2SD1265A-P Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 80 V
• Emitter-Base Voltage, max: 8 V
• Collector Current − Continuous, max: 4 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 50 to 100
• 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 2SD1265A-P transistor can have a current gain of 50 to 100. The gain of the 2SD1265A will be in the range from 30 to 160, for the 2SD1265A-O it will be in the range from 80 to 160, for the 2SD1265A-Q it will be in the range from 30 to 60.Sometimes the "2S" prefix is not marked on the package - the 2SD1265A-P might only be marked "D1265A-P".The BDP951 (SOT-223) is the SMD version of the 2SD1265A-P transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD1265A-P with the 2N6131, 2N6473, 2N6474, 2N6488, 2N6488G, 2SC1986, 2SC2075, 2SC2334, 2SC3851A, 2SC4511, 2SC4511-O, 2SC4512, 2SC4512-O, 2SD1267A, 2SD1274, 2SD1274A, 2SD1274B, 2SD1355, 2SD1356, 2SD1407, 2SD1407A, 2SD1408, 2SD2059, 2SD2060, 2SD363, 2SD389A, 2SD389A-P, 2SD525, 2SD526, 2SD569, 2SD613, 2SD743, 2SD743A, 2SD772, 2SD792, 2SD812, 2SD823, 2SD857A, BD243B, BD243C, BD537, BD537K, BD539B, BD539C, BD539D, BD709, BD711, BD743B, BD743C, BD799, BD801, BD809, BD909, BD911, BD951, BD953, BD955, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDT93, BDT93F, BDT95, BDT95F, BDX77, KSC2334, KSD1408, KSD363, KSD526, KSD569, KTD2059, KTD2060, MJE15028, MJE15028G, MJE15030, MJE15030G, MJE5180, MJE5181, MJE5182, MJF15030, MJF15030G, MJF3055, MJF3055G, NTE152, NTE291, TIP41D, TIP41E, TIP41F, TIP42D, TIP42E or TIP42F.