1N5248A

Single Zener Diodes Overview

The Microchip Technology 1N5248A is a 0.5 W glass axial-lead Zener diode in the DO-35 package. It provides an 18 V nominal Zener voltage with a ±10% tolerance (suffix A). The device operates at a test current of 7.0 mA and exhibits a maximum reverse leakage current of 600 μA at 10 V. Key electrical parameters include a Zener impedance of 21 Ω at 0.25 mA, a forward voltage of 1.5 V max at 200 mA, and a temperature coefficient of +0.085 %/°C. It supports an operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features minimal capacitance for high-frequency applications
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• Voltage reference circuits
• Overvoltage protection
• Clamping applications

Single Zener Diodes Procurement Notes

Verify the specific suffix 'A' to confirm the 10% voltage tolerance requirement. Ensure the procurement order specifies the standard JEDEC registered version unless military screening prefixes or RoHS compliant 'e3' suffixes are explicitly required by the design specifications.

Single Zener Diodes Selection Notes

Select this component when a precise 18 V reference is needed within a 10% tolerance band. Consider the positive temperature coefficient for thermal stability requirements. Verify that the 0.5 W power dissipation rating aligns with the expected load conditions and ambient thermal environment.

Single Zener Diodes Part Context

This part belongs to the 1N5221 through 1N5281B series of 0.5 W Zener Voltage Regulators manufactured by Microsemi's Scottsdale Division. The series offers a wide selection of voltages from 2.4 V to 200 V in standard glass axial-lead packages.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N5248B for tighter 5% tolerance or the 1N5248Be3/TR for RoHS compliance. Surface mount equivalents like MLL5248B are available in DO-213AA MELF packages.

Single Zener Diodes FAQ

What is the temperature coefficient for the 1N5248A?

The maximum Zener voltage temperature coefficient is +0.085 %/°C.

How is polarity indicated on the device?

Polarity is indicated by a band on the glass body; the banded end represents the cathode.