Overview
The BZX79C18 is a zener diode produced by Fairchild Semiconductor, now part of onsemi. This component is designed to provide voltage regulation and protection in various electronic circuits. The BZX79C18 is part of the BZX79C series, which offers a range of zener voltages to suit different application requirements.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Zener Voltage (VZ) | 16.8 - 19.1 | V |
| Power Dissipation (PD) | 500 mW | mW |
| Derate above 75°C | 4.0 mW/°C | mW/°C |
| Operating and Storage Temperature Range (TJ, TSTG) | −65 to +200 °C | °C |
| Leakage Current (IR) | 0.05 μA (max) | μA |
| Forward Voltage (VF) | 1.2 V (max) @ IF = 200 mA | V |
| Package Type | Through Hole DO-204AH (DO-35) |
Key Features
- Voltage Regulation: Provides stable zener voltage to regulate and stabilize voltage levels in circuits.
- Low Leakage Current: Minimal leakage current ensures minimal power loss and efficient operation.
- High Temperature Range: Operates over a wide temperature range from −65°C to +200°C, making it suitable for various environmental conditions.
- Compact Packaging: Available in the DO-204AH (DO-35) package, which is compact and suitable for a variety of applications.
Applications
- Voltage Regulation: Used in voltage regulator circuits to maintain a stable output voltage.
- Overvoltage Protection: Acts as a protective device to prevent overvoltage conditions in electronic circuits.
- Signal Clamping: Can be used to clamp signal voltages to a specific level, preventing damage to sensitive components.
- Power Supplies: Often used in power supply circuits to ensure stable and regulated output voltages.
Q & A
- What is the zener voltage range of the BZX79C18?
The zener voltage range of the BZX79C18 is between 16.8 V and 19.1 V.
- What is the maximum power dissipation of the BZX79C18?
The maximum power dissipation of the BZX79C18 is 500 mW.
- What is the operating temperature range of the BZX79C18?
The operating and storage temperature range of the BZX79C18 is from −65°C to +200°C.
- What is the leakage current of the BZX79C18?
The leakage current (IR) of the BZX79C18 is 0.05 μA (maximum).
- What is the forward voltage of the BZX79C18?
The forward voltage (VF) of the BZX79C18 is 1.2 V (maximum) at IF = 200 mA.
- In what package type is the BZX79C18 available?
The BZX79C18 is available in the Through Hole DO-204AH (DO-35) package.
- What are some common applications of the BZX79C18?
The BZX79C18 is commonly used in voltage regulation, overvoltage protection, signal clamping, and power supply circuits.
- How does the BZX79C18 protect against overvoltage?
The BZX79C18 acts as a protective device by clamping the voltage to its zener voltage level, preventing overvoltage conditions in electronic circuits.
- Can the BZX79C18 be used in high-temperature environments?
Yes, the BZX79C18 can operate over a wide temperature range from −65°C to +200°C, making it suitable for high-temperature environments.
- What is the significance of the derate value above 75°C for the BZX79C18?
The derate value of 4.0 mW/°C above 75°C indicates the rate at which the power dissipation capability of the diode decreases with increasing temperature.
