KSC1730 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 15 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.05 A
• Collector Dissipation: 0.25 W
• DC Current Gain (h_fe): 40 to 240
• Transition Frequency, min: 1100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-92

The KSC1730 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 KSC1730 transistor can have a current gain of 40 to 240. The gain of the KSC1730O will be in the range from 70 to 140, for the KSC1730R it will be in the range from 40 to 80, for the KSC1730Y it will be in the range from 120 to 240.The MMBT918 (SOT-23) is the SMD version of the KSC1730 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the KSC1730 with the 2N3394, 2N3706, 2SC2347 or KTC3192.