2SB1274Q Bipolar Transistor

• Type: PNP
• 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): 70 to 120
• 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 2SB1274Q transistor can have a current gain of 70 to 120. The gain of the 2SB1274 will be in the range from 70 to 280, for the 2SB1274R it will be in the range from 100 to 200, for the 2SB1274S it will be in the range from 140 to 280.Sometimes the "2S" prefix is not marked on the package - the 2SB1274Q might only be marked "B1274Q".The complementary NPN transistor to the 2SB1274Q is the 2SD1913Q.You can replace the 2SB1274Q with the 2N6107, 2N6107G, 2N6110, 2N6475, 2N6476, 2N6490, 2N6490G, 2N6491, 2N6491G, 2SA1010, 2SA1010L, 2SA1077, 2SA1262, 2SA1288, 2SA1288-Q, 2SA1289, 2SA1289-Q, 2SA1290, 2SA1290-Q, 2SA1291, 2SA1291-Q, 2SA1293, 2SA1293-O, 2SA1308, 2SA1308-O, 2SA1329, 2SA1329-O, 2SA1388, 2SA1388-O, 2SA1452, 2SA1452-O, 2SA1452A, 2SA1452A-O, 2SA1469, 2SA1469-Q, 2SA1470, 2SA1470-Q, 2SA1471, 2SA1471-Q, 2SA1488, 2SA1488A, 2SA1634, 2SA1634-D, 2SA1635, 2SA1635-D, 2SA1725, 2SA1725-P, 2SA1726, 2SA1726-P, 2SA489, 2SA489-O, 2SA768, 2SA769, 2SA770, 2SA771, 2SB1015, 2SB1015-O, 2SB1016, 2SB1016-O, 2SB1016A, 2SB1016A-O, 2SB1017, 2SB1017-O, 2SB1018, 2SB1018-O, 2SB1018A, 2SB1018A-O, 2SB1090, 2SB1097, 2SB1133, 2SB1133-Q, 2SB1187, 2SB1187-D, 2SB1366, 2SB1366-O, 2SB1367, 2SB1367-O, 2SB1368, 2SB1368-O, 2SB1548, 2SB1548-Q, 2SB1548A, 2SB1548A-Q, 2SB507, 2SB507D, 2SB566A, 2SB566A-B, 2SB595, 2SB595-O, 2SB596, 2SB596-O, 2SB633, 2SB633-D, 2SB703, 2SB703-R, 2SB703A, 2SB703A-R, 2SB707, 2SB707-O, 2SB708, 2SB708-O, 2SB747, 2SB747-Q, 2SB761, 2SB761-Q, 2SB761A, 2SB761A-Q, 2SB762, 2SB762-Q, 2SB762A, 2SB762A-Q, 2SB834, 2SB834O, 2SB858, 2SB858-B, 2SB870, 2SB870-R, 2SB941, 2SB941-Q, 2SB941A, 2SB941A-Q, 2SB942, 2SB942-Q, 2SB942A, 2SB942A-Q, 2SB945, 2SB945-R, 2SB946, 2SB946-R, 2SB992, 2SB992-O, 2SB994, 2SB994-O, 2SB995, 2SB995-O, 2SB996, 2SB996-O, BD204, BD242A, BD242B, BD242C, BD244A, BD244B, BD244C, BD304, BD536, BD538, BD540A, BD540B, BD540C, BD544A, BD544B, BD544C, BD546A, BD546B, BD546C, BD708, BD710, BD712, BD744A, BD744B, BD744C, BD798, BD800, BD802, BD808, BD810, BD908, BD910, BD912, BD936, BD936F, BD938, BD938F, BD940, BD940F, BD942, BD942F, BD950, BD952, BD954, BD956, BDT82, BDT82F, BDT84, BDT84F, BDT86, BDT86F, BDT88, BDT88F, BDT92, BDT92F, BDT94, BDT94F, BDT96, BDT96F, BDX78, D44C10, D44C11, D44C12, D44C7, D44C8, D44C9, D45C10, D45C11, D45C12, D45C7, D45C8, D45C9, D45H11, D45H11FP, D45H8, KSA1010, KSA1010O, KSB1015, KSB1015-O, KSB1017, KSB1017-O, KSB1097, KSB596, KSB596-O, KSB707, KSB707-O, KSB708, KSB708-O, KSB834, KSB834-O, KTA1038, KTA1038-O, KTA1049, KTA1049O, KTB1366, KTB1366O, KTB1367, KTB1367O, KTB1368, KTB1368O, KTB988, KTB988O, MJE15029, MJE15029G, NTE153 or NTE197.