BC849B Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 30 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 0.25 W
• DC Current Gain (h_fe): 200 to 450
• Transition Frequency, min: 150 MHz
• Noise Figure, max: 1.2 dB
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The BC849B transistor can have a current gain of 200 to 450. The gain of the BC849 will be in the range from 110 to 800, for the BC849A it will be in the range from 110 to 220, for the BC849C it will be in the range from 420 to 800.The complementary PNP transistor to the BC849B is the BC859B.You can replace the BC849B with the 2SC1623, 2SC2412, 2SC2712, 2SC3441, 2SC3912, 2SC3913, 2SC3914, 2SC3915, 2SC4738, 2SD601A, 2STR1160, 2STR1230, BC817, BC847, BC847B, BC848, BC848B, BC850, BC850B, BCV72, BCW32, BCW65, BCW66, BCX19, FMMT619, FMMTA05, KSC1623, KST05, KTC3875, KTC3875S, MMBT100, MMBT2484, MMBT5210, MMBTA05 or SMBTA05.