AZ23C4V7-E3-18

Overview

The AZ23C4V7-E3-18 is a dual common anode silicon planar Zener diode array from Vishay, housed in an SOT-23 package. It features a nominal Zener voltage of 4.7 V with a ±5% tolerance and a test current of 5 mA. The device has a maximum reverse leakage current of 3 µA at 4.7 V and a dynamic resistance of 78 Ω at the test current. Rated for power dissipation up to 500 mW (300 mW on FR-4), it operates within a temperature range of -55 °C to +150 °C.

Feature Summary

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

Applications

• Voltage reference circuits requiring dual channels
• Clamping and protection applications in consumer electronics
• Signal conditioning modules in industrial control systems

Procurement Notes

Verify the specific ordering code suffix against project requirements. The '-E3' designation indicates RoHS compliance for commercial grade devices. Confirm that the '-18' suffix aligns with the required tape and reel quantity of 10,000 units per reel. Ensure compatibility with standard surface mount assembly processes.

Selection Notes

Select this component when a dual Zener array with a common anode is needed in a compact SOT-23 footprint. The 4.7 V nominal voltage suits low-voltage regulation tasks. Consider the 78 Ω dynamic resistance for impedance matching. Verify thermal management needs if operating near the 300 mW limit on PCB substrates.

Part Context

This part belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay General Semiconductor. The series offers various voltage options graded to the E24 standard. The AZ23C4V7 variant specifically provides the 4.7 V breakdown voltage necessary for precise voltage referencing or clamping in low-power semiconductor applications.

Replacement Considerations

Direct substitutes include other AZ23C4V7 variants such as AZ23C4V7-G3-18 or AZ23C4V7-HE3-18, provided the tolerance and qualification levels match the design requirements. Cross-brand replacements must be evaluated for pinout compatibility and electrical parameter alignment.