BD242 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -45 V
• Collector-Base Voltage, max: -55 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -3 A
• Collector Dissipation: 40 W
• DC Current Gain (h_fe): 25
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The complementary NPN transistor to the BD242 is the BD241.The 2SB1123 (SOT-89), 2SB1123-R (SOT-89), 2SB1123-S (SOT-89), 2SB1123-T (SOT-89), 2SB1123-U (SOT-89), 2SB1124 (SOT-89), 2SB1124-R (SOT-89), 2SB1124-S (SOT-89), 2SB1124-T (SOT-89) and 2SB1124-U (SOT-89) is the SMD version of the BD242 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the BD242 with the 2N6040, 2N6040G, 2N6041, 2N6041G, 2N6107, 2N6107G, 2N6108, 2N6109, 2N6109G, 2N6110, 2N6124, 2N6125, 2N6126, 2N6667, 2N6667G, 2N6668, 2N6668G, 2SA1012, 2SA1012O, 2SA1012Y, 2SA1258, 2SA1259, 2SA1262, 2SA1279, 2SA1279-O, 2SA1279-Y, 2SA1288, 2SA1288-Q, 2SA1288-R, 2SA1288-S, 2SA1289, 2SA1289-Q, 2SA1289-R, 2SA1289-S, 2SA1290, 2SA1290-Q, 2SA1290-R, 2SA1290-S, 2SA1291, 2SA1291-Q, 2SA1291-R, 2SA1291-S, 2SA1293, 2SA1293-O, 2SA1293-Y, 2SA1307, 2SA1307-O, 2SA1307-Y, 2SA1308, 2SA1308-O, 2SA1308-Y, 2SA1328, 2SA1328-O, 2SA1328-Y, 2SA1329, 2SA1329-O, 2SA1329-Y, 2SA1388, 2SA1388-O, 2SA1388-Y, 2SA1451, 2SA1451-O, 2SA1451-Y, 2SA1451A, 2SA1451A-O, 2SA1451A-Y, 2SA1452, 2SA1452-O, 2SA1452-Y, 2SA1452A, 2SA1452A-O, 2SA1452A-Y, 2SA1469, 2SA1469-Q, 2SA1469-R, 2SA1469-S, 2SA1470, 2SA1470-Q, 2SA1470-R, 2SA1470-S, 2SA1471, 2SA1471-Q, 2SA1471-R, 2SA1471-S, 2SA1488, 2SA1488A, 2SA1634, 2SA1634-D, 2SA1634-E, 2SA1634-F, 2SA1635, 2SA1635-D, 2SA1635-E, 2SA1635-F, 2SA1725, 2SA1725-O, 2SA1725-P, 2SA1725-Y, 2SA1726, 2SA1726-O, 2SA1726-P, 2SA1726-Y, 2SA1742, 2SA1742-K, 2SA1742-L, 2SA1742-M, 2SA1743, 2SA1743-K, 2SA1743-L, 2SA1743-M, 2SA1744, 2SA1744-K, 2SA1744-L, 2SA1744-M, 2SA1869, 2SA1869O, 2SA1869Y, 2SA1931, 2SA489, 2SA489-O, 2SA489-R, 2SA489-Y, 2SA614, 2SA614O, 2SA614R, 2SA614Y, 2SA671, 2SA671-A, 2SA671-B, 2SA671-C, 2SA768, 2SA769, 2SA770, 2SA771, 2SB1015, 2SB1015-O, 2SB1015-Y, 2SB1017, 2SB1017-O, 2SB1017-R, 2SB1017-Y, 2SB1018, 2SB1018-O, 2SB1018-Y, 2SB1018A, 2SB1018A-O, 2SB1018A-Y, 2SB1019, 2SB1019-O, 2SB1019-Y, 2SB1024, 2SB1097, 2SB1097-K, 2SB1097-L, 2SB1097-M, 2SB1133, 2SB1133-Q, 2SB1133-R, 2SB1133-S, 2SB1134, 2SB1134-Q, 2SB1134-R, 2SB1134-S, 2SB1135, 2SB1135-Q, 2SB1135-R, 2SB1135-S, 2SB1136, 2SB1136-Q, 2SB1136-R, 2SB1136-S, 2SB1185, 2SB1185D, 2SB1185E, 2SB1185F, 2SB1187, 2SB1187-D, 2SB1187-E, 2SB1187-F, 2SB1223, 2SB1224, 2SB1225, 2SB1250, 2SB1250-P, 2SB1250-Q, 2SB1251, 2SB1251-P, 2SB1251-Q, 2SB1274, 2SB1274Q, 2SB1274R, 2SB1274S, 2SB1299, 2SB1299P, 2SB1299Q, 2SB1366, 2SB1366-O, 2SB1366-Y, 2SB1368, 2SB1368-O, 2SB1368-R, 2SB1368-Y, 2SB1375, 2SB1548, 2SB1548-P, 2SB1548-Q, 2SB1548A, 2SB1548A-P, 2SB1548A-Q, 2SB1565, 2SB1565-E, 2SB1565-F, 2SB1566, 2SB1566-E, 2SB1566-F, 2SB434, 2SB434O, 