1N5228B

Single Zener Diodes Overview

The Fairchild Semiconductor 1N5228B is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 3.9 V with a tolerance of ±5%. The device supports a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a maximum reverse leakage current of 1 µA, a Zener impedance of 23 Ohms, and a test current of 20 mA. The component utilizes a DO-7 (DO-35) through-hole axial glass package.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at a nominal 3.9 V level
• Utilizes a glass axial-leaded DO-35 package for through-hole mounting
• Supports high junction temperatures up to 200°C
• Features low reverse leakage current for efficient standby operation

Single Zener Diodes Applications

• General purpose voltage regulation circuits
• Reference voltage sources in analog systems
• Overvoltage protection stages
• Clamping applications in signal processing

Single Zener Diodes Procurement Notes

Verify the specific manufacturer source, as the 1N5228B designation is used by multiple producers including Microchip and Vishay. Confirm that the supplier is indeed Fairchild Semiconductor or its successor entity. Check RoHS compliance status, as older Fairchild stock may differ from current production runs. Ensure the package matches the required DO-7/DO-35 form factor for your PCB layout.

Single Zener Diodes Selection Notes

Select this component when a standard 3.9 V reference is required in a through-hole design. The 500 mW rating suits moderate current applications. Consider the 23 Ohm impedance for dynamic load requirements. Verify thermal management capabilities given the 200°C maximum junction temperature limit. Compare against surface-mount alternatives like MMSZ5228B if space constraints exist.

Single Zener Diodes Part Context

This part belongs to the widely recognized 1N52xxB series of half-watt Zener diodes. The 'B' suffix typically denotes a 5% voltage tolerance. The 1N5228B specifically targets the 3.9 V segment of this family. It serves as a fundamental discrete semiconductor component for basic electronic circuitry requiring reliable voltage clamping.

Single Zener Diodes Replacement Considerations

Equivalent parts include the Microchip 1N5228B and Vishay 1N5228B-TR. Surface-mount replacements such as the Fairchild MMSZ5228B offer identical electrical performance in an SOD-123 package. Verify pinout compatibility and thermal derating curves when substituting.