MMBZ5251B

Introduction

The MMBZ5251B is a diode belonging to the category of Zener diodes. This diode is commonly used for voltage regulation and protection in various electronic circuits due to its specific characteristics.

Basic Information Overview

• Category: Zener diode
• Use: Voltage regulation and protection
• Characteristics: Sharp breakdown voltage, low leakage current
• Package: SOD-123 package
• Essence: Semiconductor diode
• Packaging/Quantity: Typically available in reels of 3000 units

Specifications

• Voltage Range: 2.4V to 75V
• Power Dissipation: 350mW
• Operating Temperature: -65°C to +150°C
• Forward Voltage: 0.9V (max) at 200mA
• Reverse Leakage Current: 5μA (max) at 51V

Detailed Pin Configuration

The MMBZ5251B Zener diode has three pins: anode, cathode, and no connection (NC). The anode is connected to the positive terminal, the cathode to the negative terminal, and the NC pin is left unconnected.

Functional Features

• Voltage Regulation: The MMBZ5251B maintains a constant voltage across its terminals when operated in the reverse breakdown region.
• Overvoltage Protection: It protects sensitive components in a circuit by diverting excess voltage away from them.

Advantages and Disadvantages

Advantages

• Precise voltage regulation
• Low leakage current
• Compact SOD-123 package

Disadvantages

• Limited power dissipation capability
• Narrow voltage range compared to other Zener diodes

Working Principles

The MMBZ5251B operates based on the principle of the Zener effect, where it maintains a nearly constant voltage drop across its terminals when reverse biased. This allows it to regulate voltage within a specific range and protect other components from overvoltage conditions.

Detailed Application Field Plans

The MMBZ5251B finds extensive use in various applications, including: - Voltage regulators in power supplies - Overvoltage protection in communication equipment - Signal clamping in audio and video circuits - Voltage reference in precision measurement instruments

Detailed and Complete Alternative Models

Some alternative models to the MMBZ5251B include: - BZX84C2V4: Similar voltage range and package type - 1N4728A: Higher power dissipation capability - BZT52C2V4: Lower reverse leakage current

In conclusion, the MMBZ5251B Zener diode offers precise voltage regulation and overvoltage protection in a compact package, making it suitable for a wide range of electronic applications.

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