JAN1N979D-1

Single Zener Diodes Overview

The JAN1N979D-1 is a silicon Zener diode from the 1N957B-1 through 1N992B-1 series, manufactured by Microchip Technology. It provides a nominal Zener voltage of 56 V with a tight tolerance of ±1%. The device operates in a hermetically sealed axial-lead glass DO-35 (DO-204AH) package and is qualified to MIL-PRF-19500/117 standards for military reliability levels including JAN, JANTX, and JANTXV. It features an internal metallurgical bond and supports a maximum steady-state power dissipation of 0.5 W.

Single Zener Diodes Feature Summary

• Military-grade qualification per MIL-PRF-19500/117 ensuring high reliability
• Hermetically sealed glass DO-35 package with internal metallurgical bond
• Inherently radiation hard design suitable for harsh environments
• Non-sensitive to electrostatic discharge (ESD)

Single Zener Diodes Applications

• Voltage regulation over broad operating current and temperature ranges
• Reference voltage sources in precision circuits
• Transient voltage suppression in sensitive electronics

Single Zener Diodes Procurement Notes

Verify that the component matches the specific JAN reliability level required for your application. Confirm the package type is the standard axial-lead DO-35 variant. Ensure the ordering suffix indicates the correct RoHS compliance status if environmental regulations apply to your deployment. Cross-reference the part number against the manufacturer's latest datasheet to confirm availability and any potential obsolescence notices.

Single Zener Diodes Selection Notes

Select this component when a precise 56 V reference with ±1% tolerance is necessary. The DO-35 package is suitable for through-hole mounting where space permits. Consider the thermal resistance characteristics for derating calculations at elevated temperatures. Verify that the 0.5 W power rating aligns with the expected load conditions in your circuit design.

Single Zener Diodes Part Context

This part belongs to the 1N957B-1 through 1N992B-1 series of 0.5 W Zener diodes. The series offers a wide selection of voltages from 6.8 V to 200 V. Variants are available with different tolerances, indicated by suffixes B (±5%), C (±2%), and D (±1%). Military versions cover the range from 1N962B-1 through 1N992B-1.

Single Zener Diodes Replacement Considerations

Equivalent parts include JAN1N979C-1 for ±2% tolerance and JAN1N979B-1 for ±5% tolerance. Commercial equivalents without military qualification may also be considered if reliability requirements allow.