2SD414-Q Bipolar Transistor

• Type: NPN
• Collector-Emitter Voltage, max: 80 V
• Collector-Base Voltage, max: 100 V
• Emitter-Base Voltage, max: 5 V
• Collector Current − Continuous, max: 0.8 A
• Collector Dissipation: 10 W
• DC Current Gain (h_fe): 100 to 200
• Transition Frequency, min: 45 MHz
• Operating and Storage Junction Temperature Range: -55 to +150 °C
• Package: TO-126

Here is an image showing the pin diagram of this transistor.The 2SD414-Q transistor can have a current gain of 100 to 200. The gain of the 2SD414 will be in the range from 40 to 320, for the 2SD414-P it will be in the range from 160 to 320, for the 2SD414-R it will be in the range from 60 to 120, for the 2SD414-S it will be in the range from 40 to 80.Sometimes the "2S" prefix is not marked on the package - the 2SD414-Q might only be marked "D414-Q".The complementary PNP transistor to the 2SD414-Q is the 2SB548-Q.The 2SC3438 (SOT-89) and 2SC3438-D (SOT-89) is the SMD version of the 2SD414-Q transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2SD414-Q with the 2SC1212A, 2SC1212A-C, 2SC1565, 2SC2481, 2SC2481-O, 2SC2690, 2SC2690-Q, 2SC2690A, 2SC2690A-Q, 2SC2824, 2SC3117, 2SC3117-R, 2SC3421, 2SC3621, 2SC3621-O, 2SC3902, 2SC3902-R, 2SD1684, 2SD1684-Q, 2SD1724, 2SD1724-R, 2SD1725, 2SD1725-R, 2SD415, 2SD415-Q, 2SD600, 2SD600-E, 2SD600K, 2SD600K-E, 2SD669, 2SD669-C, 2SD669A, 2SD669A-C, BD139, BD139-16, BD139G, BD169, BD179, BD230, BD237, BD237G, BD379, BD379-16, BD789, BD791, KSC2690, KSC2690-O, KSC2690A, KSC2690A-O, KSE182, KTC2800, KTC2803, KTC2803-Y, MJE182, MJE182G, MJE240, MJE242, MJE244 or MJE722.