BZT52C18-HE3-18 Encyclopedia Entry

Product Overview

The BZT52C18-HE3-18 belongs to the category of Zener diodes, which are widely used in electronic circuits for voltage regulation and protection. This particular diode is designed to provide a stable 18V output voltage with specific characteristics that make it suitable for various applications. The package type is SOD-123, and it is available in tape and reel packaging with a quantity of 3000 units per reel.

Specifications

• Voltage Output: 18V
• Power Dissipation: 500mW
• Zener Voltage Tolerance: ±5%
• Operating Temperature Range: -65°C to +150°C
• Forward Voltage: 1.2V
• Reverse Leakage Current: 5μA

Pin Configuration

The BZT52C18-HE3-18 Zener diode has a standard SOD-123 package with three pins. The pin configuration is as follows: 1. Pin 1: Anode 2. Pin 2: Not connected 3. Pin 3: Cathode

Functional Features

• Stable Voltage Regulation: The diode maintains a constant 18V output under varying load conditions.
• Overvoltage Protection: It prevents the circuit from experiencing voltage spikes beyond 18V.
• Fast Response Time: The diode quickly responds to changes in input voltage, ensuring rapid regulation.

Advantages and Disadvantages

Advantages

• Precise voltage regulation
• Compact SOD-123 package
• Wide operating temperature range

Disadvantages

• Limited power dissipation capability
• Higher reverse leakage current compared to some alternatives

Working Principles

The BZT52C18-HE3-18 operates based on the Zener effect, where it exhibits a controlled breakdown at a specific voltage. When the input voltage exceeds 18V, the diode conducts and effectively clamps the output voltage at this level, providing a stable reference for the circuit.

Application Field Plans

Voltage Regulation in Power Supplies

The diode can be used in power supply circuits to regulate the output voltage at 18V, ensuring consistent performance of connected devices.

Overvoltage Protection

In electronic systems, the diode can serve as a protective element, preventing sensitive components from being damaged by excessive voltage levels.

Signal Clipping

It can be utilized in signal processing circuits to clip or limit the amplitude of input signals to 18V.

Alternative Models

For those seeking alternatives to the BZT52C18-HE3-18, the following models can be considered: - 1. BZX84C18: A similar 18V Zener diode with a SOT-23 package. - 2. MMBZ5242B: Another 18V Zener diode available in a smaller SOD-123FL package.

In conclusion, the BZT52C18-HE3-18 Zener diode offers precise voltage regulation and overvoltage protection in a compact package, making it suitable for various electronic applications.

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