2SD261G Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 20 V
• Collector-Base Voltage, max: 40 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.5 A
• Collector Dissipation: 0.5 W
• DC Current Gain (h_fe): 200 to 400
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SD261G 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 2SD261G transistor can have a current gain of 200 to 400. The gain of the 2SD261 will be in the range from 40 to 400, for the 2SD261O it will be in the range from 70 to 140, for the 2SD261R it will be in the range from 40 to 80, for the 2SD261Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SD261G might only be marked "D261G".The complementary PNP transistor to the 2SD261G is the 2SA643G.The 2SC3326 (SOT-23), 2SC3326-A (SOT-23), KTC2875 (SOT-23) and KTC2875-A (SOT-23) is the SMD version of the 2SD261G transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The KSD261G is the TO-92 version of the 2SD261G.You can replace the 2SD261G with the 2N5172, 2SD471A, 2SD471AG, KSD261, KSD261G, KSD471A, KSD471AG, MPS3415, MPS3706, MPS650, MPS650G, MPS6532, MPS6601, MPS6601G, MPS6602, MPS6602G, MPSW01, MPSW01A, MPSW01AG or MPSW01G.