AZ23B12-G3-18

Overview

The AZ23B12-G3-18 is a silicon planar Zener diode from Vishay's AZ23-G series, housed in an SOT-23 package. It features a nominal Zener voltage of 12 V with a tight tolerance of ±2%, indicated by the 'B' suffix. The device operates within a junction temperature range of -55 °C to +150 °C and dissipates up to 500 mW. Electrical characteristics include a reverse leakage current of 0.1 μA at 9 V and dynamic resistance values of 20 Ω at IZT1 (5 mA) and 90 Ω at IZT2 (1 mA). The component is supplied in 13-inch tape reels containing 10,000 units per reel.

Feature Summary

• Silicon planar construction for reliable voltage regulation
• Graded Zener voltages according to international E24 standard
• Green commercial grade material composition compliant with environmental standards

Applications

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

Procurement Notes

Verify the specific ordering code AZ23B12-G3-18 against official Vishay documentation to confirm the 2% tolerance and 10,000-unit reel configuration. Ensure compatibility with SOT-23 footprint requirements and thermal management constraints specified in the datasheet before finalizing supply agreements.

Selection Notes

Select this component when a 12 V reference with ±2% accuracy is required in a compact SOT-23 form factor. Consider the thermal resistance of 250 K/W and power dissipation limits for high-temperature environments. Verify that the test current conditions align with the target circuit design parameters.

Part Context

This part belongs to the AZ23-G series of small signal Zener diodes manufactured by Vishay General Semiconductor. The series offers a wide range of Zener voltages from 2.2 V to 75 V. The AZ23B12 variant specifically targets applications needing tighter voltage tolerances compared to the standard ±5% 'C' grade devices.

Replacement Considerations

Direct substitutes within the same series include AZ23C12-G3-18 for ±5% tolerance or AZ23B12-G3-08 for different packaging quantities. Cross-brand replacements require matching Zener voltage, tolerance, package type, and thermal characteristics.