AZ23C2V4-E3-18

Overview

The Vishay AZ23C2V4-E3-18 is a silicon planar Zener diode array housed in an SOT-23 package. It features a common anode configuration with two independent diodes sharing a single terminal. The nominal Zener voltage is 2.4 V, maintained within a ±5% tolerance band (2.28 V to 2.52 V) at a test current of 5 mA. Maximum reverse leakage current is specified at 1 µA under 1 V reverse bias. Dynamic resistance is limited to 100 Ω at the test current. The device supports a maximum power dissipation of 300 mW on standard FR-4 boards and operates across a temperature range of -55 °C to +150 °C.

Feature Summary

• Dual-diode structure integrated into a single compact surface-mount component
• Common anode topology simplifies circuit layout for dual reference applications
• Silicon planar construction ensures stable electrical characteristics

Applications

• Dual-channel voltage reference circuits
• Over-voltage protection for low-voltage signal lines
• Clamping networks in portable electronic devices

Procurement Notes

Verify that the ordering suffix matches the required tape width and reel size. Confirm RoHS compliance status aligns with project requirements. Ensure the specific batch corresponds to the documented thermal resistance values. Cross-reference the marking code D78 against incoming inspection standards to validate authenticity and traceability.

Selection Notes

Select this variant when a precise 2.4 V reference is required in a space-constrained design. The common anode arrangement reduces board area compared to discrete components. Verify that the operating current remains near the 5 mA test point to maintain accuracy. Consider the dynamic resistance specifications when designing for high-speed transient response.

Part Context

This component belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series utilizes standardized E24 voltage grading to provide consistent performance across various voltage ratings. The E3 suffix indicates lead-free termination compliant with international environmental directives.

Replacement Considerations

Direct substitutes include other AZ23 series variants with identical pinouts but different voltage ratings. Alternative manufacturers may offer functionally equivalent SOT-23 dual Zener arrays, though thermal and electrical parameters must be validated against the original datasheet.