KTC3211O Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 25 V
• Collector-Base Voltage, max: 40 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 1.5 A
• Collector Dissipation: 0.625 W
• DC Current Gain (h_fe): 85 to 160
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The KTC3211O 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.
Here is an image showing the pin diagram of this transistor.The KTC3211O transistor can have a current gain of 85 to 160. The gain of the KTC3211 will be in the range from 85 to 300, for the KTC3211GR it will be in the range from 160 to 300, for the KTC3211Y it will be in the range from 120 to 200.The complementary PNP transistor to the KTC3211O is the KTA1283O.The MPS8050S (SOT-23) and MPS8050S-B (SOT-23) is the SMD version of the KTC3211O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the KTC3211O with the 2SC2655 or KTC3209.