2SC1173Y Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 30 V
• Collector-Base Voltage, max: 30 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 3 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 120 to 240
• Transition Frequency, min: 100 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The 2SC1173Y transistor can have a current gain of 120 to 240. The gain of the 2SC1173 will be in the range from 70 to 240, for the 2SC1173O it will be in the range from 70 to 140.Sometimes the "2S" prefix is not marked on the package - the 2SC1173Y might only be marked "C1173Y".The complementary PNP transistor to the 2SC1173Y is the 2SA473Y.The KTC4375 (SOT-89) is the SMD version of the 2SC1173Y transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SC1173Y with the 2SC1061, 2SC1826, 2SC1985, 2SC2562, 2SC2562Y, 2SC3179, 2SC3239, 2SC3239-Y, 2SC3252, 2SC3253, 2SC3254, 2SC3255, 2SC3297, 2SC3297-Y, 2SC3299, 2SC3299-Y, 2SC3345, 2SC3345-Y, 2SC3709, 2SC3709-Y, 2SC3709A, 2SC3709A-Y, 2SC3746, 2SC3747, 2SC3748, 2SC3851, 2SC4550, 2SC4551, 2SC4552, 2SC4881, 2SC4935, 2SC4935Y, 2SC790, 2SC790-Y, 2SD1060, 2SD1061, 2SD1062, 2SD1133, 2SD1134, 2SD1212, 2SD1235, 2SD1266, 2SD1266-P, 2SD1267, 2SD1267-P, 2SD1354, 2SD1363, 2SD1363-Y, 2SD1406, 2SD1412, 2SD1412-Y, 2SD1444A, 2SD1445A, 2SD1666, 2SD1667, 2SD1668, 2SD1669, 2SD1761, 2SD1762, 2SD1913, 2SD2012, 2SD2061, 2SD234, 2SD234Y, 2SD235, 2SD235-Y, 2SD2374, 2SD2374-P, 2SD2394, 2SD2395, 2SD288, 2SD288-Y, 2SD313, 2SD553, 2SD553-Y, 2SD795, 2SD856, 2SD856-P, 2SD857, 2SD857-P, 2SD880, BD201, BD203, BD241, BD241A, BD243, BD243A, BD301, BD303, BD533, BD535, BD539, BD539A, BD543, BD543A, BD545, BD545A, BD735, BD737, BD795, BD797, BD807, BD933, BD933F, BD935, BD935F, BD945, BD947, BD949, BDT81, BDT81F, D44H8, KSC1173, KSC1173Y, KSD1406, KSD2012, KSD2058, KSD288, KSD288-Y, KSD880, KTC2016, KTC2026, KTC3230, KTC3230Y, KTC4369, KTC4369Y or KTD1351.