BC817 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 45 V
• Collector-Base Voltage, max: 50 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.5 A
• Collector Dissipation: 0.25 W
• DC Current Gain (h_fe): 100 to 600
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: SOT-23
• Electrically Similar to the Popular BC337 transistor

Here is an image showing the pin diagram of this transistor.The BC817 transistor can have a current gain of 100 to 600. The gain of the BC817-16 will be in the range from 100 to 250, for the BC817-25 it will be in the range from 160 to 400, for the BC817-40 it will be in the range from 250 to 600.The complementary PNP transistor to the BC817 is the BC807.The BC337 is the TO-92 version of the BC817.You can replace the BC817 with the 2SC3912, 2SC3913, 2SC3914, 2SC3915, BCW66, BCX19, FMMT619, FMMTA05, FMMTA06, KST05, KST06, MMBTA05, MMBTA06, PMBTA06, SMBTA05 or SMBTA06.