Overview
The BZX55C18 is a Zener diode produced by Fairchild Semiconductor, now part of onsemi. This component is designed to provide voltage regulation and is part of the BZX55 series, which offers a wide range of voltage ratings. The BZX55C18 is specifically rated for 18 volts and is suitable for various applications requiring stable voltage reference points.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Zener Voltage (VZ) @ IZ | 18.0 (Min), 20.8 (Max) | V |
| Test Current (IZ) | 5 mA | mA |
| Maximum Zener Current (IZM) | 50 mA | mA |
| Reverse Current (IR) @ VR | 0.1 μA @ 15 V | μA @ V |
| Power Dissipation (PD) | 500 mW @ TL ≤ 75°C | mW |
| Derate above 75°C | 4.0 mW/°C | mW/°C |
| Operating and Storage Temperature Range | -65 to +200 °C | °C |
| Forward Voltage (VF) | 1.3 V Max. @ IF = 100 mA | V |
Key Features
- Voltage Regulation: Provides stable voltage reference points with a tight tolerance.
- Low Reverse Current: Minimizes leakage current, ensuring efficient operation.
- High Power Dissipation: Rated for 500 mW at temperatures up to 75°C.
- Broad Temperature Range: Operates and stores within a range of -65 to +200 °C.
- Compact Package: Available in a DO-35 glass case, suitable for space-constrained designs.
Applications
- Voltage Regulation: Used in power supplies, voltage regulators, and DC-DC converters to maintain stable output voltages.
- Overvoltage Protection: Protects electronic circuits from voltage spikes and surges.
- Signal Processing: Employed in signal conditioning and filtering circuits to stabilize voltage levels.
- Automotive and Industrial Systems: Suitable for use in automotive, industrial, and consumer electronics where reliable voltage regulation is critical.
Q & A
- What is the zener voltage of the BZX55C18?
The zener voltage of the BZX55C18 is between 18.0 V (min) and 20.8 V (max) at a test current of 5 mA.
- What is the maximum power dissipation of the BZX55C18?
The maximum power dissipation is 500 mW at temperatures up to 75°C, derating at 4.0 mW/°C above 75°C.
- What is the operating temperature range of the BZX55C18?
The operating and storage temperature range is -65 to +200 °C.
- What is the forward voltage of the BZX55C18?
The forward voltage (VF) is 1.3 V maximum at a forward current (IF) of 100 mA.
- What package type is the BZX55C18 available in?
The BZX55C18 is available in a DO-35 glass case.
- What are the typical applications of the BZX55C18?
Typical applications include voltage regulation, overvoltage protection, signal processing, and use in automotive and industrial systems.
- Is the BZX55C18 still in production?
No, the BZX55C18 is obsolete and not in production.
- What is the maximum zener current rating for the BZX55C18?
The maximum zener current (IZM) is 50 mA.
- How does the BZX55C18 handle reverse current?
The BZX55C18 has a low reverse current (IR) of 0.1 μA at 15 V.
- Can the BZX55C18 be used in life support devices?
No, Fairchild Semiconductor products, including the BZX55C18, are not authorized for use as critical components in life support devices or systems without express written approval.
