2N2904A Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -60 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.6 A
• Collector Dissipation: 0.8 W
• DC Current Gain (h_fe): 40 to 120
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The complementary NPN transistor to the 2N2904A is the 2N2218A.The PN2904A is the TO-92 version of the 2N2904A.You can replace the 2N2904A with the 2N2102, 2N2102A, 2N4036, 2N4235, 2N4236, 2N4404, 2N4406, 2N5322, 2N5323, 2N5333, 2N5679, 2N5680, 2N6190, 2N6192, 2SA510, 2SA512, BC161 or BC461.