BC258C Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -25 V
• Collector-Base Voltage, max: -30 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 0.3 W
• DC Current Gain (h_fe): 420 to 800
• Transition Frequency, min: 180 MHz
• Noise Figure, max: 2 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The BC258C 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.The BC258C transistor can have a current gain of 420 to 800. The gain of the BC258 will be in the range from 110 to 800, for the BC258A it will be in the range from 110 to 220, for the BC258B it will be in the range from 200 to 450.The complementary NPN transistor to the BC258C is the BC168C.The BC858 (SOT-23), BC858C (SOT-23), BC858CW (SOT-323), BC858W (SOT-323), BC859 (SOT-23), BC859C (SOT-23), BC859CW (SOT-323) and BC859W (SOT-323) is the SMD version of the BC258C transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BC258C with the 2SA1287, 2SA1287-G, 2SA1522, 2SA1523, 2SA1524, 2SA1525, 2SA1526, 2SA1527, 2SA1528, 2SA1529, 2SA628, 2SA628-G, 2SA990, 2SA990E, BC257, BC257C, MPS3638, MPS3638A, PN3638 or PN3638A.