2SB434R, 2SB434Y, 2SB507, 2SB507C, 2SB507D, 2SB507E, 2SB507F, 2SB553, 2SB553-O, 2SB553-Y, 2SB565, 2SB565-B, 2SB565-C, 2SB566, 2SB566-B, 2SB566-C, 2SB566A, 2SB566A-B, 2SB566A-C, 2SB596, 2SB596-O, 2SB596-R, 2SB596-Y, 2SB633, 2SB633-C, 2SB633-D, 2SB633-E, 2SB633-F, 2SB674, 2SB675, 2SB703, 2SB703-Q, 2SB703-R, 2SB703-S, 2SB707, 2SB707-O, 2SB707-R, 2SB707-Y, 2SB708, 2SB708-O, 2SB708-R, 2SB708-Y, 2SB747, 2SB747-P, 2SB747-Q, 2SB747-R, 2SB751, 2SB751-P, 2SB751-Q, 2SB751-R, 2SB751A, 2SB751A-P, 2SB751A-Q, 2SB751A-R, 2SB761, 2SB761-P, 2SB761-Q, 2SB761-R, 2SB761A, 2SB761A-P, 2SB761A-Q, 2SB761A-R, 2SB762, 2SB762-P, 2SB762-Q, 2SB762-R, 2SB762A, 2SB762A-P, 2SB762A-Q, 2SB762A-R, 2SB824, 2SB824-Q, 2SB824-R, 2SB824-S, 2SB825, 2SB825-Q, 2SB825-R, 2SB825-S, 2SB826, 2SB826-Q, 2SB826-R, 2SB826-S, 2SB834, 2SB834GR, 2SB834O, 2SB834Y, 2SB857, 2SB857-B, 2SB857-C, 2SB857-D, 2SB858, 2SB858-B, 2SB858-C, 2SB858-D, 2SB870, 2SB870-P, 2SB870-Q, 2SB870-R, 2SB880, 2SB881, 2SB882, 2SB941, 2SB941-P, 2SB941-Q, 2SB941A, 2SB941A-P, 2SB941A-Q, 2SB942, 2SB942-P, 2SB942-Q, 2SB942-R, 2SB942A, 2SB942A-P, 2SB942A-Q, 2SB942A-R, 2SB943, 2SB943-P, 2SB943-Q, 2SB944, 2SB944-P, 2SB944-Q, 2SB945, 2SB945-P, 2SB945-Q, 2SB945-R, 2SB946, 2SB946-P, 2SB946-Q, 2SB946-R, 2SB950, 2SB950-P, 2SB950-Q, 2SB950A, 2SB950A-P, 2SB950A-Q, 2SB951, 2SB951-P, 2SB951-Q, 2SB951A, 2SB951A-P, 2SB951A-Q, 2SB992, 2SB992-O, 2SB992-Y, 2SB993, 2SB993-O, 2SB993-Y, 2SB994, 2SB994-O, 2SB994-Y, 2SB996, 2SB996-O, 2SB996-R, 2SB996-Y, BD202, BD204, BD242A, BD242B, BD244, BD244A, BD244B, BD302, BD304, BD534, BD534J, BD534K, BD536, BD536J, BD536K, BD538, BD538J, BD538K, BD540A, BD540B, BD544A, BD544B, BD546A, BD546B, BD644, BD646, BD648, BD738, BD796, BD798, BD800, BD808, BD810, BD896, BD896A, BD898, BD898A, BD900, BD900A, BD934, BD934F, BD936, BD936F, BD938, BD938F, BD948, BD950, BD952, BDT60, BDT60A, BDT62, BDT62A, BDT64, BDT64A, BDT82, BDT82F, BDT84, BDT84F, BDW24, BDW24A, BDW24B, BDW44, BDW45, BDW46, BDW46G, BDW54, BDW54A, BDW54B, BDW64, BDW64A, BDW64B, BDW74, BDW74A, BDW74B, BDW94, BDW94A, BDW94B, BDX34, BDX34A, BDX34B, BDX34BG, BDX54, BDX54A, BDX54B, BDX54BG, BDX78, D45H11, D45H11FP, D45H8, KSA614, KSA614O, KSA614R, KSA614Y, KSB1015, KSB1015-O, KSB1015-Y, KSB1017, KSB1017-O, KSB1017-R, KSB1017-Y, KSB1097, KSB1097-O, KSB1097-R, KSB1097-Y, KSB1366, KSB1366-G, KSB1366-Y, KSB596, KSB596-O, KSB596-R, KSB596-Y, KSB707, KSB707-O, KSB707-R, KSB707-Y, KSB708, KSB708-O, KSB708-R, KSB708-Y, KSB834, KSB834-O, KSB834-Y, KTA1036, KTA1036-GR, KTA1036-Y, KTA1046GR, KTA1046Y, KTB1366, KTB1366O, KTB1366Y, KTB1368, KTB1368O, KTB1368R, KTB1368Y, KTB988, KTB988GR, KTB988O, KTB988Y, MJE2901T, MJE700T, MJE701T, MJE702T, MJE703T, NTE153, NTE197, TIP105, TIP105G, TIP106, TIP106G, TIP125, TIP125G, TIP126, TIP126G, TIP135, TIP135G, TIP136, TIP136G, TIP145T, TIP146T, TTA1452B or TTB1452B.