AZ23C24-E3-18

Overview

The AZ23C24-E3-18 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in a surface-mount SOT-23 package. It provides two independent Zener diodes sharing a common anode terminal within a single component. The nominal Zener voltage is 24 V with a standard tolerance of ±5%, tested at a current of 5 mA. Maximum reverse leakage current is specified at 0.05 µA when measured at 18 V. Dynamic resistance (ZZ) is limited to 70 Ω at the test current, while knee dynamic resistance (ZZK) is 220 Ω at 1 mA. The device operates across a temperature range of -55 °C to +150 °C and dissipates up to 300 mW on a recommended FR-4 footprint.

Feature Summary

• Dual common anode configuration integrates two Zener diodes into a single compact SOT-23 package for space-constrained designs.
• Zener voltages follow international E24 grading standards with standardized ±5% tolerance for consistent performance.
• ESD protection capability exceeds 8 kV via human body model and 800 V via machine model according to AEC-Q101 guidelines.

Applications

• Voltage reference circuits requiring dual stable potential levels
• Overvoltage protection for differential signal lines
• Clamping applications in low-power electronic systems

Procurement Notes

Verify that the ordering code matches the exact suffix requirements for reel size and tape width. Confirm RoHS compliance status by checking the base part number designation. Ensure the specific voltage tolerance grade aligns with circuit design specifications before finalizing procurement orders.

Selection Notes

Select this component when a dual Zener solution with a common anode topology is required in a small outline transistor package. Verify that the 24 V nominal voltage and ±5% tolerance meet the specific circuit requirements. Check thermal dissipation limits against expected operating conditions to ensure reliability within the specified junction temperature range.

Part Context

This device belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series offers a wide range of graded Zener voltages from 2.2 V to 75 V in both single and dual configurations. The AZ23C24 variant specifically targets applications needing precise dual voltage regulation or clamping functions in a minimal footprint.

Replacement Considerations

Direct replacements include other AZ23 series parts with identical dual common anode configurations. Cross-reference with equivalent dual Zener arrays from other manufacturers ensuring matching SOT-23 pinouts and similar electrical characteristics such as voltage tolerance and power dissipation ratings.

FAQ

What is the maximum reverse leakage current for the AZ23C24-E3-18?

The maximum reverse leakage current is 0.05 µA, measured at a reverse voltage of 18 V.

Does the AZ23C24-E3-18 have automotive qualification?

No, the base P/N-E3 is commercial grade. Automotive qualification (AEC-Q101) is available only for the HE3_A suffix variants.

What is the dynamic resistance specification at the test current?

The dynamic resistance (ZZ) is specified as a maximum of 70 Ω at the test current of 5 mA.