JAN1N749D-1

Single Zener Diodes Overview

The JAN1N749D-1 is a military-grade Zener diode manufactured by Microchip Technology. It provides a nominal Zener voltage of 4.3 V with a tight tolerance of ±1%. The device operates in the through-hole DO-204AH (DO-35) axial package and dissipates up to 500 mW. It is tested at 20 mA, exhibits a maximum reverse leakage current of 3 µA, and maintains a Zener impedance of 18 Ohms. The component supports an extended operating temperature range from -65°C to +175°C.

Single Zener Diodes Feature Summary

• Military-grade reliability compliant with MIL-PRF-19500/435 specifications
• High precision voltage regulation with ±1% tolerance
• Extended thermal stability for extreme environment operation

Single Zener Diodes Applications

• Precision voltage reference circuits in aerospace systems
• Overvoltage protection in military communication equipment
• Voltage clamping in high-reliability industrial control units

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required package and testing standards. Confirm compliance with specific defense contracts or quality certifications if mandated by the end application. Ensure the procurement channel is authorized to prevent counterfeit components. Check for any recent product change notices affecting assembly sites or labeling.

Single Zener Diodes Selection Notes

Select this component when strict voltage accuracy and wide temperature performance are critical. The low leakage current and stable impedance make it suitable for sensitive analog front ends. Consider the axial leaded package for standard PCB mounting or wire-wrap applications requiring robust mechanical connections.

Single Zener Diodes Part Context

This part belongs to the JAN series of Zener diodes designed for harsh environments. It serves as a rugged alternative to commercial variants, ensuring consistent electrical characteristics under significant thermal and mechanical stress. The series is widely utilized in defense, aviation, and space electronics where failure is not an option.

Single Zener Diodes Replacement Considerations

Direct replacements include JANTXV1N749DUR-1 for surface mount needs or JAN1N5521D-1/TR for similar through-hole specifications. Verify pinout compatibility and ensure the substitute meets the same MIL-PRF-19500/435 qualification level.