BZX84C4V7 – PHILIPS

Overview

The Diotec Semiconductor BZX84C4V7 is a highly stable 4.7V Zener diode designed for precise voltage regulation in compact SOT-23 surface-mount packages. Its critical operational characteristic lies in its tight 5% voltage tolerance, ensuring consistent reference voltages crucial for analog circuitry. A key design consideration when employing this diode is managing its 300mW power dissipation; exceeding this limit, especially under continuous high current conditions, can lead to thermal runaway and premature failure, necessitating careful thermal design and current limiting.

Key Features

• Zener Voltage (Vz): 4.7 V
• Power Dissipation (Pd): 300 mW
• Voltage Tolerance: ±5%
• Maximum Reverse Leakage Current (Ir): 3 µA @ Vz=4.7V
• Zener Impedance (Zz): 80 Ohms @ Iz=5mA
• Package: SOT-23 (2.9mm x 1.3mm x 1.1mm)

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Precision voltage reference generation for ADCs and DACs
• Overvoltage protection clamping in sensitive signal paths
• Low-power voltage stabilization in battery-operated devices
• Bias voltage setting for active RF components