JANTX1N5520D-1/TR

Single Zener Diodes Overview

The JANTX1N5520D-1/TR is a hermetically sealed, axial-leaded glass Zener voltage regulator manufactured by Microchip Technology. It operates within the MIL-PRF-19500/437 qualified series, providing a nominal Zener voltage of 3.9 V with a tight tolerance of ±1%. The device dissipates up to 0.5 W and features a silicon junction rated for temperatures between -65°C and +175°C. Packaged in the DO-35 (DO-204AH) glass envelope, it ensures reliable performance in demanding environments.

Single Zener Diodes Feature Summary

• Hermetically sealed glass DO-35 package construction
• Qualified per MIL-PRF-19500/437 military standards
• High thermal stability across extended temperature ranges

Single Zener Diodes Applications

• Military aerospace voltage regulation circuits
• Harsh environment reference voltage sources
• High-reliability power supply protection

Single Zener Diodes Procurement Notes

Verify the JAN prefix indicates specific military screening requirements. Confirm the D-1 suffix aligns with the required ±1% tolerance specification. Ensure the DO-35 lead form matches the target PCB footprint. Validate that the manufacturer source is authorized for this qualified component series.

Single Zener Diodes Selection Notes

Select this component when strict voltage accuracy and environmental sealing are mandatory. The 3.9 V rating suits low-voltage reference applications. Consider the 0.5 W power limit for thermal management. Verify compatibility with existing MIL-PRF-19500/437 system architectures.

Single Zener Diodes Part Context

This part belongs to the 1N5518B through 1N5546B series of low-voltage avalanche Zener diodes. These devices offer voltages from 3.3 V to 33 V. The JAN designation signifies full military qualification. The D-1 suffix specifically denotes the tighter manufacturing tolerance compared to standard commercial variants.

Single Zener Diodes Replacement Considerations

Substitute only with parts explicitly listed as equivalent in official Microchip documentation. Generic 1N5520 equivalents lack the required hermetic seal and military screening.