TIP145 PNP Transistor Pinout Datasheet

Introduction

The TIP145 is a high-power PNP Darlington transistor designed for applications where high current amplification and reliable switching are required. Built with a monolithic Darlington configuration, it integrates two transistors in one package, providing an extremely high DC current gain (hFE ≥ 1000). With its TO-218 package, the TIP145 is ideal for applications that require efficient power handling and thermal dissipation.

Capable of withstanding a collector-emitter voltage (Vce) of -100V and handling a collector current up to -10A, the TIP145 is widely used in audio amplifier stages, motor control, power supply regulation, and relay drivers. Its high gain allows circuits to be driven with a very low base current, making it efficient and reliable in both switching and amplification applications.

TIP145 PNP Transistor

Engineers prefer the TIP145 transistor for its durability, wide availability, and cost-effectiveness. It is also widely paired with its NPN complementary counterpart, the TIP140, in push-pull amplifier designs and power control circuits. This makes it a popular choice in consumer electronics, industrial control systems, and automotive applications.

TIP145 Pinout

TIP145 Pin Configuration

TIP145 Transistor Key Features

• High current gain due to Darlington pair configuration.
• Capable of handling large collector current up to -10A.
• TO-218 package for excellent heat dissipation.
• Suitable for both switching and linear amplifier applications.
• Reliable performance in audio, power supply, and motor control circuits.
• Widely available and cost-effective.

Characteristics of TIP145 PNP Transistor

• Transistor Type: PNP Darlington Power Transistor
• Package: TO-218
• Collector-Emitter Voltage (Vce): -60V
• Collector-Base Voltage (Vcb): -60V
• Emitter-Base Voltage (Veb): -5V
• Collector Current (Ic): -10A (continuous)
• Power Dissipation (Pd): 125W
• DC Current Gain (hFE): ≥ 1000
• Junction Temperature (Tj): 150°C (max)
• Transition Frequency (ft): 3 MHz (typical)

More Circuit Layouts

Key Applications of TIP145 PNP Transistor

• Audio amplifier output stages.
• Power regulation and control circuits.
• Relay drivers and solenoid control.
• DC motor control in industrial and automotive systems.
• Switching regulators and battery charger designs.
• Push-pull stages with complementary NPN devices.

NPN Complimentary Transistor

TIP140 is the NPN complementary transistor of TIP145.

Equivalent Transistors of TIP145

• TIP146 (PNP Darlington, -100V, higher current)
• TIP147 (PNP Darlington, -100V, improved characteristics)
• BDW94 (PNP Darlington, similar specifications)
• MJ11016 (PNP Darlington, high power alternative)

(Pin configuration of some transistors mentioned above may different from TIP145).

Datasheet of TIP145 PNP Transistor

Click the following Button to download the datasheet of TIP145 Transistor :

More projects, You may like:

• Video Transmitter DIY Homemade FM Radio Transmitter
• Adjustable Power Supply DIY Battery Charger
• 12V-220V 500 Watt inverter DIY Homemade
• MPPT Solar Charge Controller DIY Homemade
• DIY LA4440 bass amplifier homemade

For more project and circuit diagrams, you can go through the Schematics in the main menu where you can find many interesting projects and circuit diagrams like audio amplifier circuits, voltage booster circuit, battery charger circuit and timer circuits etc., which are all beginner circuit projects. Feel free to check them out!

Thank you for visiting the article.