2SD1913S Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 6 V
• Collector Current − Continuous, max: 3 A
• Collector Dissipation: 20 W
• DC Current Gain (h_fe): 140 to 280
• Transition Frequency, min: 100 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 2SD1913S transistor can have a current gain of 140 to 280. The gain of the 2SD1913 will be in the range from 70 to 280, for the 2SD1913Q it will be in the range from 70 to 120, for the 2SD1913R it will be in the range from 100 to 200.Sometimes the "2S" prefix is not marked on the package - the 2SD1913S might only be marked "D1913S".The complementary PNP transistor to the 2SD1913S is the 2SB1274S.The BDP949 (SOT-223) is the SMD version of the 2SD1913S transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD1913S with the 2SC1826, 2SC1985, 2SC1986, 2SC2075, 2SC3179, 2SC3252, 2SC3252-S, 2SC3253, 2SC3253-S, 2SC3254, 2SC3254-S, 2SC3255, 2SC3255-S, 2SC3746, 2SC3746-S, 2SC3747, 2SC3747-S, 2SC3748, 2SC3748-S, 2SC3851, 2SC3851A, 2SC4007, 2SC4008, 2SC4550, 2SC4551, 2SC4552, 2SD1134, 2SD1266, 2SD1266A, 2SD1274, 2SD1274A, 2SD1274B, 2SD1354, 2SD1406, 2SD1666, 2SD1666-S, 2SD1761, 2SD2012, 2SD2061, 2SD2394, 2SD313, 2SD613, 2SD823, 2SD880, BD203, BD241A, BD241B, BD241C, BD243A, BD243B, BD243C, BD303, BD535, BD537, BD539A, BD539B, BD539C, BD539D, BD543A, BD543B, BD543C, BD545A, BD545B, BD545C, BD797, BD799, BD801, BD807, BD809, BD949, BD951, BD953, BD955, BDT81, BDT81F, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDX77, D44H11, D44H11FP, D44H8, KSD1406, KSD2012, KSD2058, KSD880, KTC2016, KTC2026, KTD1351, MJE15028, MJE15028G, TIP41D or TIP42D.