2SC3421 Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 120 V
• Collector-Base Voltage, max: 120 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 1 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 80 to 240
• Transition Frequency, min: 120 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126F

Here is an image showing the pin diagram of this transistor.The 2SC3421 transistor can have a current gain of 80 to 240. The gain of the 2SC3421-O will be in the range from 80 to 160, for the 2SC3421-Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SC3421 might only be marked "C3421".The complementary PNP transistor to the 2SC3421 is the 2SA1358.The 2SC2881 (SOT-89), FMMT625 (SOT-23) and KTC4373 (SOT-89) is the SMD version of the 2SC3421 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC3421 with the 2SC1565, 2SC1565A, 2SC2481, 2SC2690, 2SC2690A, 2SC2824, 2SD600K, 2SD669, KSC2690, KSC2690A or KTC2800.