2SA1381-D Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -300 V
• Collector-Base Voltage, max: -300 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 7 W
• DC Current Gain (h_fe): 60 to 120
• Transition Frequency, min: 150 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SA1381-D transistor can have a current gain of 60 to 120. The gain of the 2SA1381 will be in the range from 40 to 320, for the 2SA1381-C it will be in the range from 40 to 80, for the 2SA1381-E it will be in the range from 100 to 200, for the 2SA1381-F it will be in the range from 160 to 320.Sometimes the "2S" prefix is not marked on the package - the 2SA1381-D might only be marked "A1381-D".The complementary NPN transistor to the 2SA1381-D is the 2SC3503-D.The 2SA1721 (SOT-23), 2SA1721-O (SOT-23), BF621 (SOT-89), BF821 (SOT-23) and PMBTA92 (SOT-23) is the SMD version of the 2SA1381-D transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA1381-D with the 2SA1156, 2SA1156L, 2SA1353, 2SA1353-D, 2SA1479, 2SA1479-D, 2SA1480, 2SA1480-D, KSA1156, KSA1156O, KSA1381, KSA1381-D, KSE350, KTA1703, KTA1703-O, MJE350 or MJE350G.