KTA1661 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -120 V
• Collector-Base Voltage, max: -120 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.8 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 80 to 240
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-89

Here is an image showing the pin diagram of this transistor.The KTA1661 transistor can have a current gain of 80 to 240. The gain of the KTA1661O will be in the range from 80 to 160, for the KTA1661Y it will be in the range from 120 to 240.The complementary NPN transistor to the KTA1661 is the KTC4373.You can replace the KTA1661 with the 2SA1201.