2SA812-M4 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -50 V
• Collector-Base Voltage, max: -60 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.1 A
• Collector Dissipation: 0.2 W
• DC Current Gain (h_fe): 90 to 180
• Transition Frequency, min: 180 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: SOT-23

Here is an image showing the pin diagram of this transistor.The 2SA812-M4 transistor can have a current gain of 90 to 180. The gain of the 2SA812 will be in the range from 90 to 600, for the 2SA812-M3 it will be in the range from 60 to 90, for the 2SA812-M5 it will be in the range from 135 to 270, for the 2SA812-M6 it will be in the range from 200 to 400, for the 2SA812-M7 it will be in the range from 300 to 600.The 2SA812-M4 transistor is marked as "M4".You can replace the 2SA812-M4 with the 2SA1162, 2SA1313, 2SA1366, 2SA1366-D, 2SA1518, 2SA1519, 2SA1520, 2SA1521, 2SA1620, 2SA1832, 2SB710A, FMMTA55, FMMTA56, KSA812, KSA812-O, KST55, KST56, KTA1504, KTA1504S, MMBT4354 or MMBT4356.