RD18E-TB-AZ

Single Zener Diodes Overview

The RD18E-TB-AZ is a single Zener diode manufactured by Renesas Electronics Corporation. It features an 18V nominal Zener voltage and a maximum power dissipation of 500mW. The device is constructed using silicon technology and housed in a DO-35 axial leaded package. It functions as a unidirectional voltage regulator diode designed for stable voltage reference applications.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at a fixed 18V reference level
• Utilizes silicon-based construction for reliable performance
• Designed for unidirectional current flow in voltage regulation circuits

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• General-purpose voltage regulation

Single Zener Diodes Procurement Notes

Verify the exact suffix (TB-AZ) against official Renesas documentation to confirm package type and tape/reel specifications. Ensure RoHS compliance status matches project requirements. Cross-reference with authorized distributors to confirm current availability and authenticity, as component markings may vary slightly between manufacturing lots.

Single Zener Diodes Selection Notes

Select this component when an 18V Zener voltage with 500mW power handling is required in a DO-35 package. Consider thermal management capabilities within the specific circuit layout. Verify that the unidirectional characteristic aligns with the circuit's polarity requirements and that the silicon construction meets environmental operating conditions.

Single Zener Diodes Part Context

This part belongs to Renesas' discrete Zener diode portfolio, specifically the RD18E series. These components are standard passive semiconductor devices used for basic voltage clamping and referencing. The DO-35 package indicates a glass-passivated junction suitable for through-hole mounting on printed circuit boards.

Single Zener Diodes Replacement Considerations

The RD18EB3 is a confirmed substitute part number within the same family, offering identical 18V and 0.5W specifications in the DO-35 package. Verify pinout compatibility and tolerance levels before substitution.