3.3V Zener Diode 1N4728A (5 Pcs)

The 1N4728A is a 3.3V, 1W Zener diode designed for voltage regulation, voltage reference, overvoltage protection, and voltage clamping applications. Operating in reverse bias, it maintains a stable 3.3V output, making it ideal for power supplies, microcontroller circuits, Arduino projects, industrial electronics, and DIY applications. It is packaged in a DO-41 through-hole package for easy installation on PCBs and breadboards.

Features

• Full Name: 1N4728A 3.3V 1W Zener Diode
• 3.3V nominal Zener voltage
• 1W power dissipation
• ±5% voltage tolerance
• Low leakage current
• High reliability and stability
• Through-hole DO-41 package
• Suitable for voltage regulation and protection circuits

Specifications

Note: The diode provides a stable 3.3V output only when connected in reverse bias with a suitable series current-limiting resistor.

Pin Configuration

Note: The silver/gray band on the diode body indicates the Cathode (K) terminal.

Applications

• Voltage regulation
• Voltage reference circuits
• 3.3V power supply protection
• Arduino and ESP8266/ESP32 projects
• Microcontroller circuits
• Sensor interface circuits
• Industrial electronics
• Battery-powered devices
• DIY electronics projects

Advantages

• Stable 3.3V output
• High reliability
• Low power consumption
• Compact through-hole package
• Easy to install
• Cost-effective
• Long operational life

Size

Package Includes

• 5 × 3.3V Zener Diode (1N4728A)

Note: Always use a series resistor to limit the current through the Zener diode. The 1N4728A is intended for voltage regulation and protection applications rather than standard rectification. Ensure that the 1W maximum power dissipation rating is not exceeded for safe, reliable, and long-lasting operation.