1N5248B

Single Zener Diodes Overview

The Microchip Technology 1N5248B is a 0.5-watt Zener voltage regulator housed in a hermetically sealed glass axial-lead DO-35 (DO-204AH) package. It provides an 18V nominal Zener voltage with a standard ±5% tolerance indicated by the 'B' suffix. The device operates within a temperature range of -65°C to +175°C and features flexible mounting terminals. Electrical characteristics include a maximum reverse current of 100µA at 9.1V, a Zener impedance of 21 Ohms at 0.25mA, and a positive voltage temperature coefficient of +0.085%/°C.

Single Zener Diodes Feature Summary

• Hermetically sealed glass axial-lead construction for environmental stability
• Inherently radiation hard per MicroNote 050
• Non-sensitive to electrostatic discharge (ESD)
• Minimal capacitance across operating ranges

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage generation in electronic circuits
• Protection against voltage transients

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required JEDEC registration and tolerance suffix. Confirm compliance requirements such as RoHS status if applicable, noting that the base 1N5248B may differ from the e3 variant. Ensure the supplier documentation aligns with the manufacturer's official datasheet specifications for electrical parameters and packaging details.

Single Zener Diodes Selection Notes

Select this component when a 0.5W power dissipation rating in a through-hole glass package is required. The 18V breakdown voltage suits applications needing stable reference levels in that range. Consider the positive temperature coefficient for thermal compensation needs. Verify lead length requirements for accurate thermal resistance calculations during board layout.

Single Zener Diodes Part Context

This device belongs to the 1N5221 through 1N5281B series of 0.5-watt Zener diodes. The series offers a wide selection of voltages from 2.4V to 200V. The 1N5248B specifically addresses the 18V segment with standard commercial tolerances. Surface mount equivalents are available in the MLL5221 to MLL5281B series for space-constrained designs.

Single Zener Diodes Replacement Considerations

Equivalent parts include the 1N5248BE3 for RoHS-compliant versions. Surface mount alternatives are the MLL5248B or MLL5248BUR-1 in the DO-213AA MELF package. Military screening options exist via prefixes like MX for JAN grade devices.