KTA1273 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -30 V
• Collector-Base Voltage, max: -30 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -2 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 100 to 320
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92
• Electrically Similar to the Popular 2SA1273 transistor

The KTA1273 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 KTA1273 transistor can have a current gain of 100 to 320. The gain of the KTA1273O will be in the range from 100 to 200, for the KTA1273Y it will be in the range from 160 to 320.The complementary NPN transistor to the KTA1273 is the KTC3205.The 2SA1203 (SOT-89), FMMT549 (SOT-23) and KTA1663 (SOT-89) is the SMD version of the KTA1273 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The 2SA1273 is the TO-92 version of the KTA1273.You can replace the KTA1273 with the 2SA1273, 2SA928A, 2SB1229, 2SB892, 2SB985, KSA928A, KTA1282 or STB1277.