2SD1211 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 120 V
• Collector-Base Voltage, max: 120 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.5 A
• Collector Dissipation: 1 W
• DC Current Gain (h_fe): 130 to 330
• Transition Frequency, min: 200 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92MOD

Here is an image showing the pin diagram of this transistor.The 2SD1211 transistor can have a current gain of 130 to 330. The gain of the 2SD1211-R will be in the range from 130 to 220, for the 2SD1211-S it will be in the range from 185 to 330.Sometimes the "2S" prefix is not marked on the package - the 2SD1211 might only be marked "D1211".You can replace the 2SD1211 with the 2SC3332 or KSC1009C.