2SC945K Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 50 V
• Collector-Base Voltage, max: 60 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.1 A
• Collector Dissipation: 0.25 W
• DC Current Gain (h_fe): 300 to 600
• Transition Frequency, min: 150 MHz
• Noise Figure, max: 0.8 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SC945K 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, collector, and base leads.
Here is an image showing the pin diagram of this transistor.The 2SC945K transistor can have a current gain of 300 to 600. The gain of the 2SC945 will be in the range from 90 to 600, for the 2SC945P it will be in the range from 200 to 400, for the 2SC945Q it will be in the range from 135 to 270, for the 2SC945R it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SC945K might only be marked "C945K".The complementary PNP transistor to the 2SC945K is the 2SA733K.The 2SC1623 (SOT-23), 2SC1623-L7 (SOT-23), KSC1623 (SOT-23), KSC1623-L (SOT-23), KST2484 (SOT-23) and PMBT6428 (SOT-23) is the SMD version of the 2SC945K transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The H945-K, HS945-BL, KSC945L is the TO-92 version of the 2SC945K.You can replace the 2SC945K with the 2SC1570, 2SC1815, 2SC1843, 2SC1843F, 2SC1844, 2SC1844F, 2SC2396, 2SC2458, 2SC2458-BL, 2SC2543, 2SC2545, 2SC2546, 2SC2634, 2SC2785, 2SC2785-KF, 2SC3198, 2SC3198-BL, 2SC3199, 2SC3199-BL, 2SC3329, 2SC3330, 2SC3331, 2SC3916, 2SC3917, 2SC3918, 2SC3919, 2SC3920, 2SC3921, 2SC3922, 2SC3923, 2SD1616, 2SD1616-U, 2SD1616A-U, 2SD789, BC182LB, C1815, C945, H945, H945-K, KSC1815, KSC945C, KSD1616, KSD1616-L, KTC1006, KTC3198, KTC3198BL, KTC3199 or KTC3199BL.