KSC1009O 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
• Electrically Similar to the Popular 2SC1009O transistor

The KSC1009O 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, base, and collector leads. The KSC1009CO transistor (with suffix "C") is the center collector version of the KSC1009O.
Here is an image showing the pin diagram of this transistor.The KSC1009O transistor can have a current gain of 70 to 140. The gain of the KSC1009 will be in the range from 40 to 400, for the KSC1009G it will be in the range from 200 to 400, for the KSC1009R it will be in the range from 40 to 80, for the KSC1009Y it will be in the range from 120 to 240.The complementary PNP transistor to the KSC1009O is the KSA709O.The KST5550 (SOT-23) and MMBT5550 (SOT-23) is the SMD version of the KSC1009O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The 2SC1009O is the TO-92 version of the KSC1009O.You can replace the KSC1009O with the 2SC1009 or 2SC1009O.