AZ23C27-HE3_A-08

Overview

The AZ23C27-HE3_A-08 is a dual common anode small signal Zener diode array manufactured by Vishay Semiconductors. It features a nominal Zener voltage of 27 V with a ±5% tolerance, tested at a current of 2 mA. The device operates within a temperature range of -55 °C to +150 °C and provides an ESD protection capability exceeding 8 kV via the human body model. Packaged in a compact SOT-23-3 surface-mount housing, it is AEC-Q101 qualified for automotive applications.

Feature Summary

• Dual common anode configuration providing two independent Zener references in a single package
• AEC-Q101 qualification ensuring reliability for demanding automotive electronic environments
• High electrostatic discharge robustness exceeding 8 kV according to the human body model standard

Applications

• Automotive circuitry requiring dual voltage reference points
• Protection of sensitive input lines against transient overvoltage events
• Precision analog signal conditioning circuits utilizing stable reference voltages

Procurement Notes

Verify that the specific ordering code matches the required tolerance and qualification level. Confirm the suffix indicates the HE3_A variant for AEC-Q101 compliance. Ensure the tape and reel packaging aligns with automated assembly requirements. Cross-reference the manufacturer's latest documentation for any potential revisions or updates to the component specifications.

Selection Notes

Select this component when a dual common anode topology is necessary for space-constrained designs. The HE3_A suffix denotes AEC-Q101 qualification, making it suitable for automotive systems. Verify that the 27 V nominal voltage and 5% tolerance meet the specific circuit requirements. Consider the SOT-23 footprint constraints during the PCB layout phase.

Part Context

This part belongs to the AZ23 series of silicon planar Zener diodes from Vishay. The series offers various voltage grades based on the E24 standard. The HE3_A designation specifically identifies the automotive-grade version compliant with AEC-Q101 standards, distinguishing it from the commercial grade E3 variants.

Replacement Considerations

AZ23C27-E3-08 (Commercial grade equivalent)

FAQ

What is the maximum power dissipation rating?

The absolute maximum power dissipation is 500 mW when mounted on a board with a recommended soldering footprint.

How is the dynamic resistance specified?

The dynamic resistance (ZZ) is measured at a frequency of 1 kHz under specific test conditions defined in the electrical characteristics table.

What does the 'C' indicate in the part number?

The letter 'C' signifies a standard Zener voltage tolerance of ±5%. Replacing it with 'B' would indicate a tighter ±2% tolerance.