BC301-4 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 90 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 0.5 A
• Collector Dissipation: 0.85 W
• DC Current Gain (h_fe): 40 to 80
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -65 to +175 °C
• Package: TO-39

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the BC301-4 is the BC303-4.You can replace the BC301-4 with the 2N1893, 2N3020, 2N3108, 2N3498, 2N4030, 2N4031, 2N4238, 2N4239, 2N5152, 2N5320, 2N5321, 2N5334, 2N5335, 2N5336, 2N5338, 2N5681, 2N5682, 2SC108A, 2SC108A-R, 2SC503, 2SC503-R, 2SC504, 2SC504-R, 2SC510, 2SC510-R, 2SC512, 2SC512-R, BC141, BC141-6, BC300, BC300-4, BC301 or BC441.