2SC4551-M Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 60 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 7 V
• Collector Current − Continuous, max: 10 A
• Collector Dissipation: 30 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 140 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-220F

Here is an image showing the pin diagram of this transistor.The 2SC4551-M transistor can have a current gain of 100 to 200. The gain of the 2SC4551 will be in the range from 100 to 400, for the 2SC4551-K it will be in the range from 200 to 400, for the 2SC4551-L it will be in the range from 150 to 300.Sometimes the "2S" prefix is not marked on the package - the 2SC4551-M might only be marked "C4551-M".The complementary PNP transistor to the 2SC4551-M is the 2SA1743-M.You can replace the 2SC4551-M with the 2SC2527, 2SC3255, 2SC3255-R, 2SC3346, 2SC3710, 2SC3710A, 2SC3748, 2SC3748-R, 2SC4552, 2SC4552-M, BD545A, BD545B, BD545C, BD807, BD809, BDT81, BDT81F, BDT83, BDT83F, BDT85, BDT85F, BDT87, BDT87F, BDT91, BDT91F, BDT93, BDT93F, BDT95, BDT95F, D44H11, D44H11FP or D44H8.