DZ23C4V3-HE3-18

Overview

The DZ23C4V3-HE3-18 is a silicon planar Zener diode from the Vishay DZ23 series, housed in an SOT-23 surface-mount package. It features a nominal Zener voltage of 4.3 V with a ±5% tolerance and operates at a test current of 5 mA. The device has a maximum dynamic resistance of 90 Ω and a reverse leakage current of 3 μA at 3 V. It is AEC-Q101 qualified for automotive applications, offering high ESD protection (>8 kV HBM). Power dissipation is rated at 500 mW on lead-mounted conditions and 300 mW on FR-4 boards, with an operating temperature range of -55 °C to +150 °C.

Feature Summary

• AEC-Q101 qualified for automotive reliability standards
• High electrostatic discharge (ESD) capability exceeding 8 kV via human body model
• RoHS-compliant construction utilizing silicon planar technology

Applications

• Voltage reference circuits in automotive electronics
• Clamping and protection stages for sensitive input lines
• Biasing networks requiring stable low-voltage regulation

Procurement Notes

Verify that the ordering suffix matches HE3_A for AEC-Q101 qualification and HE3 for commercial grade. Confirm the tape-and-reel packaging specification corresponds to the required quantity per reel. Ensure the component meets specific environmental compliance requirements for the target assembly process.

Selection Notes

Select this part when a 4.3 V Zener voltage with tight tolerance is required in a compact SOT-23 footprint. Consider the thermal resistance values if power dissipation exceeds standard levels. Verify that the dynamic impedance characteristics align with the noise and stability requirements of the specific circuit design.

Part Context

This component belongs to the DZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series provides a wide range of standardized voltages based on the E24 standard. The DZ23C4V3 variant specifically targets applications needing precise 4.3 V regulation within a miniature surface-mount form factor suitable for high-density PCB layouts.

Replacement Considerations

Direct substitutes include other DZ23C4V3 variants such as DZ23C4V3-E3-18 or DZ23C4V3-G3-18, noting differences in qualification status. Cross-brand replacements must match the 4.3 V nominal voltage, SOT-23 package dimensions, and equivalent electrical parameters like dynamic resistance and leakage current.