12V Zener Diode 1N4742A (5 Pcs)

The 1N4742A is a 12V, 1W Zener diode designed for voltage regulation, voltage reference, overvoltage protection, and voltage clamping applications. Operating in reverse bias, it maintains a stable 12V output, making it suitable for power supplies, battery chargers, Arduino projects, industrial electronics, and DIY circuits. The diode comes in a DO-41 through-hole package for easy PCB mounting.

Features

• Full Name: 1N4742A 12V 1W Zener Diode
• 12V nominal Zener voltage
• 1W power dissipation
• ±5% voltage tolerance
• Low leakage current
• High reliability and stability
• Through-hole DO-41 package
• Ideal for voltage regulation and protection

Specifications

Note: The diode regulates at 12V only when connected in reverse bias with an appropriate 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
• Overvoltage protection
• Power supply circuits
• Battery chargers
• Voltage clamping
• Arduino and microcontroller projects
• Industrial electronics
• DIY electronics projects

Advantages

• Stable 12V output
• Low leakage current
• High reliability
• Compact through-hole package
• Easy to install
• Cost-effective
• Long operational life

Size

Package Includes

• 5 × 12V Zener Diode (1N4742A)

Note: Always use a series resistor to limit the current through the Zener diode. The 1N4742A is intended for voltage regulation and protection applications, not for standard rectification. Ensure that the 1W power dissipation rating is not exceeded during operation.