KSC1009CO Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 140 V
• Collector-Base Voltage, max: 160 V
• Emitter-Base Voltage, max: 8 V
• Collector Current − Continuous, max: 0.7 A
• Collector Dissipation: 0.8 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 30 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The KSC1009CO is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads. Suffix "C" means center collector in KSC1009O.
Here is an image showing the pin diagram of this transistor.The KSC1009CO transistor can have a current gain of 70 to 140. The gain of the KSC1009C will be in the range from 40 to 400, for the KSC1009CG it will be in the range from 200 to 400, for the KSC1009CR it will be in the range from 40 to 80, for the KSC1009CY it will be in the range from 120 to 240.The complementary PNP transistor to the KSC1009CO is the KSA709CO.The KST5550 (SOT-23) and MMBT5550 (SOT-23) is the SMD version of the KSC1009CO transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the KSC1009CO with the 2SC2383, 2SC3228, KSC2383 or KTC3228.