The TIP41C is a base-island NPN power transistor designed for a wide range of switching and amplifier applications. It is part of a family (TIP41, A, B, C) where the “C” variant offers the highest voltage rating. Unlike Darlington transistors, the TIP41C is a single-junction BJT, which results in a lower saturation voltage and faster switching speeds at the expense of lower gain. It is a popular choice for building medium-power audio amplifiers, motor controllers, and voltage regulators where efficiency and thermal stability are critical.
TIP41C Pinout (TO-220)
Housed in the TO-220 package, when looking at the front with the pins pointing down, the sequence from left to right is Base, Collector, and Emitter.
| Pin | Terminal | Function |
| 1 | Base (B) | Control terminal |
| 2 | Collector (C) | Connected to the load and the metal tab |
| 3 | Emitter (E) | Connected to the ground or negative rail |
Technical Specifications
- Transistor Polarity: NPN
- Collector-Emitter Voltage (VCEO): 100V
- Collector-Base Voltage (VCBO): 100V
- Emitter-Base Voltage (VEBO): 5V
- Collector Current (IC): 6A (Continuous)
- DC Current Gain (hFE): 15 to 75
- Max Power Dissipation (PD): 65W
- Transition Frequency (fT): 3 MHz
Key Features & Benefits
- High Voltage Rating: The 100V capacity allows for use in higher voltage DC power circuits.
- Low Saturation Voltage: Reduces power loss and heat generation during switching operations.
- Thermal Efficiency: The TO-220 package allows for easy attachment to large heatsinks.
- Robust Construction: Designed to handle moderate power surges in industrial environments.
Common Applications
- Audio Power Stages: Used as the output driver in medium-power sound systems.
- Switching Regulators: Acting as the main switch in DC-DC converters.
- Motor Drivers: Managing medium-sized DC motors.
- Relay & Solenoid Control: Switching heavy inductive loads up to 6A.
TIP41C Equivalent & Substitutes
- TIP41A / TIP41B (Lower voltage versions)
- 2SD1062 (Japanese equivalent)
- MJE3055T (Similar power rating)
- BD243C (Direct power substitute)
Related Tutorials on ElxHub
- Basics: Learn more in Transistors – Basics, Types, and Working
- Signal Shifting: Learn how to bridge logic levels in our Logic Level Shifter Tutorial
- Selection Guide: Compare power options in our Ultimate Transistor Selection Guide
Conclusion
The TIP41C is a dependable power transistor that excels in medium-power applications. Its balanced design provides enough current handling for most DIY power projects while remaining easy to drive and thermally manage. For designers building power supplies or audio gear, the TIP41C is a versatile and cost-effective solution.
Download the Transistor Datasheet pdf
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