2SC1815O 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: 0.15 A
• Collector Dissipation: 0.4 W
• DC Current Gain (h_fe): 70 to 140
• Transition Frequency, min: 80 MHz
• Noise Figure, max: 1 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SC1815O 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 2SC1815O transistor can have a current gain of 70 to 140. The gain of the 2SC1815 will be in the range from 70 to 700, for the 2SC1815GR it will be in the range from 200 to 400, for the 2SC1815L it will be in the range from 350 to 700, for the 2SC1815Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SC1815O might only be marked "C1815O".The complementary PNP transistor to the 2SC1815O is the 2SA1015O.The 2SC2712 (SOT-23), 2SC2712-O (SOT-23), 2SC4116 (SOT-323), 2SC4116-O (SOT-323), 2SC4738 (SOT-23), 2SC4738-O (SOT-23), FJX945 (SOT-323), FJX945O (SOT-323), KTC3875 (SOT-23), KTC3875O (SOT-23), KTC3875S (SOT-23) and KTC3875S-O (SOT-23) is the SMD version of the 2SC1815O transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.The KSC1815O is the TO-92 version of the 2SC1815O.You can replace the 2SC1815O with the 2SC1627, 2SC1627-O, 2SC1627A, 2SC1627A-O, 2SC2000, 2SC2274, 2SC2274K, 2SC2277, 2SC2458, 2SC2458-O, 2SC2655, 2SC2655O, 2SC3198, 2SC3198-O, 2SC3199, 2SC3199-O, 2SC3243, 2SC3244, 2SC3328, 2SC3328-O, 2SC3916, 2SC3917, 2SC3918, 2SC3919, 2SC3920, 2SC3921, 2SC3922, 2SC3923, 2SD438, 2SD667, 2SD667A, 2SD863, BC637, BC639, C1815, C1815O, C945, C945O, KSC1008C, KSC1008CO, KSC1815, KSC1815O, KSC2331, KSC2331O, KSC945C, KSC945CO, KTC3198, KTC3198O, KTC3199, KTC3199O, KTC3209, KTC3209O, KTC3227, KTC3227O or KTD863.