DZ23C18-G3-18

Overview

The DZ23C18-G3-18 is a silicon planar Zener diode from the Vishay DZ23-G series, housed in an SOT-23 surface-mount package. It provides a nominal Zener voltage of 18 V with a standard tolerance of ±5 %. The device operates at a test current of 5 mA and features a dynamic resistance of 45 Ω maximum at this current. Electrical characteristics include a reverse leakage current of 0.05 μA maximum at 14 V and a temperature coefficient ranging from 8 to 9.5 × 10⁻⁴/°C. Power dissipation is rated at 300 mW on an FR-4 board, supporting an operating temperature range from -55 °C to +150 °C.

Feature Summary

• Silicon planar construction for reliable small-signal regulation
• Graded Zener voltages according to the international E24 standard
• ESD protection capability exceeding 8 kV via human body model

Applications

• Voltage reference circuits requiring stable low-power regulation
• Protection against overvoltage transients in signal lines
• Biasing networks for small-signal transistor stages

Procurement Notes

Verify the specific ordering code suffix to confirm packaging format. The '-18' designation indicates units are supplied in reels of 10,000 on 13 mm tape. Confirm RoHS compliance status and material categorization details directly through official Vishay documentation channels before finalizing procurement orders.

Selection Notes

Select this component when a 18 V Zener reference is required within a compact SOT-23 footprint. Ensure the application current remains near the specified 5 mA test point to maintain accuracy within the ±5 % tolerance band. Verify that the thermal environment allows for safe operation within the 300 mW dissipation limit on standard PCB layouts.

Part Context

This part belongs to the DZ23-G series of small-signal Zener diodes manufactured by Vishay Semiconductors. The series covers a wide voltage range from 2.2 V to 75 V, all utilizing the same SOT-23 package form factor. The 'G3' suffix denotes green commercial grade materials compliant with environmental directives.

Replacement Considerations

Cross-reference with other manufacturers offering SOT-23 packaged Zener diodes with 18 V nominal voltage and similar power ratings. Verify pinout compatibility and ensure dynamic resistance and leakage current specifications meet or exceed the original requirements.