AZ23B3V3-E3-18

Overview

The AZ23B3V3-E3-18 is a dual common-anode Zener diode array manufactured by Vishay General Semiconductor - Diodes Division. It features a nominal Zener voltage of 3.3 V with a tight tolerance of ±2%, indicated by the 'B' in the part number. The device operates within a test current range of 1 to 5 mA and exhibits a maximum reverse leakage current of 5 µA at 2.5 V. Dynamic resistance is specified at 95 Ω, while the temperature coefficient ranges from -8 to -3 x 10⁻⁴/°C. Rated for surface mount installation in an SOT-23 package, it supports an operating temperature range of -55°C to +150°C and complies with RoHS standards.

Feature Summary

• Dual common-anode configuration providing two independent Zener references in a single compact package
• High precision voltage grading with ±2% tolerance option available via the 'B' designation
• Robust ESD protection capability exceeding 8 kV according to the human body model standard

Applications

• Precision voltage reference circuits requiring dual stable potentials
• Over-voltage protection stages in sensitive signal processing paths
• Clamping applications for transient suppression in communication interfaces

Procurement Notes

Verify that the ordering code suffix matches the required tape and reel quantity. The '-18' suffix indicates a standard 10,000-unit reel on a 13-inch carrier. Confirm compliance requirements such as RoHS status and ensure the specific tolerance grade aligns with circuit design constraints before finalizing procurement orders.

Selection Notes

Select this component when a dual Zener solution with high voltage accuracy is necessary. The ±2% tolerance variant is suitable for precision analog designs where tighter voltage margins are critical compared to standard ±5% devices. Ensure the thermal management strategy accounts for the 300 mW dissipation limit on FR-4 substrates during continuous operation.

Part Context

This device belongs to the AZ23 series of small signal silicon planar Zener diodes. The series offers a wide voltage range from 2.2 V to 75 V, graded according to the international E24 standard. The specific part utilizes the SOT-23 surface mount package, which provides a low-profile footprint suitable for automated assembly processes in modern electronic manufacturing.

Replacement Considerations

AZ23B3V3-E3-08

FAQ

What does the 'B' character signify in the AZ23B3V3-E3-18 ordering code?

The 'B' character indicates that the Zener voltage tolerance is ±2%. Replacing 'B' with 'C' would result in a standard ±5% tolerance.

Is the AZ23B3V3-E3-18 qualified for automotive applications?

No, the base P/N-E3 version is commercial grade. Automotive qualification (AEC-Q101) is only available for parts with the HE3_A suffix.

What is the maximum power dissipation rating on an FR-4 board?

The maximum power dissipation is rated at 300 mW when mounted on an FR-4 board with the recommended soldering footprint.