2SA777 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -80 V
• Collector-Base Voltage, max: -80 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -0.5 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 90 to 220
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92MOD

Here is an image showing the pin diagram of this transistor.The 2SA777 transistor can have a current gain of 90 to 220. The gain of the 2SA777-Q will be in the range from 90 to 155, for the 2SA777-R it will be in the range from 130 to 220.Sometimes the "2S" prefix is not marked on the package - the 2SA777 might only be marked "A777".The complementary NPN transistor to the 2SA777 is the 2SC1509.The 2SA1202 (SOT-89), 2SA1368 (SOT-89), 2SA1620 (SOT-23), FMMTA56 (SOT-23), KST56 (SOT-23) and KTA1662 (SOT-89) is the SMD version of the 2SA777 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA777 with the 2N5401C, 2SA1275, 2SA1284, 2SA1315, 2SA1533, 2SA935, 2SA965, 2SA984K, 2SB560, 2SB647, KSA1013, KSA709C, KSA916, KTA1023, KTA1023-O, KTA1023-Y or KTA1275.