BC490B Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 160 to 400
• Transition Frequency, min: 75 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The BC490B 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 BC490B transistor can have a current gain of 160 to 400. The gain of the BC490 will be in the range from 60 to 400, for the BC490A it will be in the range from 100 to 250, for the BC490L it will be in the range from 60 to 150.The complementary NPN transistor to the BC490B is the BC489B.The 2SB805 (SOT-89), 2SD1006 (SOT-89), FMMTA56 (SOT-23), KST56 (SOT-23), MMBTA56 (SOT-23), PMBTA56 (SOT-23), PZTA56 (SOT-223) and SMBTA56 (SOT-23) is the SMD version of the BC490B transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.