2SD227Y Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 25 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.3 A
• Collector Dissipation: 0.4 W
• DC Current Gain (h_fe): 120 to 240
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SD227Y 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 2SD227Y transistor can have a current gain of 120 to 240. The gain of the 2SD227 will be in the range from 70 to 400, for the 2SD227G it will be in the range from 200 to 400, for the 2SD227O it will be in the range from 70 to 140.Sometimes the "2S" prefix is not marked on the package - the 2SD227Y might only be marked "D227Y".The complementary PNP transistor to the 2SD227Y is the 2SA642Y.The MMBT4124 (SOT-23) and MMST4124 (SOT-323) is the SMD version of the 2SD227Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The KSD227Y is the TO-92 version of the 2SD227Y.You can replace the 2SD227Y with the 2N4401, 2N5172, 2SC1210, 2SD471A, 2SD471AY, KN2222, KN2222A, KSD227, KSD227Y, KSD471A, KSD471AY, KSP2222A, KTC8050, KTC9013, KTN2222, KTN2222A, M8050, MPS2222, MPS2222A, MPS2222AG, MPS2222G, MPS3704, MPS650, MPS650G, MPS6531, MPS6532, MPS6601, MPS6601G, MPS6602, MPS6602G, MPS8050, MPSW01, MPSW01A, MPSW01AG, MPSW01G, NTE123AP, P2N2222A, P2N2222AG, PN100, PN2219, PN2219A, PN2222, PN2222A, PN3569, S8050, S9013, SS8050, ZTX449 or ZTX450.