2N3773 Transistor Pinout, Equivalent, Checking & Comparison with 2N3055

The 2N3773 is a powerful NPN transistor specially designed for high quality and high power audio amplifier circuits. It has high collector emitter voltage of 140V and 150 watt power dissipation. This transistor also used in Motor driver circuit and High current switching circuits. In this article I’m sharing the 2N3773 Transistor pinout, equivalent transistor information’s, checking guide and comparison table of 2N3773 vs 2N3055.

What is 2N3773 Transistor?

• NPN power transistor mostly using for high quality power audio amplifier circuits.
• Comes in TO-3 metal packaging.
• The power dissipation is around 150 watts, it is enough for high power audio amps.

2N3773 Transistor Pinout Diagram

Pinout Configuration

Specifications and Features

• Type is NPN power transistor
• TO-3 Metal packaging
• Collector to Emitter voltage is 140V
• Collector to Base voltage is 160V
• Continuous Collector current is 16A
• Power dissipation is 150W

Equivalent Transistors for Replacement

Best alternative transistors are MJ15003, 2N6609, and TIP35C and other alternatives include 2N3000, 2N3009, 2N3010, 2N3011, 2N3012, and 2N3013.

How to Check 2N3773 Transistor using Multimeter

• Turn the multimer knob to the diode checking mode.
• Connect Red probe on the base and black probe on the emitter, which will shows the reading between 0.45 to 0.9V.
• Swap the pins Red probe to Emitter and Black probe to Base then it will show no readings such as open loop (OL).
• If the short indicating between collector and emitter without base voltage means the transistor is faulty.

2N3773 vs 2N3055 Transistor