AZ23C43-E3-18

Overview

The AZ23C43-E3-18 is a dual common anode silicon planar Zener diode array from the Vishay AZ23 series, housed in a SOT-23 surface-mount package. It features a nominal Zener voltage of 43 V with a ±5% tolerance and a maximum power dissipation of 300 mW on an FR-4 board. The device operates within a temperature range of -55 °C to +150 °C and exhibits a reverse leakage current of 50 μA at 32 V. Electrical characteristics include a dynamic resistance (ZZ) of 97 Ω at a test current of 2 mA and a temperature coefficient ranging from 10 to 1 × 10⁻⁴/°C.

Feature Summary

• Dual common anode configuration for space-efficient circuit designs
• Graded Zener voltages conforming to international E24 standards
• ESD protection capability exceeding 8 kV via human body model

Applications

• Voltage reference circuits requiring stable dual-channel regulation
• Clamping applications in signal processing paths
• Overvoltage protection stages in compact electronic modules

Procurement Notes

Verify the specific ordering code suffix against official manufacturer documentation to confirm tape-and-reel specifications and minimum order quantities. Ensure that the commercial grade designation aligns with project requirements, as automotive-grade variants utilize distinct HE3_A suffixes. Cross-reference datasheet revision dates to validate parameter accuracy prior to procurement.

Selection Notes

Select this component when a dual Zener array with a 43 V nominal rating and ±5% tolerance is required in a SOT-23 footprint. Confirm that the 300 mW power dissipation limit on standard FR-4 substrates meets thermal constraints. Evaluate the 97 Ω dynamic resistance and specified leakage currents against circuit sensitivity requirements before finalizing the design.

Part Context

This part belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay General Semiconductor - Diodes Division. The series offers various voltage grades and tolerance options, including ±2% variants designated with a 'B' prefix. The E3 suffix indicates RoHS compliance for commercial grade applications, while the -18 suffix specifies the 10,000-unit reel packaging format.

Replacement Considerations

Publicly confirmed parameter-equivalent substitutes include AZ23B43-E3-18 for tighter tolerance requirements and AZ23C43-E3-08 for alternative reel packaging. Other manufacturers may offer functionally similar SOT-23 dual Zener arrays, but direct pin-compatible replacements must be verified against Vishay's electrical specifications.

FAQ

What is the dynamic resistance of the AZ23C43-E3-18?

The dynamic resistance (ZZ) is 97 Ω, measured at a test current (IZT1) of 2 mA.

Does the AZ23C43-E3-18 have AEC-Q101 qualification?

No, the base P/N-E3 is a commercial grade device. AEC-Q101 qualification is available only for parts with the HE3_A suffix.

What is the maximum reverse leakage current specified?

The maximum reverse leakage current is 50 μA, tested at a reverse voltage (VR) of 32 V.