2N6666 Bipolar Transistor

• Type: PNP
• Collector-Emitter Voltage, max: -40 V
• Collector-Base Voltage, max: -40 V
• Emitter-Base Voltage, max: -5 V
• Collector Current − Continuous, max: -8 A
• Collector Dissipation: 65 W
• DC Current Gain (h_fe): 1000 to 20000
• Operating and Storage Junction Temperature Range: -65 to +150 °C
• Package: TO-220

Here is an image showing the pin diagram of this transistor.The complementary NPN transistor to the 2N6666 is the 2N6386.The 2STN2540 (SOT-223) is the SMD version of the 2N6666 transistor. These transistors are of the same type, have similar parameters and are designed for surface mounting.You can replace the 2N6666 with the 2N6040, 2N6040G, 2N6041, 2N6041G, 2N6667, 2N6667G, 2N6668, 2N6668G, BD202, BD204, BD302, BD304, BD534, BD536, BD538, BD544, BD544A, BD544B, BD546, BD546A, BD546B, BD644, BD646, BD648, BD796, BD798, BD800, BD808, BD810, BD896, BD896A, BD898, BD898A, BD900, BD900A, BDT62, BDT62A, BDT64, BDT64A, BDT82, BDT82F, BDT84, BDT84F, BDW44, BDW45, BDW46, BDW46G, BDW74, BDW74A, BDW74B, BDX34, BDX34A, BDX34B, BDX34BG, BDX54, BDX54A, BDX54B, BDX54BG, BDX78, D45H11, D45H11FP, D45H8, TIP105, TIP105G, TIP106, TIP106G, TIP145T or TIP146T.