JAN1N4494D

Single Zener Diodes Overview

The JAN1N4494D is a military-qualified Zener voltage regulator diode from the 1N4460–1N4496 series, manufactured by Microchip Technology. It features a hermetically sealed voidless glass package with tungsten slugs and internal metallurgical bonds. The device provides a nominal Zener voltage of 160 V at a test current of 1.6 mA. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 1.5 W. The suffix 'D' indicates a tight tolerance of ±1%.

Single Zener Diodes Feature Summary

• Hermetically sealed voidless glass construction with internal metallurgical bonds for high reliability
• Qualified per MIL-PRF-19500/406 for use in applications where failure cannot be tolerated
• Inherently radiation hard as described in Microsemi MicroNote 050
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 method 1020

Single Zener Diodes Applications

• High-reliability aerospace and defense systems
• Voltage regulation over broad operating current and temperature ranges
• Circuit protection requiring inherent radiation hardness

Single Zener Diodes Procurement Notes

Verify that the specific part number matches the required qualification level (JAN) and tolerance code (D). Confirm compliance requirements such as RoHS status, noting that non-RoHS versions are standard for this military grade. Ensure ordering specifications align with the manufacturer's documentation for the 1N4460–1N4496 series.

Single Zener Diodes Selection Notes

Select this component when a precise 160 V reference is needed in harsh environments. The ±1% tolerance ensures tight voltage accuracy. Consider the DO-41 axial lead package for through-hole mounting. Verify thermal derating curves if operating near maximum power dissipation limits.

Single Zener Diodes Part Context

This device belongs to the industry-recognized 1N4460–1N4496 series of 1.5 Watt glass Zener diodes. The series offers extensive selections from 3.3 to 200 volts. The JAN prefix denotes the highest reliability level available for this series, suitable for critical mission applications.

Single Zener Diodes Replacement Considerations

Equivalent parts include other manufacturers' 1N4494Z or 1N4494A diodes. For military specifications, verify compatibility with MIL-PRF-19500/406 standards. Commercial equivalents may lack hermetic sealing and radiation hardness.