Overview
The TIP121G is a medium-power NPN Darlington bipolar power transistor produced by onsemi. It is designed for general-purpose amplifier and low-speed switching applications. This transistor is part of the TIP120, TIP121, and TIP122 series, which are complementary to the PNP transistors TIP125, TIP126, and TIP127.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector-Emitter Voltage (VCEO) | 80 | Vdc |
| Collector Current (IC) - Continuous | 5.0 | A |
| Collector Current (IC) - Peak | 8.0 | A |
| Base Current (IB) | 120 | mA |
| Total Power Dissipation (PD) @ TC = 25°C | 65 | W |
| Collector-Emitter Saturation Voltage (VCE(sat)) @ IC = 3.0 A | 2.0 | Vdc |
| DC Current Gain (hFE) @ IC = 4.0 A | 2500 (typ) | |
| Thermal Resistance, Junction-to-Case (RθJC) | 1.92 | °C/W |
| Thermal Resistance, Junction-to-Ambient (RθJA) | 62.5 | °C/W |
| Operating and Storage Junction Temperature Range | -65 to +150 | °C |
| Package Type | TO-220AB |
Key Features
- High DC Current Gain - hFE = 2500 (typ) @ IC = 4.0 A
- Low Collector-Emitter Saturation Voltage - VCE(sat) = 2.0 Vdc (Max) @ IC = 3.0 A
- Monolithic Construction with Built-In Base-Emitter Shunt Resistors
- Pb-Free Packages are Available
- Compact TO-220 AB Package
Applications
The TIP121G is suitable for various applications including general-purpose amplifiers and low-speed switching circuits. It can be used in power supplies, motor control circuits, and other high-current applications where a high current gain is required.
Q & A
- What is the collector-emitter voltage rating of the TIP121G?
The collector-emitter voltage rating of the TIP121G is 80 Vdc. - What is the continuous collector current rating of the TIP121G?
The continuous collector current rating of the TIP121G is 5.0 A. - What is the typical DC current gain of the TIP121G?
The typical DC current gain of the TIP121G is 2500 at IC = 4.0 A. - What is the collector-emitter saturation voltage of the TIP121G?
The collector-emitter saturation voltage of the TIP121G is 2.0 Vdc (Max) at IC = 3.0 A. - What type of package does the TIP121G come in?
The TIP121G comes in a TO-220AB package. - Is the TIP121G available in Pb-Free packages?
Yes, the TIP121G is available in Pb-Free packages. - What are the thermal resistance values for the TIP121G?
The thermal resistance, junction-to-case (RθJC) is 1.92 °C/W, and the thermal resistance, junction-to-ambient (RθJA) is 62.5 °C/W. - What is the operating and storage junction temperature range for the TIP121G?
The operating and storage junction temperature range for the TIP121G is -65 to +150 °C. - What are some common applications of the TIP121G?
The TIP121G is commonly used in general-purpose amplifiers, low-speed switching circuits, power supplies, and motor control circuits. - How does the TIP121G differ from other transistors in the TIP120 series?
The TIP121G has a higher collector-emitter voltage rating (80 Vdc) compared to the TIP120 (60 Vdc) and TIP122 (100 Vdc).
