CD0603-Z18

Overview

The CD0603-Z18 is a surface mount Zener diode from the Bourns CD0603/1005-Z series, housed in a compact 0603 (1608 metric) molded plastic package. It provides a nominal Zener voltage of 18 V with a tolerance range of 17.10 V to 18.90 V. The device features gold-plated terminals and operates within a temperature range of -55 °C to +125 °C. Key electrical parameters include a maximum Zener impedance of 50 Ohms at 5 mA test current and a reverse leakage current of 0.1 mA. Power dissipation is rated at 0.5 W at 25 °C ambient temperature.

Feature Summary

• Compact 0603 surface mount footprint designed for PCB real estate savings
• Gold-plated terminals compatible with standard pick-and-place equipment
• Flat configuration minimizes roll-away during automated assembly

Applications

• DC-DC converters
• Portable electronics
• Industrial controllers
• Desktop PCs and notebooks

Procurement Notes

Verify component authenticity by checking markings against datasheet specifications. Confirm RoHS compliance status as this series is not recommended for new designs. Ensure compatibility with existing JEDEC standards and soldering processes. Review specific application requirements against actual device performance variations over time before finalizing procurement decisions.

Selection Notes

Select this component when space constraints require a small form factor Zener diode. The 0603 package offers significant size reduction compared to competitive parts. Verify that the 18 V nominal voltage aligns with circuit protection or reference needs. Consider the operating temperature range and power dissipation limits for the intended thermal environment.

Part Context

This part belongs to the Bourns CD0603/1005-Z Surface Mount Zener Diode Series. The series includes various voltage options ranging from 2.0 V to 39 V in both 0603 and 1005 package sizes. These devices are engineered for portable communications, computing, and video equipment markets requiring miniaturized electronic components.

Replacement Considerations

Review specifications of cross-referenced products carefully. Bourns recommends ordering samples and conducting thorough testing in specific applications before replacing existing components. Competitive equivalents may differ in quality, approvals, or features.