Overview
The BZX55C18T/R is a high-reliability zener diode produced by EIC Semiconductor Inc. This component is part of the BZX55C series, known for its sharp reverse characteristics, low reverse leakage currents, and high stability. It is designed to provide voltage regulation and is suitable for a variety of applications requiring precise voltage control.
The BZX55C18T/R is a direct replacement for similar zener diodes from other manufacturers such as Zetex/Diodes Inc, National, Fairchild, Motorola, or Sprague, making it a versatile choice for designers and engineers.
Key Specifications
| Parameter | Value |
|---|---|
| Maximum Power Dissipation | 500 mW |
| Maximum Junction Temperature | 200°C |
| Maximum Storage Temperature Range | -65 to +200°C |
| Maximum Forward Voltage @ IF = 100mA | 1 V |
| Zener Voltage (Min) @ I_ZT1 | 16.8 V |
| Zener Voltage (Nom) @ I_ZT1 | 18.0 V |
| Zener Voltage (Max) @ I_ZT1 | 19.1 V |
| Reverse Current (Max) @ V_R | 0.1 µA @ 25°C, 2 µA @ high temperature |
| Impedance (Max) @ I_ZT1 | 50 Ω |
| Impedance (Max) @ I_ZT2 | 170 Ω |
Key Features
- Sharp reverse characteristics
- Low reverse leakage currents
- High reliability with gold back metal for eutectic attach
- High stability and long-term availability
- Replaces obsolete or hard-to-find zeners
- Larger die size enables higher power dissipation at temperature
Applications
The BZX55C18T/R zener diode is suitable for various applications requiring voltage regulation, including:
- Voltage stabilization in power supplies and electronic circuits
- Overvoltage protection in electronic devices
- Signal clipping and limiting in audio and communication systems
- High-reliability applications such as aerospace, automotive, and industrial control systems
Q & A
- What is the maximum power dissipation of the BZX55C18T/R?
The maximum power dissipation is 500 mW.
- What is the maximum junction temperature for this zener diode?
The maximum junction temperature is 200°C.
- What is the typical zener voltage for the BZX55C18T/R?
The typical zener voltage is 18.0 V.
- What are the key features of the BZX55C18T/R?
Key features include sharp reverse characteristics, low reverse leakage currents, high reliability, and high stability.
- Can the BZX55C18T/R replace other zener diodes?
Yes, it can replace similar zener diodes from other manufacturers such as Zetex/Diodes Inc, National, Fairchild, Motorola, or Sprague.
- What are some common applications for the BZX55C18T/R?
Common applications include voltage stabilization, overvoltage protection, signal clipping, and high-reliability systems.
- What is the maximum forward voltage at 100 mA for the BZX55C18T/R?
The maximum forward voltage at 100 mA is 1 V.
- What is the reverse current at 25°C for the BZX55C18T/R?
The reverse current at 25°C is 0.1 µA.
- Is the BZX55C18T/R suitable for high-reliability applications?
Yes, it is specified and tested for use in high-reliability applications.
- What is the storage temperature range for the BZX55C18T/R?
The storage temperature range is -65 to +200°C.
