IN4742A Zener Diode 12v

The 1N4742A is a Zener diode designed to provide a stable reference voltage of 12V with a power dissipation capability of 1W. This Zener diode is suitable for applications requiring accurate voltage regulation, voltage referencing, and protection against overvoltage conditions. It offers reliable performance for general-purpose circuits. 

Key Features:

• Nominal Zener Voltage: 12V
• Power Dissipation: 1W
• Tight tolerance for precise voltage regulation
• Low leakage current
• High stability and reliability
• Axial-leaded design for easy PCB mounting

Technical Specifications:

• Zener Voltage (Vz): 12V
• Test Current (Iz): 35mA
• Maximum Zener Impedance (Zz): 30 ohms at Iz
• Maximum Reverse Leakage Current (Ir): 0.5µA at Vr = 8V
• Power Dissipation (Pd): 1W
• Operating Temperature Range: -65°C to +200°C
• Package Type: DO-41 (Axial)
• Dimensions: Length: 4.5mm, Diameter: 2.0mm (approx.)

Applications:

• Voltage Regulation: Provides a stable reference voltage for various circuits.
• Overvoltage Protection: Protects sensitive electronic components from voltage spikes.
• Voltage Clamping: Limits the voltage to a specific value to protect circuits.
• Signal Conditioning: Used in waveform clipping and shaping circuits.
• Reference Voltage: Provides a precise reference voltage in measurement and control systems.

Usage:

1. Identify the correct placement for the Zener diode in your circuit based on the schematic.
2. Ensure the Zener diode’s voltage and power rating match the circuit’s requirements.
3. Solder the Zener diode into place, observing proper polarity (cathode marked with a band).
4. Test the circuit to verify the Zener diode is functioning as expected.

Caution:

• Ensure the Zener diode's power rating is not exceeded to prevent overheating and failure.
• Handle with care to avoid damaging the diode during installation.
• Verify the Zener diode's specifications match the requirements of your application.