BZD27C18PWH

Single Zener Diodes Overview

The BZD27C18PWH is a single silicon Zener diode manufactured by Taiwan Semiconductor, designed for surface-mount applications in the SOD-123W-2 package. It features a nominal Zener voltage of 18 V with a tolerance of ±5% and a maximum power dissipation of 1 W. The device operates within a temperature range of -55 °C to +175 °C and holds AEC-Q101 qualification for automotive reliability. Key electrical characteristics include a Zener impedance of 15 Ohms at a test current of 25 mA, a reverse leakage current of 1 µA, and a forward voltage of 1 V at 200 mA.

Single Zener Diodes Feature Summary

• Low profile surface-mount design suitable for space-constrained PCB layouts
• Automotive-grade reliability certified under AEC-Q101 standards
• High thermal stability supporting operation up to 175 °C junction temperature
• Low leakage current ensuring minimal power loss in standby states

Single Zener Diodes Applications

• Voltage regulation in automotive electronic control units
• Transient voltage suppression in high-reliability circuits
• Reference voltage generation in precision measurement systems
• Over-voltage protection for sensitive semiconductor components

Single Zener Diodes Procurement Notes

Verify the specific suffix 'PWH' against the manufacturer's official datasheet to confirm package dimensions and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements for your target market. Confirm that the AEC-Q101 qualification aligns with your system's automotive grade requirements before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 18 V reference is required in an SOD-123W-2 footprint. The 1 W power rating supports moderate current handling compared to lower-power variants. The wide operating temperature range makes it suitable for harsh environments where standard commercial parts may fail. Verify that the 15 Ohm impedance meets the noise sensitivity requirements of the application.

Single Zener Diodes Part Context

This part belongs to the BZD27C series of low-profile Zener diodes from Taiwan Semiconductor. The series offers various voltage options within the same physical package to simplify inventory management. The SOD-123W-2 form factor provides improved thermal performance over standard SOD-123 packages while maintaining a small board area.

Single Zener Diodes Replacement Considerations

Cross-reference with Vishay BZD27C18P-M3-08 for similar voltage and package compatibility, noting differences in power ratings and impedance. Verify pinout alignment and thermal characteristics before substituting.