KTC2018 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 100 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 5 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 70 to 240
• Transition Frequency, min: 30 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.The KTC2018 transistor can have a current gain of 70 to 240. The gain of the KTC2018-O will be in the range from 70 to 140, for the KTC2018-Y it will be in the range from 120 to 240.The complementary PNP transistor to the KTC2018 is the KTA1038.The BDP953 (SOT-223) is the SMD version of the KTC2018 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the KTC2018 with the 2SC2334, 2SD1355, 2SD1407, 2SD1407A, 2SD2059, 2SD363, 2SD525, 2SD772, 2SD772A, 2SD792, 2SD792A, 2SD866A, BD243C, BD539C, BD539D, BD543C, BD545C, BD801, BD953, BD955, BDT85, BDT85F, BDT87, BDT87F, KSC2334, KSD363, KTC2028, KTD2059, MJE15028, MJE15028G, MJE15030, MJE15030G, MJF15030, MJF15030G, TIP41D, TIP41E, TIP41F, TIP42D, TIP42E or TIP42F.