1N5940DG

Single Zener Diodes Overview

The Microsemi 1N5940DG is a 1.5-watt Zener diode with a nominal voltage of 43 V and a 1% tolerance, housed in a DO-41 glass package. It operates within a junction temperature range of -65°C to +175°C and features hermetically sealed construction for high reliability.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless hard glass casing with tungsten slugs
• Metallurgically enhanced internal contact design for lower thermal resistance
• Non-sensitive to electrostatic discharge per MIL-STD-750 method 1020
• Inherently radiation hard

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• High-reliability applications requiring hermetic sealing
• Radiation-hardened circuit designs

Single Zener Diodes Procurement Notes

Verify the specific suffix 'D' indicates a 1% tolerance level as defined in the part nomenclature. Confirm RoHS compliance status by checking for the '(e3)' designation, as commercial versions are available but military equivalents may differ. Ensure the required screening level matches the project specifications.

Single Zener Diodes Selection Notes

Select this component when a precise 43 V reference is needed with tight 1% tolerance. The DO-41 axial lead package allows flexible mounting. Consider the higher rated temperature capability compared to plastic-body constructions if thermal management is critical.

Single Zener Diodes Part Context

This device belongs to the 1N5913BG through 1N5956BG series of 1.5-watt Zener diodes. The series provides voltage regulation from 3.3 V to 200 V. The 'G' suffix denotes the glass encapsulation, while the 'D' specifies the 1% voltage tolerance.

Single Zener Diodes Replacement Considerations

Equivalent parts include 1N5940B (5% tolerance) or 1N5940A (10% tolerance). For identical 1% tolerance, verify availability of other manufacturers' 1N5940 variants in the DO-41 package.