AZ23B33-HE3-08

Overview

The AZ23B33-HE3-08 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in an SOT-23 package. It features a nominal Zener voltage of 33 V with a tight tolerance of ±2%. The device operates within a junction temperature range of -55 °C to +150 °C and supports a maximum power dissipation of 500 mW on lead-mounted configurations or 300 mW on FR-4 boards. It is AEC-Q101 qualified for automotive reliability standards.

Feature Summary

• Dual common anode configuration integrating two Zener diodes in a single compact surface-mount package
• AEC-Q101 qualification ensuring compliance with automotive electronic component stress testing requirements
• High electrostatic discharge (ESD) protection capability exceeding 8 kV via human body model and 800 V via machine model

Applications

• Automotive circuitry requiring robust voltage regulation under strict environmental conditions
• Protection circuits utilizing high ESD immunity for sensitive signal lines
• Dual-channel reference voltage generation using shared anode topology

Procurement Notes

Verify that the ordering code strictly matches AZ23B33-HE3-08 to confirm the specific combination of 33 V nominal voltage, ±2% tolerance, and AEC-Q101 automotive qualification. Confirm the suffix indicates the HE3_A variant packaging format and ensure the supplier provides traceability documentation for RoHS compliance and material categorization as defined by Vishay standards.

Selection Notes

Select this component when a dual Zener array with precise ±2% voltage tolerance is required for automotive applications. Ensure the design accommodates the 300 mW power dissipation limit on standard PCB footprints. Verify that the common anode configuration aligns with the circuit topology, as it requires a shared positive terminal for both diode channels.

Part Context

This part belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series offers various voltage grades based on the E24 standard and includes options for commercial grade (E3) and automotive qualified (HE3_A) variants. The AZ23B33-HE3-08 specifically represents the high-reliability automotive tier with tighter voltage tolerances compared to the standard C-series parts.

Replacement Considerations

AZ23B33-E3-08: Identical electrical specifications but lacks AEC-Q101 automotive qualification. AZ23B33-HE3_A-08: Automotive qualified equivalent; verify if the specific tape-and-reel packaging designation differs.