1N5222B-T

Single Zener Diodes Overview

The Diodes Incorporated 1N5222B-T is a discontinued 500mW epitaxial Zener diode with a nominal voltage of 2.5V and ±5% tolerance. It operates in the DO-35 glass axial package, featuring a maximum reverse current of 100µA at 1V and a maximum Zener impedance of 30Ω at the test current of 20mA. The device supports an operating temperature range from -65°C to +175°C and includes a lead-free finish compliant with RoHS directives.

Single Zener Diodes Feature Summary

• Epitaxial planar die construction for high stability
• Hermetic glass case design
• Lead-free finish compliant with EU RoHS directives

Single Zener Diodes Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Single Zener Diodes Procurement Notes

This component is officially marked as obsolete and discontinued by the manufacturer. Procurement must rely on secondary market distributors or surplus suppliers. Verify the authenticity of the source channel and confirm the manufacturing date code to ensure storage conditions have not degraded the solderability or internal junction integrity before integration into production.

Single Zener Diodes Selection Notes

Designers should transition to the MMSZ52xxB surface mount series as the designated replacement family. Evaluate the thermal management requirements for the new package type and verify that the physical footprint changes are compatible with existing PCB layouts. Ensure the selected alternative maintains the required voltage tolerance and power dissipation characteristics for the specific application environment.

Single Zener Diodes Part Context

The 1N5222B-T belongs to the broader 1N5221B through 1N5267B series of 500mW Zener diodes manufactured by Diodes Incorporated. This series provides a wide selection of standard voltage ratings ranging from 2.4V to 75V. The product line utilizes a consistent DO-35 glass axial package format, historically favored for through-hole automated assembly processes requiring hermetic sealing capabilities.

Single Zener Diodes Replacement Considerations

Diodes Incorporated explicitly recommends using the MMSZ52xxB series as the direct substitute for this discontinued part number.