AZ23B39-HE3-18

Overview

The AZ23B39-HE3-18 is a dual common anode Zener diode array manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 39 V with a tight tolerance of ±2%. The device operates within a test current range of 0.5 to 2 mA and provides a maximum reverse leakage current of 50 μA at 29 V. It has a dynamic resistance of 87 Ω at the test current and a temperature coefficient ranging from 10 to 12 x 10⁻⁴/°C. Rated for a maximum power dissipation of 300 mW on an FR-4 board, it functions reliably across an operating temperature range of -55 °C to +150 °C in a compact SOT-23 package.

Feature Summary

• Dual common anode configuration for space-efficient circuit designs
• High precision ±2% Zener voltage tolerance for accurate regulation
• Robust ESD protection exceeding 8 kV (HBM) and 800 V (MM)
• Extended thermal stability suitable for demanding environments

Applications

• Precision voltage reference circuits requiring tight tolerances
• Over-voltage protection stages in sensitive electronic systems
• Signal conditioning and clamping applications in automotive electronics

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the ordering suffix matches the required tape-and-reel quantity and RoHS compliance status. Ensure storage conditions adhere to moisture sensitivity level 1 guidelines to prevent soldering defects during surface mount assembly processes.

Selection Notes

Select this specific part when a 39 V breakdown voltage with ±2% accuracy is mandatory. The dual common anode structure allows for efficient use of PCB real estate compared to discrete components. Verify that the 300 mW power rating aligns with the expected thermal load in the target application environment.

Part Context

This component belongs to the AZ23 series of small signal Zener diodes. The 'B' designation indicates the tighter ±2% voltage tolerance grade, while the 'HE3' suffix denotes a lead-free, halogen-free variant compliant with modern environmental standards. The '-18' suffix specifies the standard 10,000-unit reel packaging format.

Replacement Considerations

AZ23B39-E3-18

FAQ

What is the dynamic resistance of the AZ23B39-HE3-18?

The dynamic resistance is specified as a maximum of 87 Ω when tested at a current of 0.5 mA.

Does this component meet automotive reliability standards?

Yes, the AZ23 series is available with AEC-Q101 qualification, ensuring suitability for automotive electronic applications.

How does the tolerance affect the Zener voltage range?

With a ±2% tolerance, the actual Zener voltage for the 39 V nominal value ranges from 38.22 V to 39.78 V.