The SMPZ3928B-E3/84A is a surface-mount Zener diode manufactured by Vishay. It's designed for voltage regulation and transient voltage suppression in various electronic circuits. As a Zener diode, it maintains a stable voltage across its terminals when reverse biased, making it ideal for protecting sensitive components from voltage spikes and surges. The SMPZ3928B-E3/84A is characterized by its compact size and reliable performance in a wide range of applications.

Applications

• Voltage Regulation: Used in voltage regulator circuits to maintain a stable output voltage.
• Transient Voltage Suppression (TVS): Employed as a TVS diode to protect sensitive components from voltage transients, such as those caused by electrostatic discharge (ESD) or inductive load switching.
• Overvoltage Protection: Integrated into circuits to provide overvoltage protection for microcontrollers, operational amplifiers, and other sensitive ICs.
• Clamping Circuits: Used in clamping circuits to limit voltage levels to a safe range.
• Signal Line Protection: Protects signal lines from voltage spikes in communication and data transmission circuits.
• Power Supply Protection: Provides protection against overvoltage conditions in power supplies.

Features

• Surface Mount Package: Comes in a small surface-mount package (typically a SOD-323 or similar), making it suitable for high-density PCB layouts.
• Precise Zener Voltage: Offers a precise Zener voltage for accurate voltage regulation.
• Low Leakage Current: Exhibits a low leakage current, minimizing power losses in the circuit.
• Fast Response Time: Provides a fast response time to transient voltage events, ensuring effective protection.
• High Surge Capability: Can handle high surge currents, making it suitable for protecting against ESD and other transient events.
• RoHS Compliant: Complies with RoHS standards, making it environmentally friendly.

Benefits

• Effective Voltage Regulation: Provides stable and reliable voltage regulation for sensitive circuits.
• Robust Transient Protection: Protects against voltage transients, preventing damage to sensitive components.
• Compact Size: Small surface-mount package saves valuable board space.
• Low Power Consumption: Low leakage current minimizes power losses and improves energy efficiency.
• Easy to Use: Simple to implement in circuit designs, requiring minimal external components.
• Environmentally Friendly: RoHS compliance ensures it meets environmental standards.

Additional Details

The SMPZ3928B-E3/84A has a Zener voltage (VZ), reverse leakage current (IR), and forward voltage (VF). It is designed to operate within a specified temperature range. Proper PCB layout techniques should be used to minimize inductance and improve transient voltage suppression performance. The datasheet provides detailed electrical characteristics, thermal resistance values, and soldering recommendations for optimal performance. It's available in tape and reel packaging for automated assembly.