AZ23B43-E3-18

Overview

The AZ23B43-E3-18 is a dual common anode silicon planar Zener diode array from the AZ23 series, manufactured by Vishay Semiconductors. It provides two independent voltage regulation channels within a single SOT-23 package. The nominal Zener voltage is 43 V with a tight tolerance of ±2%. Electrical characteristics include a maximum reverse leakage current of 50 nA at 32 V and a dynamic resistance of 97 Ω at a test current of 2 mA. The device supports a power dissipation of up to 500 mW on leads and 300 mW on FR-4 boards, operating reliably across a temperature range of -55 °C to +150 °C.

Feature Summary

• Dual common anode configuration for space-efficient circuit design
• High precision ±2% Zener voltage grading according to E24 standard
• Robust ESD protection exceeding 8 kV human body model rating
• RoHS-compliant commercial grade construction

Applications

• Precision voltage reference circuits requiring dual rails
• Over-voltage protection stages in signal conditioning paths
• Clamping applications in high-density surface mount assemblies

Procurement Notes

Verify that the specific ordering code matches the required tolerance and packaging format. Confirm RoHS compliance status and ensure the component meets the intended environmental operating limits. Cross-reference datasheet electrical parameters against actual application requirements before finalizing procurement specifications.

Selection Notes

Select this variant when precise dual-channel regulation is necessary within a compact footprint. The ±2% tolerance ensures tighter voltage control compared to standard ±5% devices. Evaluate thermal management requirements based on the 300 mW dissipation limit on PCBs versus the higher lead-mounted capability.

Part Context

This component belongs to the AZ23 series of small signal Zener diodes. The 'B' designation indicates the ±2% tolerance grade, while 'E3' signifies RoHS compliance. The '-18' suffix denotes the standard 10,000-unit reel packaging format used for automated surface mount assembly processes.

Replacement Considerations

AZ23B43-E3-08 offers identical electrical performance but utilizes 3,000-unit tape-and-reel packaging. AZ23B43-G3-18 provides the same technical specifications with alternative manufacturing sourcing.