2SC1173 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): 70 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 2SC1173 transistor can have a current gain of 70 to 240. The gain of the 2SC1173O will be in the range from 70 to 140, for the 2SC1173Y it will be in the range from 120 to 240.Sometimes the "2S" prefix is not marked on the package - the 2SC1173 might only be marked "C1173".The complementary PNP transistor to the 2SC1173 is the 2SA473.You can replace the 2SC1173 with the 2SC1061, 2SC1826, 2SC1985, 2SC2562, 2SC3179, 2SC3239, 2SC3252, 2SC3253, 2SC3254, 2SC3255, 2SC3297, 2SC3299, 2SC3345, 2SC3709, 2SC3709A, 2SC3746, 2SC3747, 2SC3748, 2SC3851, 2SC4935, 2SC790, 2SD1061, 2SD1062, 2SD1133, 2SD1134, 2SD1212, 2SD1235, 2SD1266, 2SD1267, 2SD1354, 2SD1363, 2SD1406, 2SD1412, 2SD1444A, 2SD1666, 2SD1667, 2SD1668, 2SD1669, 2SD1761, 2SD1762, 2SD1913, 2SD234, 2SD235, 2SD2374, 2SD288, 2SD313, 2SD553, 2SD795, 2SD856, 2SD857, 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, BD949, BDT81, BDT81F, D44H8, KSC1173, KSD1406, KSD2058, KSD288, KSD880, KTC3230, KTC4369 or KTD1351.