1N5238

Single Zener Diodes Overview

The SMC Diode Solutions 1N5238 is a silicon Zener diode with a nominal voltage of 8.7V and a maximum power dissipation of 0.5W. It utilizes a DO-35 axial leaded package, classified as JEDEC-95 code DO-204AH. The device features unidirectional polarity and isolated case connection. Standard tolerance variants include ±5% (suffix B) and ±10% (suffix A). Operating temperature ranges extend from -65°C to +175°C junction temperature.

Single Zener Diodes Feature Summary

• Hermetically sealed glass construction for environmental protection
• Metallurgically bonded double slug type design
• DO-35 package offering smaller footprint than conventional DO-204AA

Single Zener Diodes Applications

• Voltage regulation in power supply circuits
• Overvoltage protection for sensitive components
• Reference voltage generation in analog circuits

Single Zener Diodes Procurement Notes

Verify the specific suffix letter (A, B, or none) to confirm tolerance accuracy, as this defines the electrical precision. Confirm package style matches DO-35 requirements. Check RoHS compliance status if restricted substances are prohibited in the assembly process. Ensure the manufacturer designation aligns with SMC Diode Solutions specifications rather than generic equivalents.

Single Zener Diodes Selection Notes

Select based on required voltage tolerance; use suffix B for tighter 5% control or standard versions for 10%. Verify thermal management capabilities given the 0.5W dissipation limit. Ensure the axial lead form factor fits the PCB layout constraints. Compare knee impedance characteristics if precise regulation at low currents is critical for the application.

Single Zener Diodes Part Context

This component belongs to the 1N5221B through 1N5281B series of 0.5-watt Zener voltage regulators. The series provides a wide selection of voltages from 2.4V to 200V. These devices are widely used as standard reference elements in discrete semiconductor applications requiring stable voltage clamping.

Single Zener Diodes Replacement Considerations

• 1N5238B
• 1N5238/TR