AZ23B68-HE3_A-08

Overview

The Vishay AZ23B68-HE3_A-08 is a dual common anode silicon planar Zener diode array housed in an SOT-23 package. It features a nominal Zener voltage of 68 V with a tight tolerance of ±2%. The device is AEC-Q101 qualified for automotive applications and offers high ESD protection exceeding 8 kV via the human body model. Electrical characteristics include a maximum reverse leakage current of 51 μA at 51 V, a dynamic resistance of 200 Ω at a test current of 2 mA, and a temperature coefficient ranging from 10 to 12 × 10⁻⁴/°C. It operates within a junction temperature range of -55 °C to +150 °C.

Feature Summary

• Dual common anode configuration for space-efficient circuit designs
• AEC-Q101 qualification ensuring reliability in automotive environments
• High electrostatic discharge robustness exceeding 8 kV (HBM) and 800 V (MM)
• Tight ±2% Zener voltage tolerance for precision regulation

Applications

• Automotive voltage reference circuits
• Precision signal conditioning networks
• Electrostatic discharge protection stages

Procurement Notes

Verify component authenticity by cross-referencing the manufacturer's part number against official Vishay documentation. Confirm that the HE3_A suffix corresponds to RoHS compliance and AEC-Q101 qualification status. Ensure the ordering code matches the specific ±2% tolerance variant required for the application design specifications.

Selection Notes

Select this component when a dual common anode topology is required alongside strict voltage accuracy. The ±2% tolerance distinguishes it from standard commercial grade parts. Verify that the 200 Ω dynamic resistance meets the impedance requirements of the target load line and operating frequency conditions.

Part Context

This part belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series utilizes silicon planar technology and is available in various voltage grades following the E24 standard. The specific suffix indicates automotive-grade qualification and lead-free packaging compliant with international environmental standards.

Replacement Considerations

AZ23B68-E3-08

FAQ

What is the specific meaning of the 'B' designation in the part number?

The 'B' indicates a Zener voltage tolerance of ±2%, which is tighter than the standard ±5% tolerance found in the 'C' graded variants.

How does the common anode configuration function electrically?

Both Zener diodes share a single anode terminal, allowing them to be used together or independently while requiring fewer connection points on the printed circuit board.

What are the thermal limitations for surface mount operation?

The maximum power dissipation is limited to 300 mW when mounted on an FR-4 board with the recommended soldering footprint, with a maximum junction temperature of 150 °C.