1N4728ATR_S00Z

Overview

The onsemi 1N4728ATR_S00Z is a single silicon Zener diode rated for 1 W power dissipation. It features a nominal Zener voltage of 3.9 V with a 5% tolerance. The device operates within a temperature range of -65 °C to +200 °C. Key electrical parameters include a maximum reverse leakage current of 50 uA and a Zener impedance of 9 Ohms at a test current of 64 mA. It utilizes a DO-41 through-hole package.

Feature Summary

• Provides stable voltage regulation in the low-voltage range via Zener breakdown mechanism.
• Constructed with hermetically sealed glass passivation for environmental protection.
• Designed for axial lead mounting in through-hole applications.

Applications

• Voltage reference circuits requiring low-voltage stability
• Overvoltage protection for sensitive electronic components
• Clamping applications in signal processing paths

Procurement Notes

Verify component authenticity against official onsemi documentation due to discontinuation status. Confirm that the DO-41 package dimensions and pinout match design requirements. Ensure thermal management strategies account for the 1 W power rating under worst-case operating conditions. Validate compliance with specific project standards regarding material composition and reliability screening.

Selection Notes

Select this component when a precise 3.9 V reference is needed with moderate accuracy. Consider the 5% tolerance impact on circuit performance. Evaluate the high maximum operating temperature capability for harsh environments. Compare alternative packages if space constraints exist, noting the DO-41 form factor limitations.

Part Context

This part belongs to the standard 1N47xx series of 1 W Zener diodes manufactured by onsemi. It shares the DO-41 axial glass package common across many legacy voltage regulator diodes. The suffix indicates specific packaging or lot tracking details defined by the manufacturer.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source data. Consult onsemi technical support for direct replacements or equivalent specifications from other manufacturers.