Overview
The TIP121TU is a medium-power NPN Darlington transistor manufactured by onsemi. This device is part of the TIP120 series, which includes complementary PNP types. The TIP121TU is designed for general-purpose amplifier and low-speed switching applications. It is packaged in a TO-220AB case, making it suitable for a variety of power management and control circuits.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector-Emitter Voltage (VCEO) | 80 | Vdc |
| Collector-Base Voltage (VCBO) | 80 | Vdc |
| Emitter-Base Voltage (VEBO) | 5.0 | Vdc |
| Collector Current (IC) - Continuous | 5.0 | A |
| Collector Current (IC) - Peak | 8.0 | A |
| Base Current (IB) | 120 | mA |
| Total Power Dissipation @ TC = 25°C | 65 | W |
| Thermal Resistance, Junction-to-Case (RθJC) | 1.92 | °C/W |
| Thermal Resistance, Junction-to-Ambient (RθJA) | 62.5 | °C/W |
| Operating Junction Temperature (TJ) | -65 to +150 | °C |
| Storage Temperature Range (Tstg) | -65 to +150 | °C |
Key Features
- High DC Current Gain: hFE = 2500 (Typ) @ IC = 4.0 A dc.
- Collector-Emitter Sustaining Voltage: VCEO(sus) = 80 Vdc (Min).
- Low Collector-Emitter Saturation Voltage: VCE(sat) = 2.0 Vdc (Max) @ IC = 3.0 A dc.
- Monolithic Construction with Built-In Base-Emitter Shunt Resistors: Enhances stability and performance.
- Pb-Free Packages Available: Compliant with environmental regulations.
Applications
The TIP121TU is suitable for various applications, including:
- General-Purpose Amplifiers: Due to its high current gain and low saturation voltage, it is ideal for amplifier circuits.
- Low-Speed Switching Applications: It can handle high collector currents and voltages, making it suitable for switching applications.
- Power Management and Control Circuits: Its medium power handling capabilities make it a good choice for power management and control in various electronic systems.
Q & A
- What is the collector-emitter voltage rating of the TIP121TU?
The collector-emitter voltage rating of the TIP121TU is 80 Vdc.
- What is the maximum collector current for the TIP121TU?
The maximum continuous collector current is 5.0 A, and the peak collector current is 8.0 A.
- What is the thermal resistance, junction-to-case, for the TIP121TU?
The thermal resistance, junction-to-case (RθJC), is 1.92 °C/W).
- Is the TIP121TU Pb-free?
- What is the operating junction temperature range for the TIP121TU?
The operating junction temperature range is -65 to +150 °C).
- What are the typical applications of the TIP121TU?
The TIP121TU is typically used in general-purpose amplifier and low-speed switching applications).
- What is the DC current gain (hFE) of the TIP121TU?
The DC current gain (hFE) is 2500 (Typ) @ IC = 4.0 A dc).
- What is the collector-emitter saturation voltage (VCE(sat)) of the TIP121TU?
The collector-emitter saturation voltage (VCE(sat)) is 2.0 Vdc (Max) @ IC = 3.0 A dc).
- Is the TIP121TU still in production?
No, the TIP121TU is scheduled for obsolescence and will be discontinued by the manufacturer).
- What package type does the TIP121TU come in?
The TIP121TU comes in a TO-220AB package).
