BZX84-B18/DG/B3,21

Product Overview

The BZX84-B18/DG/B3,21 is a voltage regulator diode belonging to the category of electronic components. It is commonly used for voltage regulation and protection in various electronic circuits. This diode exhibits characteristics such as low forward voltage drop, high surge current capability, and compact packaging. The BZX84-B18/DG/B3,21 is typically available in small packages and is essential for stabilizing voltage in electronic devices.

Basic Information

• Category: Electronic Components
• Use: Voltage Regulation and Protection
• Characteristics: Low Forward Voltage Drop, High Surge Current Capability
• Package: Small SOT-23 Package
• Essence: Stabilizing Voltage in Electronic Circuits
• Packaging/Quantity: Typically Available in Reel Packaging with Quantities Varying by Manufacturer

Specifications

• Voltage Rating: 18V
• Power Dissipation: 250mW
• Forward Current: 200mA
• Reverse Leakage Current: 5µA
• Operating Temperature Range: -55°C to +150°C

Detailed Pin Configuration

The BZX84-B18/DG/B3,21 features a standard SOT-23 package with three pins: anode, cathode, and no-connect.

Functional Features

• Voltage Regulation: Provides stable voltage output under varying load conditions.
• Overvoltage Protection: Safeguards connected circuits from excessive voltage spikes.

Advantages and Disadvantages

Advantages

• Compact Size: Suitable for space-constrained applications.
• Low Forward Voltage Drop: Minimizes power loss in the circuit.

Disadvantages

• Limited Current Handling: Not suitable for high-power applications.
• Sensitivity to Reverse Voltage: Requires additional protection in reverse-biased conditions.

Working Principles

The BZX84-B18/DG/B3,21 operates based on the principle of Zener breakdown, where it maintains a constant voltage drop across its terminals, effectively regulating the output voltage.

Detailed Application Field Plans

The BZX84-B18/DG/B3,21 finds extensive use in various electronic devices and circuits, including: - Voltage Regulator Circuits - Overvoltage Protection Circuits - Portable Electronics - Battery-Powered Devices

Detailed and Complete Alternative Models

• BZX84-C18: Similar voltage regulator diode with higher power dissipation capability.
• BZX84-B15: Lower voltage rating variant suitable for lower voltage applications.

In conclusion, the BZX84-B18/DG/B3,21 is a crucial electronic component that provides voltage regulation and protection in diverse electronic applications, despite its limitations in high-power scenarios. Its compact size and stable performance make it a popular choice for designers seeking efficient voltage regulation solutions.

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