ZHT431F02TC

Overview

The ZHT431F02TC is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides excellent temperature stability with an output current handling capability of up to 100mA and operates across an extended temperature range from -55°C to +125°C. The device features a maximum temperature coefficient of 67ppm/°C and offers a 2% tolerance on the reference voltage. Its programmable output voltage can be set to any value between 2.5V and 20V using two external divider resistors, making it suitable for replacing standard zener diodes where improved performance is required.

Feature Summary

• Surface mount SOT23 (Type DN) package
• Temperature compensated for full range operation
• Low output noise
• Totally lead-free and fully RoHS compliant

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required tolerance level and packaging format before procurement. Confirm that the component meets all applicable environmental directives relevant to your manufacturing region. Ensure compatibility with existing surface mount assembly processes. Review the manufacturer's quality definitions regarding halogen and antimony-free status if required by internal specifications.

Selection Notes

Select this component when a precise, adjustable voltage reference is needed in a compact surface mount footprint. Consider its wide operating temperature range for applications exposed to extreme thermal conditions. Evaluate the 2% tolerance against circuit requirements to ensure adequate accuracy without unnecessary cost. Assess the low dynamic output impedance benefits for stable regulation in sensitive analog or digital control loops.

Part Context

This part belongs to the ZHT431 family of adjustable precision shunt regulators designed as high-performance alternatives to traditional zener diodes. The series is characterized by tight temperature compensation and low noise, addressing limitations found in standard discrete components. It is widely utilized in power management and signal conditioning circuits requiring reliable voltage referencing.

Replacement Considerations

ZHT431F01TA and ZHT431FMTA are confirmed substitutes within the same family offering different tolerance levels.