AZ23B56-E3-18

Overview

The AZ23B56-E3-18 is a silicon planar Zener diode from Vishay, housed in an SOT-23 package. It features a nominal Zener voltage of 56 V with a ±2% tolerance, indicated by the 'B' suffix. The device operates at a test current of 2 mA and is supplied in taped reels of 10,000 units on 13 mm carriers. Key electrical parameters include a maximum reverse leakage current of 50 μA at 42 V and dynamic resistances of 135 Ω (at IZT1) and 425 Ω (at IZT2). It supports a power dissipation of 500 mW and functions within a junction temperature range of -55 °C to +150 °C.

Feature Summary

• Silicon planar construction for reliable voltage regulation
• Graded Zener voltages according to international E24 standard
• ESD protection capability exceeding 8 kV via human body model
• RoHS-compliant commercial grade material categorization

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in low-power electronic systems
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific ordering code against the manufacturer's official documentation to ensure correct tolerance and packaging specifications. Confirm that the component meets all required environmental and safety standards for the intended application before finalizing procurement decisions.

Selection Notes

Select this component when a precise 56 V Zener voltage with tight ±2% tolerance is required in a compact SOT-23 footprint. Ensure the operating current aligns with the 2 mA test condition for optimal performance and verify thermal management capabilities for the expected power dissipation levels.

Part Context

This part belongs to the AZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series offers a wide range of standardized voltage values in a surface-mount SOT-23 package, designed for general-purpose voltage regulation and protection tasks in consumer and industrial electronics.

Replacement Considerations

Direct substitutes must match the 56 V nominal voltage, ±2% tolerance, SOT-23 package, and similar electrical characteristics such as dynamic resistance and leakage current. Verify compatibility with existing PCB footprints and thermal requirements.

FAQ

What does the 'B' suffix indicate in the part number AZ23B56-E3-18?

The 'B' suffix indicates a Zener voltage tolerance of ±2%, compared to the 'C' suffix which denotes ±5% tolerance.

What is the maximum reverse leakage current for this device?

The maximum reverse leakage current is 50 μA, measured at a reverse voltage of 42 V.

In what type of carrier tape is this component supplied?

It is supplied in 8 mm tape on 13 inch reels, with a quantity of 10,000 units per reel.