BZX85C18 Diode: Encyclopedia Entry

Introduction

The BZX85C18 diode is a crucial component in electronic circuits, belonging to the category of Zener diodes. This entry provides an overview of the basic information, specifications, pin configuration, functional features, advantages and disadvantages, working principles, application field plans, and alternative models of the BZX85C18 diode.

Basic Information Overview

• Category: Zener diode
• Use: Voltage regulation and protection in electronic circuits
• Characteristics: Precise voltage regulation, low impedance, high reliability
• Package: Axial leaded package
• Essence: Regulates voltage by maintaining a constant output voltage under varying load conditions
• Packaging/Quantity: Typically available in reels or tubes with varying quantities

Specifications

• Voltage: 18V
• Power Dissipation: 1.3W
• Zener Impedance: 5Ω
• Operating Temperature Range: -65°C to +200°C
• Tolerance: ±5%

Detailed Pin Configuration

The BZX85C18 diode has an axial leaded package with two leads. The cathode is denoted by a band on the body of the diode.

Functional Features

• Voltage Regulation: Maintains a constant voltage across its terminals, providing stability in electronic circuits.
• Overvoltage Protection: Safeguards sensitive components by diverting excess voltage away from the circuit.

Advantages and Disadvantages

Advantages

• Precise voltage regulation
• Low impedance
• High reliability
• Cost-effective solution for voltage regulation

Disadvantages

• Limited power dissipation capability
• Susceptible to thermal runaway at high currents

Working Principles

The BZX85C18 diode operates based on the principle of the Zener effect, where it maintains a constant voltage drop across its terminals by allowing current to flow in reverse bias when the voltage exceeds its breakdown voltage.

Detailed Application Field Plans

The BZX85C18 diode finds extensive use in various applications, including: 1. Voltage Regulation: Used in power supplies and voltage reference circuits. 2. Overvoltage Protection: Employed to protect sensitive components from voltage spikes in automotive electronics and industrial equipment. 3. Signal Clipping: Utilized in audio circuits to clip or limit the amplitude of signals.

Detailed and Complete Alternative Models

Several alternative models to the BZX85C18 diode include: - BZX85C15: 15V Zener diode with similar characteristics - BZX85C20: 20V Zener diode offering different voltage options - 1N4744A: 15V Zener diode with axial leaded package

In conclusion, the BZX85C18 diode serves as a critical component in electronic circuits, providing precise voltage regulation and overvoltage protection. Its characteristics, working principles, and application versatility make it an essential choice for various electronic designs.

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