D44C6 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: -4 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 20
• Transition Frequency, min: 50 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 complementary NPN transistor to the D44C6 is the D45C6.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 D44C6 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the D44C6 with the 2N6040, 2N6040G, 2N6041, 2N6041G, 2N6107, 2N6107G, 2N6108, 2N6109, 2N6109G, 2N6110, 2N6124, 2N6125, 2N6126, 2N6133, 2N6134, 2N6490, 2N6490G, 2N6491, 2N6491G, 2N6667, 2N6667G, 2N6668, 2N6668G, 2SA1012, 2SA1012O, 2SA1012Y, 2SA1259, 2SA1262, 2SA1279, 2SA1279-O, 2SA1279-Y, 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, 2SA1931, 2SA489, 2SA489-O, 2SA489-R, 2SA489-Y, 2SA768, 2SA769, 2SA770, 2SA771, 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, 2SB1134, 2SB1134-Q, 2SB1134-R, 2SB1134-S, 2SB1135, 2SB1135-Q, 2SB1135-R, 2SB1135-S, 2SB1136, 2SB1136-Q, 2SB1136-R, 2SB1136-S, 2SB1223, 2SB1224, 2SB1225, 2SB1251, 2SB1251-P, 2SB1251-Q, 2SB1368, 2SB1368-O, 2SB1368-R, 2SB1368-Y, 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, 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, 2SB857, 2SB857-B, 2SB857-C, 2SB857-D, 2SB858, 2SB858-B, 2SB858-C, 2SB858-D, 2SB870, 2SB870-P, 2SB870-Q, 2SB870-R, 2SB880, 2SB881, 2SB882, 2SB942, 2SB942-P, 2SB942-Q, 2SB942-R, 2SB942A, 2SB942A-P, 2SB942A-Q, 2SB942A-R, 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, 2SB996, 2SB996-O, 2SB996-R, 2SB996-Y, BD202, BD204, BD244, BD244A, BD244B, BD302, BD304, BD534, BD534J, BD534K, BD536, BD536J, BD536K, BD538, BD538J, BD538K, BD540A, BD540B, BD544A, BD544B, BD546A, BD546B, BD644, BD646, BD648, BD738, BD744, BD744A, BD744B, BD796, BD798, BD800, BD808, BD810, BD896, BD896A, BD898, BD898A, BD900, BD900A, BD948, BD950, BD952, BDT60, BDT60A, BDT62, BDT62A, BDT64, BDT64A, BDT82, BDT82F, BDT84, BDT84F, BDT92, BDT92F, BDT94, BDT94F, 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, D44C11, D44C12, D44C5, D44C8, D44C9, D45C11, D45C12, D45C5, D45C6, D45C8, D45C9, D45H11, D45H11FP, D45H8, KSB1017, KSB1017-O, KSB1017-R, KSB1017-Y, KSB1097, KSB1097-O, KSB1097-R, KSB1097-Y, KSB596, KSB596-O, KSB596-R, KSB596-Y, KSB707, KSB707-O, KSB707-R, KSB707-Y, KSB708, KSB708-O, KSB708-R, KSB708-Y, KSE2955T, KTB1368, KTB1368O, KTB1368R, KTB1368Y, MJE2901T, MJE2955T, MJE2955TG, MJE700T, MJE701T, MJE702T, MJE703T, MJF2955, MJF2955G, NTE153, NTE197, TIP105, TIP105G, TIP106, TIP106G, TIP125, TIP125G, TIP126, TIP126G, TIP135, TIP135G, TIP136, TIP136G, TIP145T, TIP146T, TIP2955T, TTA1452B or TTB1452B.