2SC1890 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 90 V
• Collector-Base Voltage, max: 90 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.05 A
• Collector Dissipation: 0.3 W
• DC Current Gain (h_fe): 250 to 1200
• Transition Frequency, min: 200 MHz
• Noise Figure, max: 2 dB
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The 2SC1890 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 2SC1890 transistor can have a current gain of 250 to 1200. The gain of the 2SC1890-D will be in the range from 250 to 500, for the 2SC1890-E it will be in the range from 400 to 800, for the 2SC1890-F it will be in the range from 600 to 1200.Sometimes the "2S" prefix is not marked on the package - the 2SC1890 might only be marked "C1890".The complementary PNP transistor to the 2SC1890 is the 2SA893.You can replace the 2SC1890 with the 2SC1841, 2SC1845, 2SC1890A, 2SC2543, 2SC2544, 2SC2546, 2SC2784, 2SD755 or KSC1845.