Overview
The 1N4746ATR is a Zener diode produced by onsemi, designed to provide voltage regulation in electronic circuits. This diode is part of the 1N4728A to 1N4758A series, which offers a wide range of voltage options. The 1N4746ATR specifically has a Zener voltage of 18 volts, making it suitable for various applications requiring stable voltage reference points.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Zener Voltage (VZ) @ IZ | 17.1 - 18 - 18.9 | V |
| Test Current (IZ) | 20 mA | mA |
| Maximum Zener Impedance (ZZ @ IZ) | 14 Ω | Ω |
| Reverse Leakage Current (IR) @ VR | 5 µA @ 13.7 V | µA @ V |
| Operating Temperature Range | -65°C to +200°C | °C |
| Power Dissipation @ TL ≤ 50°C | 1.0 W | W |
| Derate above 50°C | 6.67 mW/°C | mW/°C |
| Mounting Type | Through Hole | |
| Package | Axial Lead / DO-41 |
Key Features
- Voltage Regulation: Provides a stable voltage reference point, essential for various electronic circuits.
- Wide Operating Temperature Range: Can operate from -65°C to +200°C, making it suitable for harsh environments.
- Low Zener Impedance: The maximum Zener impedance of 14 Ω ensures minimal voltage drop across the diode.
- High Power Dissipation: Capable of dissipating up to 1.0 W of power at temperatures below 50°C.
- Through Hole Mounting: Easy to integrate into PCBs and other electronic assemblies using through-hole mounting.
Applications
- Voltage Regulation Circuits: Used to regulate voltage in power supplies, audio equipment, and other electronic devices.
- Overvoltage Protection: Acts as a protective device to prevent voltage spikes from damaging sensitive components.
- Reference Voltage Sources: Provides a stable reference voltage in analog circuits, such as in op-amp circuits and voltage dividers.
- Aerospace and Automotive Systems: Suitable for use in harsh environments due to its wide operating temperature range.
Q & A
- What is the Zener voltage of the 1N4746ATR?
The Zener voltage of the 1N4746ATR is between 17.1 and 18.9 volts.
- What is the maximum operating temperature of the 1N4746ATR?
The maximum operating temperature is +200°C.
- What is the power dissipation capacity of the 1N4746ATR at temperatures below 50°C?
The power dissipation capacity is up to 1.0 W.
- What is the reverse leakage current of the 1N4746ATR?
The reverse leakage current is 5 µA at 13.7 V.
- What type of mounting does the 1N4746ATR use?
The 1N4746ATR uses through-hole mounting.
- What is the package type of the 1N4746ATR?
The package type is Axial Lead / DO-41.
- What are some common applications of the 1N4746ATR?
Common applications include voltage regulation circuits, overvoltage protection, reference voltage sources, and use in aerospace and automotive systems.
- How does the 1N4746ATR handle high temperatures?
The 1N4746ATR can operate in a wide temperature range from -65°C to +200°C.
- What is the maximum Zener impedance of the 1N4746ATR?
The maximum Zener impedance is 14 Ω.
- Can the 1N4746ATR be used in harsh environments?
Yes, it is suitable for use in harsh environments due to its wide operating temperature range and robust construction.
