BC850B 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: 0.1 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 BC850B transistor can have a current gain of 200 to 450. The gain of the BC850 will be in the range from 110 to 800, for the BC850A it will be in the range from 110 to 220, for the BC850C it will be in the range from 420 to 800.The complementary PNP transistor to the BC850B is the BC860B.You can replace the BC850B with the 2SC1623, 2SC2412, 2SC2712, 2SC3441, 2SC3912, 2SC3913, 2SC3914, 2SC3915, 2SC4738, 2SD601A, 2STR1160, BC817, BC846, BC846B, BC847, BC847B, BCV72, BCW66, BCX19, FMMT619, FMMT620, FMMTA05, FMMTA06, KSC1623, KST05, KST06, KTC3875, KTC3875S, MMBT100, MMBT2484, MMBT5210, MMBTA05, MMBTA06, PMBTA06, SMBTA05 or SMBTA06.