1N5237B-T

Single Zener Diodes Overview

The Diodes Incorporated 1N5237B-T is a discontinued 500mW epitaxial Zener diode housed in a glass DO-35 package. It features a nominal Zener voltage of 8.2V with a tolerance of ±5%, tested at 20mA. The device exhibits a maximum Zener impedance of 8Ω at the test current and 500Ω at 0.25mA. It operates within a temperature range of -65°C to +175°C, with a thermal resistance of 300°C/W. The component offers high stability and hermetic sealing, with lead-free finish compliant with RoHS directives.

Single Zener Diodes Feature Summary

• Hermetic glass encapsulation for environmental protection
• High stability epitaxial Zener construction
• Lead-free finish compliant with RoHS standards

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Single Zener Diodes Procurement Notes

This part number is officially obsolete and discontinued by Diodes Incorporated. Verification of availability must rely on secondary market sources or distributor surplus listings rather than direct manufacturer allocation. Buyers should confirm the authenticity and storage history of existing stock, as long-term storage may affect solderability and performance characteristics despite the hermetic seal.

Single Zener Diodes Selection Notes

Designers requiring this specific voltage rating must transition to the MMSZ52xxB series, which serves as the designated replacement family for the discontinued 1N5221B through 1N5267B lines. Selection should account for potential differences in packaging format, as the original DO-35 axial style differs from the surface mount equivalents available in the successor series.

Single Zener Diodes Part Context

The 1N5237B-T belongs to the broader 1N5221B-1N5267B family of 500mW Zener diodes produced by Diodes Incorporated. This series was widely used for precision voltage regulation tasks before being phased out. The '-T' suffix specifically denotes tape and reel packaging for automated assembly processes.

Single Zener Diodes Replacement Considerations

Public documentation confirms the MMSZ52xxB series as the official substitute for the 1N5221B-1N5267B line. Engineers should verify pinout compatibility and thermal management requirements when migrating from the axial DO-35 package to the surface mount MMSZ variants.