UDZSTE-174.3B

Single Zener Diodes Overview

The UDZSTE-174.3B is a single-channel Zener diode manufactured by ROHM Semiconductor, designed for surface-mount applications in the SOD-323 package. It features a nominal Zener voltage of 4.3 V with a tight tolerance of ±2%. The device supports a maximum power dissipation of 200 mW and operates within a junction temperature range up to +150 °C. Key electrical characteristics include a test current of 5 mA, a maximum Zener impedance of 100 Ω, and a maximum reverse leakage current of 5 µA. This component is suitable for precision voltage regulation tasks requiring compact footprint and high reliability.

Single Zener Diodes Feature Summary

• Provides stable voltage reference with ±2% tolerance for precision regulation
• Compact SMD design enables automated assembly in space-constrained layouts
• High thermal stability supports operation at elevated junction temperatures

Single Zener Diodes Applications

• Voltage reference circuits in portable electronic devices
• Over-voltage protection stages in consumer electronics
• Biasing networks in signal conditioning modules

Single Zener Diodes Procurement Notes

Verify the specific suffix 'B' indicates the ±2% tolerance variant, as standard versions may differ. Confirm the SOD-323 package code matches your PCB footprint requirements. Ensure the 200 mW power rating aligns with your thermal management strategy under continuous operation conditions.

Single Zener Diodes Selection Notes

Select this component when a low-tolerance voltage reference is required in a minimal surface-mount footprint. Compare against higher-power variants if thermal dissipation exceeds 200 mW. Consider the Zener impedance value for dynamic load regulation performance in sensitive analog circuits.

Single Zener Diodes Part Context

This part belongs to ROHM's general-purpose Zener diode lineup, optimized for cost-effective mass production. The UDZSTE series utilizes standard silicon planar technology. It serves as a fundamental passive component for voltage clamping and reference generation in industrial and consumer hardware designs.

Single Zener Diodes Replacement Considerations

Public confirmed substitute: BZX84J-B4V3,115 (Nexperia). Verify pinout compatibility and ensure the replacement meets the ±2% tolerance and 200 mW power dissipation specifications.