2SA990F 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: 0.25 W
• DC Current Gain (h_fe): 300 to 600
• Transition Frequency, min: 180 MHz
• Operating and Storage Junction Temperature Range: -55 to +125 °C
• Package: TO-92

The 2SA990F is manufactured in a plastic TO-92 case. When looking at the flat side with the leads pointed downward, the three leads emerging from the transistor are, from left to right, the emitter, collector, and base leads.
Here is an image showing the pin diagram of this transistor.The 2SA990F transistor can have a current gain of 300 to 600. The gain of the 2SA990 will be in the range from 200 to 800, for the 2SA990E it will be in the range from 400 to 800, for the 2SA990P it will be in the range from 200 to 400.Sometimes the "2S" prefix is not marked on the package - the 2SA990F might only be marked "A990F".The complementary NPN transistor to the 2SA990F is the 2SC1843F.The 2SA812 (SOT-23), 2SA812-M7 (SOT-23), KSA812 (SOT-23) and KSA812-L (SOT-23) is the SMD version of the 2SA990F transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SA990F with the 2SA1025, 2SA1081, 2SA1083, 2SA1084, 2SA1127, 2SA1175, 2SA1175-KF, 2SA1316, 2SA1522, 2SA1523, 2SA1524, 2SA1525, 2SA1526, 2SA1527, 2SA1528, 2SA1529, 2SA733, 2SA733K, 2SA991, 2SA991F, 2SB1116, 2SB1116-U, 2SB1116A-U, 2SB726, A733, A733K, H733, H733-K, KSA733C, KSB1116, KSB1116-L, KSB1116S or KSB1116S-L.