AZ431LBZTR-E1

Overview

The AZ431LBZTR-E1 is a low voltage adjustable precision shunt regulator from the AZ431L series by Diodes Incorporated. It operates as a three-terminal device with an output voltage range of 1.24 V to 18 V. The component features an initial accuracy of 1% and a typical temperature coefficient of 20 ppm/°C. Maximum cathode current is 100 mA, with a minimum operating current of 100 µA. It supports a maximum input voltage of 18 V and functions within a temperature range of -40°C to +125°C. The unit is housed in a TO-92-3 through-hole package.

Feature Summary

• Adjustable precise output voltage programmable between 1.24 V and 18 V using two external resistors
• High stability under capacitive load conditions
• Low temperature deviation for consistent thermal performance
• Sharp turn-on characteristics suitable for switching applications

Applications

• Switching power supply regulation
• Battery charger circuits
• Motherboard voltage reference
• General purpose adjustable regulators

Procurement Notes

Verify component status carefully as this part may be subject to discontinuance. Check official Product Change Notifications (PCN) and End-of-Life (EOL) notices from Diodes Incorporated for validity. Confirm RoHS3 compliance and REACH status before procurement. Ensure sourcing channels provide authentic documentation matching the specific suffix and package type.

Selection Notes

Select this component when a low-voltage, high-precision shunt reference is required in a through-hole package. The 1% tolerance and 20 ppm/°C coefficient suit applications demanding stable reference voltages. Compare against SOT-23 variants if surface mount space is limited. Ensure circuit design accommodates the 100 µA minimum cathode current requirement for proper regulation.

Part Context

This device belongs to the AZ431L family of low voltage adjustable precision shunt regulators. It serves as a direct replacement for standard Zener diodes in many linear and switching applications. The series offers improved stability and lower temperature coefficients compared to traditional discrete Zener solutions. Other packages in the family include SOT-23 and SOT-89 configurations.

Replacement Considerations

AZ431LAZTR-G1 is listed as a parameter equivalent substitute.