AZ23C3V9

Overview

The AZ23C3V9 is a dual SMD Zener diode manufactured by Taiwan Semiconductor, housed in an SOT-23 package. It features a common anode configuration with two independent Zener elements. The nominal Zener voltage is 3.9 V, with a tolerance of ±5%. Power dissipation is rated at 300 mW, and the junction temperature range spans from -55 °C to +150 °C. Electrical characteristics include a test current (Izt) of 5 mA, a maximum Zener impedance (Zzt) of 95 Ω, and a leakage current (Ir) of 0.1 µA at 1 V.

Feature Summary

• Dual Zener diodes integrated into a single compact SOT-23 surface-mount package for space-efficient designs.
• Common anode configuration allows for simplified circuit topology and automated assembly processes.
• Halogen-free construction compliant with IEC 61249-2-21 standards for environmental safety.

Applications

• Low voltage stabilizers or voltage references
• Adapters
• Lighting applications
• On-board DC/DC converters

Procurement Notes

Verify the specific ordering suffix when purchasing, as it determines the packing method such as reel quantities. Confirm RoHS compliance and halogen-free status if required by project specifications. Check the manufacturer's latest documentation for any updates regarding moisture sensitivity levels or lead finish variations before finalizing procurement orders.

Selection Notes

Select this component for circuits requiring precise dual voltage regulation within a small footprint. Ensure the operating power dissipation remains below 300 mW to maintain reliability. Verify that the required Zener voltage falls within the standard ±5% tolerance band. Consider thermal resistance characteristics when designing PCB layouts for adequate heat dissipation.

Part Context

This device belongs to the AZ23C series, which offers a wide selection of Zener voltages ranging from 2.7 V to 51 V. All members of this series share identical mechanical dimensions and packaging standards, facilitating design flexibility across different voltage requirements while maintaining consistent board layout constraints.

Replacement Considerations

Cross-reference with other manufacturers offering dual common anode Zener diodes in SOT-23 packages. Verify that substitute components match the 3.9 V nominal voltage, 300 mW power rating, and electrical parameters such as impedance and leakage current to ensure functional compatibility.