1N5238A

Single Zener Diodes Overview

The Microchip Technology 1N5238A is a 0.5 W glass axial-lead Zener diode in the DO-35 (DO-204AH) package. It provides a nominal Zener voltage of 8.7 V with a ±10% tolerance, tested at 20 mA. Key electrical parameters include a maximum reverse current of 30 µA at 6.5 V and a Zener impedance of 8 Ω at 0.25 mA. The device operates within a temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole integration
• Constructed in a hermetically sealed glass body for environmental protection
• Inherently radiation hard per MicroNote 050

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• General-purpose voltage regulation

Single Zener Diodes Procurement Notes

Verify the specific suffix 'A' indicates the required ±10% tolerance. Confirm the manufacturer origin, as this part number was originally JEDEC registered by Microsemi and is now produced under Microchip Technology. Ensure the package type matches the DO-35 glass axial-lead specification for your board layout.

Single Zener Diodes Selection Notes

Select this component when a standard 8.7 V reference with moderate precision is needed. The ±10% tolerance suits general applications where tighter tolerances are not critical. Consider the thermal resistance of 250 °C/W junction-to-lead for power dissipation calculations in constrained environments.

Single Zener Diodes Part Context

This device belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators. The series offers an extensive selection from 2.4 V to 200 V. The 'A' suffix specifically denotes the standard 10% voltage tolerance variant within this family.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers: 1N5238, 1N5238B, CDLL5238A, MX1N5238E3TR.