TIP47 NPN Transistor Pinout Datasheet

Introduction

The TIP47 is a high-voltage NPN power transistor designed for reliable performance in AC and DC switching applications. Housed in the popular TO-220 package, the TIP47 offers excellent heat dissipation and mechanical stability, making it suitable for high-power environments. One of its standout features is its high collector-emitter voltage rating of 250V, which allows it to be safely used in high-voltage AC circuits, DC switching power supplies, and line-operated audio amplifiers.

Note: DATASHEET DOWNLOAD button is provided end of this article.

Engineered for both switching and amplification, the TIP47 is capable of handling a maximum continuous collector current of 1 ampere, with a peak collector current of up to 2 amperes. These characteristics make it ideal for medium-power applications where both voltage endurance and current capability are essential. Its maximum collector dissipation rating of 40 watts allows it to operate efficiently in power-hungry circuits, especially when paired with appropriate heat sinking solutions.

TIP47 NPN Transistor

The TIP47 also features a transition frequency (fT) of 10 MHz, enabling it to perform well in high-frequency switching applications. Additionally, it offers a DC current gain (hFE) ranging from 15 to 150, providing decent amplification performance across a range of collector currents. These specifications make it a strong candidate for use in line-level audio amplification stages, signal processing circuits, and relay drivers in both industrial and consumer electronics.

Thanks to its high-voltage capability, robust thermal characteristics, and moderate current handling, the TIP47 is often recommended for designers looking for a dependable solution in switching regulators, power inverters, and amplifier output stages. Whether you’re developing a switch-mode power supply, a high-voltage controller, or a push-pull amplifier (when used with a complementary PNP transistor like TIP42C), the TIP47 delivers reliable performance and easy integration into existing TO-220-compatible layouts.

TIP47 Pinout

In summary, the TIP47 NPN transistor is a versatile and cost-effective choice for high-voltage applications requiring durability, efficiency, and solid electrical performance. Its wide range of applications and favorable specs make it a valuable component for both professional engineers and hobbyists working on power electronics and audio systems.

TIP47 Transistor Specifications/Characteristics

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Key Applications of TIP47 NPN Transistor

• High voltage AC Circuit
• High Voltage DC Circuit
• Audio amplifier
• Motor Driver
• Switching different types of load under 1A
• Power Inverter
• Switch-mode Power Supply
• Push-pull Amplifier

PNP Complimentary Transistor

The complementary transistor of TIP47 (which is an NPN power transistor) is the TIP42 series, specifically:
TIP42 (or its variants TIP42A/B/C) is the PNP complementary transistor to the TIP47.

Why this pairing?

• TIP47 and TIP42 are designed to work together in push-pull or complementary output stages.
• They have similar current and power ratings, but opposite polarity (NPN vs. PNP).
• Both come in TO-220 packages and are commonly used in audio amplifiers, motor drivers, and power switching circuits.

Equivalent Transistors of TIP47

2SC1447, 2SC1448, 2SC2073, 2SC2229, 2SC2230, 2SC2235, 2SC3421, 2SC1669, 2SC1683, 2SC2238, 2SC2238A, 2SC2238B, 2SC2344, 2SD401, 2SD402, 2SD478, 2SD603, 2SD608, 2SD610, 2SC1410, 2SC1447, 2SC1448, 2SC1669, 2SC1683, 2SC2073.
(The pinout for certain transistors can vary from that of the TIP47).

Datasheet of TIP47 NPN Transistor

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