ZHT431C02STOB

Overview

The ZHT431C02STOB is a three-terminal adjustable precision shunt regulator manufactured by Diodes Incorporated. It provides temperature-compensated reference voltage with an initial accuracy of 2% and a maximum temperature coefficient of 67 ppm/°C. The device operates within a wide temperature range from -55°C to +125°C and supports cathode currents up to 100mA. Output voltage is programmable between 2.5V and 20V using external resistors. It utilizes a TO-92 package.

Feature Summary

• Temperature compensated for operation over the full specified temperature range
• Programmable output voltage via two external divider resistors
• Capable of handling output current up to 100mA

Applications

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

Procurement Notes

Verify component authenticity through authorized channels. Confirm that the specific suffix matches the required tolerance and package type. Check for RoHS compliance status as indicated in official documentation. Ensure storage conditions adhere to manufacturer guidelines to maintain performance integrity prior to assembly.

Selection Notes

Select this component when a stable, adjustable reference voltage is required across extreme temperatures. The TO-92 package suits through-hole designs needing robust thermal performance. Verify that the external resistor network allows the desired voltage setting within the 2.5V to 20V operational window while maintaining minimum regulation current requirements.

Part Context

This part belongs to the ZHT431 family of adjustable precision Zener shunt regulators. The family includes variants with different tolerances (0.5%, 1%, 2%) and packages (SOT23, SOT223). The ZHT431C02STOB specifically denotes the 2% tolerance version in a TO-92 through-hole configuration, offering a balance of precision and mechanical durability for industrial applications.

Replacement Considerations

Direct substitutes include other ZHT431 variants with matching 2% tolerance such as ZHT431C02L or ZHT431C02STZ. Cross-package replacements like ZHT431F02TA require circuit board modification due to surface mount packaging differences.