1N6487

Overview

The Microchip Technology 1N6487 is a military-qualified Zener voltage regulator diode designed for high-reliability applications. It features a hermetically sealed voidless glass package with an internal metallurgical bond, ensuring robust construction. The device provides a nominal Zener voltage of 3.9 V at a test current of 64 mA. It operates within a junction temperature range of -65°C to +175°C and dissipates up to 1.5 W of steady-state power. Standard tolerance is ±5%, with tighter options available via suffix codes.

Feature Summary

• Hermetically sealed voidless glass construction with tungsten slugs
• Internal Category III metallurgical bonds for enhanced reliability
• Triple-layer passivation for environmental protection
• Qualified per MIL-PRF-19500/406 standards

Applications

• High-reliability aerospace systems
• Military-grade voltage regulation circuits
• Radiation-hardened electronic designs
• Critical infrastructure power supplies

Procurement Notes

Verify the specific reliability level (JAN, JANTX, JANTXV, or JANS) required for your application, as this affects qualification standards. Confirm RoHS compliance status, noting that compliant versions are commercial grade only. Check for tolerance suffixes if tighter than standard 5% accuracy is needed. Ensure ordering specifications match the exact JEDEC type number and package configuration.

Selection Notes

Select based on required Zener voltage and operating temperature range. Consider the thermal impedance characteristics for pulsed versus continuous operation. Evaluate the need for specific military qualification levels against cost constraints. Verify lead material compatibility if soldering processes require specific alloy compositions.

Part Context

This component belongs to the 1N6485–1N6491 series of 1.5-watt Zener diodes. These devices share similar mechanical and electrical characteristics, differing primarily in nominal breakdown voltage. They are part of a broader family of industry-recognized regulators offering extensive voltage selections from 3.3 to 200 volts.

Replacement Considerations

Direct substitutes include other 1N6487 variants with different reliability suffixes (e.g., JAN1N6487). Cross-reference with equivalent MIL-PRF-19500/406 qualified parts from other manufacturers if availability is constrained.