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