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TIP147 PNP Power Darlington Transistor (TO-247)

Specification	Details
Transistor Polarity	PNP Darlington
Package Type	TO-247
Collector-Emitter Voltage ($V_{CEO}$)	100V
Collector Current ($I_C$) Continuous	10A
Collector Current ($I_C$) Peak	15A
DC Current Gain ($h_{FE}$)	1000 (Min) at 4A
Total Power Dissipation ($P_{tot}$)	125W
Base-Emitter Saturation Voltage	3.5V (Max)

Price

🚚 Ships within 24 Hours
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₹ 38.14

(Tax included)

Barcode: 6466975

Product Description

The TIP147 High-Power Transistor is engineered for high-performance power stages where efficiency and simplicity are required. Because it is a Darlington pair—effectively two transistors in one—it offers a minimum gain of 1000, significantly reducing the drive current required at the base pin. With a $100V$ and $10A$ rating, it is robust enough for industrial CNC controllers, heavy-duty relay drivers, and linear power supply regulators. Its TO-247 package provides a large surface area for heat dissipation, making it superior to the smaller TO-220 for continuous high-power operation.

Key Features

Monolithic Darlington Configuration: Ultra-high current gain for low-power control signals.
High Voltage/Current Capability: Handles up to $100V$ and $10A$ continuous load.
Integrated Anti-Parallel Diode: Provides inherent protection against inductive spikes in some configurations.
Low Saturation Voltage: Optimized for efficient switching in high-power applications.
Complementary Design: Pairs perfectly with the TIP142 (NPN) for Push-Pull amplifier stages.

Technical Details

Pinout (Facing Front): 1. Base, 2. Collector, 3. Emitter.
Mounting: Isolated mounting hole for secure attachment to large aluminum heatsinks.
Junction Temperature: Maximum operating temperature of $150^{\circ}C$.

Prototyping and Engineering Tips from Robogears

The PNP Switching Logic: Remember that as a PNP transistor, the TIP147 is typically used as a "High-Side Switch." To turn the load ON, the base must be pulled to a lower voltage relative to the emitter.
Heatsinking is Mandatory: When dissipating power near its 125W limit, the TO-247 package will become extremely hot. Always use a generous amount of thermal paste and a high-fin-density aluminum heatsink. If the transistor exceeds $25^{\circ}C$ ambient, you must derate the power handling according to the datasheet curves.
Base Resistor Calculation: Even though it has high gain, always use a base resistor (typically $220\Omega$ to $1k\Omega$) to limit the current coming from your control source (e.g., Arduino or PLC).
Inductive Load Protection: While the Darlington pair has an internal diode, for heavy inductive loads like large motors, we still recommend adding an external high-speed "Flyback" diode (like the MUR1560) across the load for maximum circuit longevity.

Package Includes

1 x TIP147 PNP High-Power Darlington Transistor (TO-247)

Disclaimer

This is a high-power semiconductor. Always ensure your power supply and wiring can handle the intended current (up to 10A) to prevent electrical fires. Avoid touching the heatsink or the transistor body while the circuit is under high load.