2SD855-R Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 40 to 90
• 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 2SD855-R transistor can have a current gain of 40 to 90. The gain of the 2SD855 will be in the range from 40 to 250, for the 2SD855-Q it will be in the range from 70 to 150.Sometimes the "2S" prefix is not marked on the package - the 2SD855-R might only be marked "D855-R".The complementary PNP transistor to the 2SD855-R is the 2SB760-R.The BCP55 (SOT-223) and BSR40 (SOT-89) is the SMD version of the 2SD855-R transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD855-R with the 2N5293, 2N5294, 2N5496, 2N6122, 2N6130, 2N6131, 2N6292, 2N6292G, 2N6293, 2N6473, 2N6474, 2N6477, 2N6487, 2N6487G, 2N6488, 2N6488G, 2SC1826, 2SC1985, 2SC1986, 2SC2075, 2SC2078, 2SC2233, 2SC2331, 2SC2334, 2SC3179, 2SC3851, 2SC3851A, 2SC789, 2SD1265, 2SD1265A, 2SD1267, 2SD1267-R, 2SD1267A, 2SD1267A-R, 2SD1274, 2SD1274A, 2SD1274B, 2SD1355, 2SD1356, 2SD1407, 2SD1407A, 2SD1408, 2SD1568, 2SD1588, 2SD2059, 2SD2060, 2SD313, 2SD362, 2SD363, 2SD389, 2SD389A, 2SD525, 2SD526, 2SD568, 2SD569, 2SD613, 2SD743, 2SD743A, 2SD812, 2SD823, 2SD856, 2SD856-R, 2SD856A, 2SD856A-R, 2SD857, 2SD857-R, 2SD857A, 2SD857A-R, BD203, BD239A, BD239B, BD239C, BD241A, BD241B, BD241C, BD243A, BD243B, BD243C, BD303, BD535, BD535K, BD537, BD537K, BD539A, BD539B, BD539C, BD539D, BD707, BD709, BD711, BD743A, BD743B, BD743C, BD797, BD799, BD801, BD807, BD809, BD907, BD909, BD911, BD935, BD935F, BD937, BD937F, BD939, BD939F, BD941, BD941F, BD949, BD951, BD953, BD955, BDT29A, BDT29B, BDT29C, BDT81, BDT81F, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDT91, BDT91F, BDT93, BDT93F, BDT95, BDT95F, BDX77, KSC2334, KSD1408, KSD1588, KSD362, KSD363, KSD526, KSD568, KSD569, KTC1003, KTD2059, KTD2060, MJE15028, MJE15028G, MJE2801T, MJE3055T, MJE3055TG, MJE5180, MJF3055, MJF3055G, NTE152, NTE196, TIP41D or TIP42D.