1N4745A

Overview

The Lumimax Optoelectronic Technology 1N4745A is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 16V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1W and operates within a junction temperature range up to 200°C. It utilizes a DO-41 glass package with axial leads, ensuring compatibility with standard through-hole mounting techniques.

Feature Summary

• Glass passivated junction construction for enhanced stability
• Low Zener impedance and low regulation factor for precise voltage control
• High temperature soldering capability guaranteed at 260°C

Applications

• Voltage reference circuits
• Overvoltage protection stages
• Clipper and clamper circuits

Procurement Notes

Verify the manufacturer designation matches Lumimax Optoelectronic Technology, as the 1N4745A is a standardized JEDEC part number produced by multiple vendors. Confirm the package type is DO-41 and check for specific marking codes or polarity band indicators on the physical component to ensure authenticity and correct orientation during assembly.

Selection Notes

Select this component when a stable 16V reference is required in a through-hole design. Ensure the circuit can handle the 1W power dissipation rating and that the operating ambient temperature remains within limits to prevent thermal derating issues. Verify that the ±5% tolerance meets the system's precision requirements.

Part Context

This component belongs to the 1N47xxA series of Zener diodes, which covers a wide voltage range from 3.3V to 75V. The 'A' suffix specifically denotes a ±5% voltage tolerance. These devices are commonly used in general-purpose electronics where reliable voltage regulation is needed in a robust, hermetically sealed glass package.

Replacement Considerations

Cross-reference with other manufacturers offering the 1N4745A specification, such as Fairchild, Vishay, or Panjit, ensuring identical DO-41 packaging and electrical characteristics.