AZ23B51-HE3-18

Overview

The AZ23B51-HE3-18 is a silicon planar Zener diode array from the Vishay AZ23 series, housed in an SOT-23 surface-mount package. It features a dual common-anode configuration with a nominal Zener voltage of 51 V and 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 300 mW on an FR-4 board. It is AEC-Q101 qualified for automotive reliability and supplied in tape-and-reel packaging.

Feature Summary

• AEC-Q101 qualified for automotive-grade reliability
• Dual common-anode configuration for compact circuit design
• Tight ±2% Zener voltage tolerance for precision applications
• ESD protection exceeding 8 kV (HBM) and 800 V (MM)

Applications

• Automotive voltage regulation circuits
• Precision reference voltage generation
• Transient voltage suppression in sensitive electronics

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm compliance requirements. Confirm that the HE3_A designation aligns with project specifications for AEC-Q101 qualification. Ensure the -18 suffix matches the required reel quantity and tape width for automated assembly processes.

Selection Notes

Select this component when a dual Zener array with high voltage stability is required in a small footprint. The ±2% tolerance makes it suitable for applications demanding precise voltage clamping. Verify that the 300 mW power rating on standard PCB footprints meets the thermal management requirements of the target system.

Part Context

This part belongs to the Vishay AZ23 series of small signal Zener diodes. The series offers a wide range of voltages from 2.2 V to 75 V. The 'B' indicates the tighter 2% tolerance grade, while 'HE3' denotes the AEC-Q101 qualified variant. The '-18' suffix specifies the 10,000-unit reel packaging format.

Replacement Considerations

AZ23B51-E3-18: Commercial grade equivalent without AEC-Q101 qualification.