AZ23C33

Overview

The AZ23C33 is a dual surface-mount 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 33 V, with a tolerance of ±5%, ranging from 31 V to 35 V at a test current (Izt) of 5 mA. Maximum power dissipation is 300 mW, and the maximum junction temperature is 150 °C. Electrical characteristics include a maximum Zener impedance (Zzt) of 80 Ω and a leakage current (Ir) of 1 µA at 25 V.

Feature Summary

• Dual Zener diodes integrated into a single compact SOT-23 package for space-efficient designs
• Common anode configuration simplifies circuit layout and component placement
• Halogen-free construction compliant with IEC 61249-2-21 standards
• Moisture sensitivity level 1 per J-STD-020 for reliable automated assembly

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 variations such as RF or RFG indicate different packaging formats like 7-inch reels. Confirm RoHS compliance and halogen-free status if required by project specifications. Ensure the selected part number matches the exact voltage code KDR for the 33 V variant to avoid functional mismatches during integration.

Selection Notes

Select this component for applications requiring dual voltage regulation within a limited footprint. The common anode topology allows for efficient shared ground connections. Verify that the operating current remains within the specified 5 mA test condition limits to maintain accurate voltage regulation. Consider thermal resistance parameters for high-density PCB layouts to ensure junction temperatures remain below the 150 °C maximum rating.

Part Context

This device belongs to the AZ23C series, which offers a wide range of Zener voltages from 2.7 V to 51 V. All members of this family share identical mechanical dimensions and electrical testing conditions, differing primarily in their nominal breakdown voltage and corresponding marking codes. The series is designed for general-purpose surface-mount applications.

Replacement Considerations

Cross-referencing requires matching the SOT-23 package, 300 mW power rating, and 33 V nominal voltage. Verify that alternative components support the same common anode configuration and meet the ±5% tolerance requirement to ensure circuit compatibility without redesign.