2SC945Q 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): 135 to 270
• 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 2SC945Q 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 2SC945Q transistor can have a current gain of 135 to 270. The gain of the 2SC945 will be in the range from 90 to 600, for the 2SC945K it will be in the range from 300 to 600, for the 2SC945P it will be in the range from 200 to 400, for the 2SC945R it will be in the range from 90 to 180.Sometimes the "2S" prefix is not marked on the package - the 2SC945Q might only be marked "C945Q".The complementary PNP transistor to the 2SC945Q is the 2SA733Q.The 2SC1623 (SOT-23), 2SC1623-L5 (SOT-23), KSC1623 (SOT-23), KSC1623-Y (SOT-23) and MMBT2484 (SOT-23) is the SMD version of the 2SC945Q transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The H945-Q, HS945-Y is the TO-92 version of the 2SC945Q.You can replace the 2SC945Q with the 2SC1318, 2SC1384, 2SC1509, 2SC1815, 2SC2002, 2SC2002-L, 2SC2003, 2SC2003-L, 2SC2274, 2SC2274K, 2SC2277, 2SC2310, 2SC2458, 2SC2785, 2SC2960, 2SC3114, 2SC3198, 2SC3199, 2SC3243, 2SC3244, 2SC3330, 2SC3331, 2SC3382, 2SC3383, 2SC3708, 2SC3916, 2SC3917, 2SC3918, 2SC3919, 2SC3920, 2SC3921, 2SC3922, 2SC3923, 2SC3939, 2SC3940A, 2SC4208A, 2SC4408, 2SC4604, 2SD1207, 2SD1347, 2SD1616, 2SD1616-L, 2SD1616A, 2SD1616A-L, 2SD1835, 2SD438, 2SD667, 2SD789, 2SD863, BC182L, BC182LB, C1815, C945, H945, H945-Q, KSC1008C, KSC1815, KSC945C, KSD1616, KSD1616-Y, KSD1616A, KSD1616A-Y, KSP8098C, KSP8099C, KTC1006, KTC1008, KTC3198, KTC3199 or KTD863.