BC256B Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -65 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 0.35 W
• DC Current Gain (h_fe): 180 to 460
• Transition Frequency, min: 280 MHz
• Noise Figure, max: 2 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The BC256B 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 collector, base, and emitter leads.
Here is an image showing the pin diagram of this transistor.The BC256B transistor can have a current gain of 180 to 460. The gain of the BC256 will be in the range from 120 to 500, for the BC256A it will be in the range from 120 to 220.The BC856 (SOT-23) and BC856W (SOT-323) is the SMD version of the BC256B transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC256B with the BC448, BC448B, BC450, BC450B or BC556.