KSC1009Y 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): 120 to 240
• Transition Frequency, min: 30 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92
• Electrically Similar to the Popular 2SC1009Y transistor

The KSC1009Y 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 KSC1009CY transistor (with suffix "C") is the center collector version of the KSC1009Y.
Here is an image showing the pin diagram of this transistor.The KSC1009Y transistor can have a current gain of 120 to 240. 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 KSC1009O it will be in the range from 70 to 140, for the KSC1009R it will be in the range from 40 to 80.The complementary PNP transistor to the KSC1009Y is the KSA709Y.The 2N5551S (SOT-23), DXT5551 (SOT-89), DZT5551 (SOT-223), KST5550 (SOT-23), KST5551 (SOT-23), MMBT5550 (SOT-23) and MMBT5551 (SOT-23) is the SMD version of the KSC1009Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The 2SC1009Y is the TO-92 version of the KSC1009Y.You can replace the KSC1009Y with the 2SC1009, 2SC1009Y or ZTX455.