2SB544E Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -25 V
• Collector-Base Voltage, max: -25 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -1 A
• Collector Dissipation: 0.9 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 180 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 2SB544E transistor can have a current gain of 100 to 200. The gain of the 2SB544 will be in the range from 60 to 560, for the 2SB544D it will be in the range from 60 to 120, for the 2SB544F it will be in the range from 160 to 320, for the 2SB544G it will be in the range from 280 to 560.Sometimes the "2S" prefix is not marked on the package - the 2SB544E might only be marked "B544E".The complementary NPN transistor to the 2SB544E is the 2SD400E.The 2SA1298 (SOT-23), 2SA1298-O (SOT-23), 2SB766 (SOT-89), BC808 (SOT-23), BC808-16 (SOT-23), BC808-16W (SOT-323), BC808W (SOT-323), KSA1298 (SOT-23) and KSA1298-O (SOT-23) is the SMD version of the 2SB544E transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SB544E with the 2SA1012, 2SA1279, 2SA1305, 2SA1307, 2SA1328, 2SA1451, 2SA1451A, 2SA1869, 2SA1931, 2SA473, 2SA490, 2SA671, 2SA671-C, 2SA748, 2SA754, 2SA754-C, 2SA755, 2SA755-C, 2SB1019, 2SB1134, 2SB1134-R, 2SB1135, 2SB1135-R, 2SB1136, 2SB1136-R, 2SB1185, 2SB1185E, 2SB1566, 2SB1566-E, 2SB434, 2SB435, 2SB511, 2SB511-E, 2SB514, 2SB514E, 2SB553, 2SB565, 2SB565-C, 2SB566, 2SB566-C, 2SB632, 2SB632-E, 2SB632K, 2SB632K-E, 2SB824, 2SB824-R, 2SB825, 2SB825-R, 2SB826, 2SB826-R, 2SB857, 2SB857-C, 2SB903, 2SB903-R, 2SB919, 2SB919-R, 2SB947A, 2SB948A, 2SB953A, 2SB993, BD202, BD240, BD242, BD244, BD302, BD534, BD540, BD544, BD546, BD734, BD736, BD738, BD796, BD934, BD934F, BD946, BD948, BDT30, D44C1, D44C2, D44C3, D44C4, D44C5, D44C6, D45C1, D45C2, D45C3, D45C4, D45C5, D45C6, KSA473, KTA1276 or KTA1658.