2N3947 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 40 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 0.2 A
• Collector Dissipation: 0.36 W
• DC Current Gain (h_fe): 100 to 300
• Operating and Storage Junction Temperature Range: -65 to +200 °C
• Package: TO-18

Here is an image showing the pin diagram of this transistor.The complementary PNP transistor to the 2N3947 is the 2N3251.The 2SC1623 (SOT-23), 2SC2712 (SOT-23), 2SC4116 (SOT-323), 2SC4738 (SOT-23), FJX3904 (SOT-323), FJX945 (SOT-323), FMMT3904 (SOT-23), KN3904S (SOT-23), KSC1623 (SOT-23), KST3904 (SOT-23), KTC3875 (SOT-23), KTC3875S (SOT-23), MMBT3904 (SOT-23), MMBT3904L (SOT-23), MMBT3904LT1 (SOT-23), MMBT3904LT1G (SOT-23), MMBT3904LT3 (SOT-23), MMBT3904LT3G (SOT-23), MMBT3904T (SOT-523F), MMBT3904TT1 (SOT-416), MMBT3904TT1G (SOT-416), MMBT3904WT1 (SOT-323), MMBT3904WT1G (SOT-323), MMST3904 (SOT-323), PMBS3904 (SOT-23), PMBT3904 (SOT-23), PMST3904 (SOT-323), PZT3904 (SOT-223) and TMBT3904 (SOT-23) is the SMD version of the 2N3947 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2N3947 with the 2N2221A, 2N2222A or NTE123A.