2SC3303-O Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 5 A
• Collector Dissipation: 20 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-252

Here is an image showing the pin diagram of this transistor.The 2SC3303-O transistor can have a current gain of 70 to 140. The gain of the 2SC3303 will be in the range from 70 to 240, for the 2SC3303-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SC3303-O might only be marked "C3303-O".The BDP951 (SOT-223) and BDP953 (SOT-223) is the SMD version of the 2SC3303-O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC3303-O with the 2SD1256, 2SD1257, 2SD1257A, KTC2022D or KTC2022D-Y.