ZHT431C01STZ

Overview

The ZHT431C01STZ is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides excellent temperature stability and an output current handling capability up to 100mA. The device operates within an extended temperature range of -55°C to +125°C. Its programmable output voltage can be set to any value between 2.5V and 20V using two external divider resistors. This component serves as a high-performance replacement for standard zener diodes in applications requiring improved regulation accuracy.

Feature Summary

• Offers programmable output voltage via external resistor network
• Provides extended operating temperature range from -55°C to +125°C
• Features low dynamic output impedance and low output noise
• Delivers current sink capability ranging from 50mA to 100mA

Applications

• Series and shunt voltage regulators
• Voltage monitoring circuits
• Over-voltage and under-voltage protection systems
• Switch mode power supplies

Procurement Notes

Verify the specific ordering suffix to confirm package type, tolerance, and availability status. The ZHT431C01STZ variant utilizes a TO-92 package with 1% initial tolerance. Confirm that the procurement channel is authorized to ensure product authenticity and compliance with RoHS standards. Check datasheet revision history for potential updates to electrical characteristics or pinout configurations before finalizing supply agreements.

Selection Notes

Select this component when precise voltage reference stability across wide temperature extremes is required. The TO-92 through-hole package facilitates easy integration into legacy designs replacing discrete zener diodes. Ensure the application circuit accommodates the minimum cathode current requirements for proper regulation. Consider the 1% tolerance specification if tighter voltage accuracy than standard zeners is necessary for the design.

Part Context

The ZHT431 series represents an evolution of the classic TL431 architecture, optimized for higher reliability and broader industrial temperature ranges. Manufactured by Diodes Incorporated, these devices are part of a family of adjustable shunt regulators designed for cost-effective precision referencing. The ZHT431C01STZ specifically targets applications demanding robust performance in harsh thermal environments while maintaining compact form factors.

Replacement Considerations

This component is explicitly documented as a direct replacement for standard zener diodes in applications requiring improved performance characteristics. Designers should verify that the existing circuit topology supports the programmable nature of the shunt regulator rather than relying on fixed breakdown voltages typical of passive zener components.