KSD227Y 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
• Electrically Similar to the Popular 2SD227Y transistor

The KSD227Y 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 KSD227Y transistor can have a current gain of 120 to 240. The gain of the KSD227 will be in the range from 70 to 400, for the KSD227G it will be in the range from 200 to 400, for the KSD227O it will be in the range from 70 to 140.The complementary PNP transistor to the KSD227Y is the KSA642Y.The MMBT4124 (SOT-23) and MMST4124 (SOT-323) is the SMD version of the KSD227Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The 2SD227Y is the TO-92 version of the KSD227Y.You can replace the KSD227Y with the 2N4401, 2N5172, 2SC1210, 2SD227, 2SD227Y, 2SD471A, 2SD471AY, KN2222, KN2222A, 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.