AZ23B33-HE3-18

Overview

The AZ23B33-HE3-18 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in a SOT-23 surface-mount 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. It is AEC-Q101 qualified for automotive applications and offers high ESD protection capability exceeding 8 kV via the human body model.

Feature Summary

• Dual common anode configuration providing two independent Zener references in a single compact package
• AEC-Q101 qualification ensuring reliability for demanding automotive electronic environments
• High electrostatic discharge robustness exceeding 8 kV (HBM) and 800 V (MM)
• Tight voltage tolerance of ±2% for precise reference applications

Applications

• Automotive circuit voltage regulation and clamping
• Precision voltage reference generation in dual-channel designs
• Electrostatic discharge (ESD) protection for sensitive signal lines

Procurement Notes

Verify that the ordering suffix matches the required tape-and-reel packaging format and quantity. Confirm the specific AEC-Q101 qualification status if automotive compliance is mandatory for the target application. Ensure the component meets RoHS directives as indicated by the HE3 suffix before finalizing procurement specifications.

Selection Notes

Select this part when a dual Zener array with a 33 V rating and ±2% tolerance is required. The HE3 suffix indicates AEC-Q101 qualification, distinguishing it from commercial grade variants. Verify that the SOT-23 footprint and thermal characteristics align with the board layout constraints and ambient operating conditions.

Part Context

This component belongs to the Vishay AZ23 series of small signal Zener diodes. The series provides various voltage options graded to the E24 standard. The 'B' designation specifies the tighter ±2% tolerance band, while the 'HE3' suffix denotes AEC-Q101 automotive qualification and lead-free construction.

Replacement Considerations

AZ23B33-E3-18: Commercial grade equivalent without AEC-Q101 qualification. AZ23B33-G3-18: Alternative lead-free variant; verify specific automotive qualification requirements against datasheet definitions.