2SD471AY Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 30 V
• Collector-Base Voltage, max: 40 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 0.8 W
• DC Current Gain (h_fe): 120 to 240
• Transition Frequency, min: 130 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SD471AY 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, base, and collector leads.
Here is an image showing the pin diagram of this transistor.The 2SD471AY transistor can have a current gain of 120 to 240. The gain of the 2SD471A will be in the range from 70 to 400, for the 2SD471AG it will be in the range from 200 to 400, for the 2SD471AO it will be in the range from 70 to 140.Sometimes the "2S" prefix is not marked on the package - the 2SD471AY might only be marked "D471AY".The complementary PNP transistor to the 2SD471AY is the 2SB564AY.The FMMT449 (SOT-23) is the SMD version of the 2SD471AY transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The KSD471AY is the TO-92 version of the 2SD471AY.You can replace the 2SD471AY with the BC537, BC537-16, KSD471A, KSD471AY, MPS650, MPS650G, MPS651, MPS651G, MPS6602, MPS6602G, MPSW01, MPSW01A, MPSW01AG, MPSW01G, PN2222A, ZTX449 or ZTX450.