1N5742B

Single Zener Diodes Overview

The 1N5742B is a silicon Zener diode manufactured by Microchip Technology, housed in the DO-35 axial leaded package. It provides an 18V nominal Zener voltage with a tolerance of ±5%. The device is rated for a maximum power dissipation of 500mW at ambient temperature. It operates within a standard temperature range and serves as a general-purpose voltage reference or regulator component in electronic circuits.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation using silicon Zener breakdown characteristics
• Utilizes a compact DO-35 axial leaded package for through-hole mounting
• Designed for general-purpose voltage reference applications

Single Zener Diodes Applications

• Voltage regulation in low-power circuits
• General-purpose voltage reference generation
• Overvoltage protection in signal lines

Single Zener Diodes Procurement Notes

Verify the manufacturer designation carefully, as Microchip acquired assets from companies like Microsemi and National Semiconductor that produced this part number. Confirm RoHS compliance status, as sources indicate both leaded and non-RoHS variants exist. Ensure the package matches the required DO-35 form factor and validate the 18V/500mW specifications against your specific circuit requirements before procurement.

Single Zener Diodes Selection Notes

Select this component when an 18V reference is required in a small axial package. Consider the 5% tolerance if higher precision is needed, look for alternative series. Verify thermal management capabilities for the 500mW rating in your specific enclosure environment to ensure reliable operation under load conditions.

Single Zener Diodes Part Context

This part belongs to the standard 1N57xx series of silicon Zener diodes. Originally associated with National Semiconductor and later Microsemi, these parts are now managed by Microchip Technology. The 1N5742B specifically denotes the 18V variant within this widely used family of general-purpose voltage regulators.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N5742 from other manufacturers such as New Jersey Semi-Conductor or Vishay. Ensure substitute components match the 18V Zener voltage, 500mW power rating, and DO-35 package dimensions for direct replacement.