220. The gain of the BC259 will be in the range from 110 to 800, for the BC259B it will be in the range from 200 to 450, for the BC259C it will be in the range from 420 to 800.
Complementary NPN transistor
The complementary NPN transistor to the BC259A is the BC169A.