BCX19 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: 0.3 W
• DC Current Gain (h_fe): 100 to 600
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The BCX19 transistor is marked as "U1".The complementary PNP transistor to the BCX19 is the BCX17.You can replace the BCX19 with the 2SC3912, 2SC3913, 2SC3914, 2SC3915, BC817, BCW66, FMMT619, FMMTA05, FMMTA06, KST05, KST06, MMBTA05, MMBTA06, PMBTA06, SMBTA05 or SMBTA06.