2N6474 Pinout, Equivalent, Application, Datasheet

The 2N6474 pinout is crucial for anyone working with high-voltage switching circuits, motor drivers, or industrial control systems. As a powerful NPN transistor designed to handle 120V, 4A, and up to 40W in a rugged TO-220 package, the 2N6474 is widely used in demanding power electronics applications where stability and high breakdown voltage are essential.

Introduction to 2N6474 NPN Transistor

The 2N6474 NPN power transistor is engineered for robust, high-voltage switching in medium-current applications. With a collector-emitter voltage of 120V and a collector-base voltage of 130V, it offers a strong safety margin for circuits exposed to voltage spikes or inductive loads. Its 4A current capacity and 40W power dissipation make it suitable for both DC and AC switching environments.

This transistor is built using silicon planar technology, ensuring excellent gain stability, low saturation characteristics, and efficient heat dissipation when mounted on a heatsink. Because it comes in the widely used TO-220 package, the 2N6474 delivers dependable performance in power supply stages, control circuits, inverter modules, and automation systems.

2N6474 NPN Transistor

Pinout of 2N6474

Pin Configuration of 2N6474 Pinout

Understanding the 2N6474 Pinout Configuration

The 2N6474 pinout follows the industry-standard TO-220 arrangement. When viewing the transistor from the front (pins downward, metal tab at the back), the pin sequence is:

Pin-1: Base → Pin-2: Collector → Pin-3: Emitter

This B-C-E configuration ensures compatibility with most high-power BJT driver and switching circuits.

Key Features of 2N6474 Transistor

• High-voltage capability for robust switching
• Medium-current handling up to 4A
• Durable TO-220 package with good thermal control
• Suitable for inductive and resistive loads
• Reliable gain and switching efficiency
• Ideal for industrial and automotive applications

2N6474 Transistor Datasheet and Specifications

• Collector-Emitter Voltage (Vce): 120V
• Collector-Base Voltage (Vcb): 130V
• Collector Current (Ic): 4A
• Total Power Dissipation (Pd): 40W
• Package Type: TO-220
• Pin Configuration: Base – Collector – Emitter
• Transistor Type: NPN Bipolar Junction Transistor

Working Principle of 2N6474 Transistor

The 2N6474 operates by using a small base current to control a larger collector-emitter current. In switching mode, it performs efficiently with low saturation voltage, ensuring minimal power loss and heat generation during high-current operations.

Thanks to its strong 120V Vce rating, the 2N6474 remains stable in circuits with high voltage swings, inductive elements, or transient spikes. When paired with a heatsink, it can run continuously at moderate loads, making it ideal for PWM motor controllers, solenoid drivers, inverters, and linear power control designs.

More Circuit Layouts

Applications of 2N6474 Transistor

• Motor driver circuits
• Relay and solenoid switching
• Power supply output regulation
• Inverter and converter stages
• Industrial automation equipment
• AC/DC switching circuits
• Lamp and LED power drivers
• General-purpose high-voltage switching

Equivalent and Alternative Transistors

Possible equivalent or near-equivalent transistors for 2N6474 include:

• 2N6473 (lower voltage variant)
• TIP48 (higher voltage, lower current)
• MJE13009 (higher voltage, faster switching)
• BD249C (higher wattage handling)
• TIP41C (lower voltage, but sometimes usable)
• 2SD1047 (higher gain and wattage)

Always verify voltage and current requirements before substitution.

Frequently Asked Questions (FAQ)

What is the 2N6474 used for?

It is used for motor drives, relay switching, inverter stages, and medium-power high-voltage switching applications.

What type of transistor is the 2N6474?

It is an NPN bipolar junction transistor.

What is the 2N6474 pinout?

The pins are: 1-Base, 2-Collector, 3-Emitter.

How much current can the 2N6474 handle?

It can safely handle 4A with proper cooling.

Can I replace 2N6474 with TIP48?

Yes, in some circuits, but ensure voltage and current requirements match.

Conclusion

The 2N6474 NPN transistor is a high-voltage, medium-current switching device trusted for reliable operation in power electronics and industrial systems. With its 120V/130V voltage rating, 4A current capacity, 40W dissipation, and rugged TO-220 packaging, it remains a solid choice for engineers needing durability, performance, and safety margin in demanding applications.

Datasheet & Pinout of 2N6474 NPN Transistor

Click the following Button to download the datasheet of 2N6474 Transistor :

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