DZ23C18-HE3_A-08

Overview

The DZ23C18-HE3_A-08 is a silicon planar Zener diode from the Vishay DZ23 series, housed in an SOT-23 surface-mount package. It provides a nominal Zener voltage of 18 V with a tolerance of ±5 %. The device operates within a junction temperature range of -55 °C to +150 °C and dissipates up to 500 mW on a lead or 300 mW on an FR-4 board. It is AEC-Q101 qualified for automotive applications and offers high ESD protection exceeding 8 kV via the human body model.

Feature Summary

• AEC-Q101 qualified for automotive reliability standards
• High electrostatic discharge (ESD) robustness exceeding 8 kV HBM
• RoHS-compliant construction with halogen-free molding compound

Applications

• Voltage reference circuits in automotive electronics
• Clamping and protection stages for sensitive input lines
• Biasing networks requiring stable low-voltage regulation

Procurement Notes

Verify that the specific ordering suffix matches the required qualification level. The HE3_A suffix indicates AEC-Q101 automotive qualification, whereas the E3 suffix denotes commercial grade. Confirm the tape and reel packaging format aligns with automated assembly requirements before finalizing procurement orders.

Selection Notes

Select this component when a precise 18 V reference is needed in space-constrained designs. Ensure the thermal management strategy accommodates the specified power dissipation limits at maximum ambient temperatures. Verify that the dynamic resistance and leakage current specifications meet the circuit's accuracy requirements under expected operating conditions.

Part Context

This part belongs to the DZ23 series of small signal Zener diodes manufactured by Vishay Semiconductors. The series covers a wide voltage range from 2.2 V to 75 V using standardized E24 grading. All variants share the compact SOT-23 footprint, enabling consistent design practices across different voltage reference needs in portable and industrial equipment.

Replacement Considerations

Direct replacements must match the 18 V nominal voltage, ±5 % tolerance, and SOT-23 package. Verify that any substitute component meets the same AEC-Q101 qualification if automotive reliability is required. Check thermal resistance and power dissipation ratings to ensure equivalent performance under load.