AZ23C18HE3-TP

Overview

The AZ23C18HE3-TP is a dual common anode Zener diode manufactured by Micro Commercial Components (MCC). It features a nominal Zener voltage of 18 V with a tolerance of 5%. The device operates in the SOT-23-3 surface-mount package, measuring 3.04 mm in length, 1.4 mm in width, and 1.12 mm in height. It dissipates up to 300 mW of power at a test current of 5 mA. Key electrical characteristics include a maximum reverse leakage current of 100 nA, a Zener impedance of 45 Ohms, and a voltage temperature coefficient of 16 mV/C. The component supports an operating temperature range from -55 C to +150 C.

Feature Summary

• Dual common anode configuration integrates two Zener diodes into a single compact package for space-constrained designs.
• High thermal stability maintained across an extended operating temperature range from -55 C to +150 C.
• Low leakage current specification ensures minimal power loss and improved circuit efficiency in standby states.

Applications

• Voltage reference circuits requiring stable dual polarity or split-rail references.
• Over-voltage protection stages in sensitive electronic instrumentation.
• Signal conditioning modules utilizing precise clamping thresholds.

Procurement Notes

Verify the specific HE3 suffix against the manufacturer's latest datasheet to confirm lead-free compliance and RoHS status. Ensure the SOT-23-3 footprint matches the PCB layout requirements. Confirm availability through authorized distributors as supply levels may fluctuate. Cross-reference the part number with official MCC documentation to validate manufacturing origin and quality standards before integration.

Selection Notes

Select this component when a dual Zener solution is required in a small SMD form factor. The 18 V rating suits applications needing moderate voltage clamping. Consider the 45 Ohm impedance for dynamic load variations. Verify that the 300 mW power dissipation meets the thermal design constraints. Compare against single Zener alternatives if only one channel is needed to optimize board space.

Part Context

This part belongs to the AZ23C series of dual Zener diodes from Micro Commercial Components. The series offers various voltage options within the same SOT-23-3 package family. The HE3 designation typically indicates environmental compliance features such as halogen-free materials. This series is designed for high-volume automated assembly processes in consumer and industrial electronics.

Replacement Considerations

Direct substitutes include other AZ23C18 variants from different manufacturers offering identical pinouts and electrical specs. Verify package dimensions and thermal characteristics when considering cross-brand replacements. Ensure the replacement maintains the 5% voltage tolerance and 300 mW power rating.