2SD526 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 4 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 40 to 240
• Transition Frequency, min: 8 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SD526 transistor can have a current gain of 40 to 240. The gain of the 2SD526-O will be in the range from 70 to 140, for the 2SD526-R it will be in the range from 40 to 80, for the 2SD526-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SD526 might only be marked "D526".The complementary PNP transistor to the 2SD526 is the 2SB596.The BDP951 (SOT-223) is the SMD version of the 2SD526 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD526 with the 2SC1986, 2SC2075, 2SC2334, 2SC3851A, 2SD1267A, 2SD1274, 2SD1274A, 2SD1274B, 2SD1355, 2SD1356, 2SD1407, 2SD1407A, 2SD1408, 2SD2059, 2SD2060, 2SD363, 2SD525, 2SD613, 2SD772, 2SD792, 2SD823, 2SD857A, BD243B, BD243C, BD537, BD539B, BD539C, BD539D, BD799, BD801, BD809, BD951, BD953, BD955, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDX77, KSC2334, KSD1408, KSD363, KSD526, KTD2059, KTD2060, MJE15028, MJE15028G, MJE15030, MJE15030G, MJF15030, MJF15030G, TIP41D, TIP41E, TIP41F, TIP42D, TIP42E or TIP42F.