AZ23B20-HE3_A-08

Overview

The AZ23B20-HE3_A-08 is a dual common anode Zener diode array manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 20 V with a tight tolerance of ±2%. The device operates within a test current range of 1 to 5 mA and exhibits a maximum reverse leakage current of 0.05 µA at 15 V. Dynamic resistance is specified at 50 Ω, while the temperature coefficient ranges from 8 to 10 x 10⁻⁴/°C. Rated for power dissipation up to 500 mW, it supports an operating temperature range of -55 °C to +150 °C and is housed in a compact SOT-23 package.

Feature Summary

• Dual common anode configuration providing two independent Zener references in a single surface-mount package
• AEC-Q101 qualified for automotive applications ensuring high reliability under rigorous environmental conditions
• Tight ±2% Zener voltage tolerance for precision voltage regulation requirements
• ESD protection capability exceeding 8 kV via human body model and 800 V via machine model

Applications

• Automotive electronic circuits requiring AEC-Q101 compliance
• Precision voltage reference generation in signal conditioning systems
• Overvoltage protection for sensitive input lines
• Clamping circuits in communication equipment

Procurement Notes

Verify that the ordering code includes the HE3_A suffix to confirm AEC-Q101 qualification status. Ensure the tape and reel packaging matches the required quantity specifications for automated assembly processes. Cross-reference the specific suffix against official Vishay documentation to validate RoHS compliance and material categorization before finalizing procurement orders.

Selection Notes

Select this component when a dual Zener array with strict ±2% voltage tolerance is required. The HE3_A designation indicates automotive-grade qualification suitable for harsh environments. Verify that the 500 mW power dissipation rating aligns with the thermal design constraints of the target application board layout.

Part Context

This part belongs to the AZ23 series of small signal Zener diodes produced by Vishay Semiconductors. The series offers a wide range of Zener voltages from 2.2 V to 75 V. The AZ23B20 variant specifically targets applications needing precise 20 V regulation with enhanced tolerance compared to standard commercial grade devices.

Replacement Considerations

AZ23B20-E3-08 (Commercial Grade)

FAQ

What is the difference between the AZ23B20-HE3_A-08 and AZ23B20-E3-08?

The AZ23B20-HE3_A-08 is AEC-Q101 qualified for automotive applications, whereas the AZ23B20-E3-08 is a commercial grade device without this specific automotive qualification.

What does the 'B' indicate in the part number AZ23B20?

The 'B' indicates a Zener voltage tolerance of ±2%, offering higher precision than the 'C' variant which has a ±5% tolerance.

What is the maximum power dissipation rating?

The maximum power dissipation is 500 mW, provided the thermal resistance junction-to-lead is maintained at 250 K/W.