ACZRA4739-HF

Single Zener Diodes Overview

The ACZRA4739-HF is an automotive-grade Zener diode manufactured by Comchip Technology. It features a nominal Zener voltage of 27 V and a power dissipation rating of 1 W. The device is housed in the DO-214AC (SMA) surface-mount package. It holds AEC-Q101 qualification for automotive reliability standards. Key electrical parameters include a maximum reverse leakage current of 5 µA, a Zener impedance of 80 Ohms, and a test current of 10.5 mA. The component operates within a junction temperature range of -55°C to +150°C.

Single Zener Diodes Feature Summary

• Automotive-grade reliability certified under AEC-Q101 standards
• High power dissipation capability of 1 Watt
• Low reverse leakage current for efficient regulation
• Robust thermal performance across extended industrial temperatures

Single Zener Diodes Applications

• Automotive circuit voltage regulation
• Overvoltage protection in vehicle electronics
• Reference voltage generation in automotive modules

Single Zener Diodes Procurement Notes

Verify the specific datasheet version for the ACZRA4739-HF to confirm exact tolerance grades and testing conditions. Ensure compatibility with AEC-Q101 requirements for your target application. Cross-reference pinout and thermal characteristics against your PCB layout specifications before finalizing procurement decisions.

Single Zener Diodes Selection Notes

Select this component when high-power Zener regulation is required in space-constrained automotive designs. The DO-214AC package offers robust soldering reliability. Consider the 1 W dissipation rating for thermal management needs. Verify that the 27 V breakdown voltage aligns precisely with system protection thresholds.

Single Zener Diodes Part Context

This part belongs to Comchip Technology's ACZRA series of automotive Zener diodes. The series is designed specifically for harsh automotive environments requiring high reliability. The 'HF' suffix indicates halogen-free compliance. These components serve as critical protection elements in modern vehicle electronic control units and power distribution systems.

Single Zener Diodes Replacement Considerations

Direct substitutes must match the 27 V Zener voltage, 1 W power rating, DO-214AC package, and AEC-Q101 qualification. Verify equivalent leakage current and impedance specs. Generic SMA Zener diodes without automotive certification are not suitable replacements for this specific part number.