KTD2059 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: 30 W
• DC Current Gain (h_fe): 40 to 240
• Transition Frequency, min: 12 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F
• Electrically Similar to the Popular 2SD2059 transistor

Here is an image showing the pin diagram of this transistor.The KTD2059 transistor can have a current gain of 40 to 240. The gain of the KTD2059O will be in the range from 70 to 140, for the KTD2059R it will be in the range from 40 to 80, for the KTD2059Y it will be in the range from 120 to 240.The complementary PNP transistor to the KTD2059 is the KTB1367.The BDP953 (SOT-223) is the SMD version of the KTD2059 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the KTD2059 with the 2SC2334, 2SD1355, 2SD1407, 2SD1407A, 2SD2059, 2SD363, 2SD525, 2SD772, 2SD772A, 2SD792, 2SD792A, BD243C, BD539C, BD539D, BD801, BD953, BD955, BDT85, BDT85F, BDT87, BDT87F, KSC2334, KSD363, MJE15028, MJE15028G, MJE15030, MJE15030G, MJF15030, MJF15030G, TIP41D, TIP41E, TIP41F, TIP42D, TIP42E or TIP42F.