2SD552-DN Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 180 V
• Collector-Base Voltage, max: 220 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 15 A
• Collector Dissipation: 150 W
• DC Current Gain (h_fe): 25 to 50
• Transition Frequency, min: 4 MHz
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-3

Here is an image showing the pin diagram of this transistor.The 2SD552-DN transistor can have a current gain of 25 to 50. The gain of the 2SD552 will be in the range from 25 to 80, for the 2SD552-R it will be in the range from 40 to 80.Sometimes the "2S" prefix is not marked on the package - the 2SD552-DN might only be marked "D552-DN".The complementary PNP transistor to the 2SD552-DN is the 2SB552-BN.You can replace the 2SD552-DN with the 2N6546, 2N6676, 2N6677, MJ15022, MJ15022G, MJ15024, MJ15024G, MJ21194, MJ21194G, MJ21196 or MJ21196G.