1N4982

Single Zener Diodes Overview

The Microchip Technology 1N4982 is a military-qualified, voidless hermetically sealed glass Zener diode rated for 5 watts of power dissipation. It provides a nominal Zener voltage of 100 V at a test current of 12 mA with a standard tolerance of ±5%. The device features an axial lead configuration and operates within a temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 2 µA at 80 V, a dynamic impedance of 110 Ω at the test current, and a surge current rating of 1.4 A.

Single Zener Diodes Feature Summary

• Hermetically sealed construction using voidless hard glass with tungsten slugs and internal metallurgical bonds.
• Military qualification compliant with MIL-PRF-19500/356 standards for high-reliability applications.
• Inherently radiation hard as described in Microsemi MicroNote 050.
• ESD nonsensitive per MIL-STD-750 Method 1020.

Single Zener Diodes Applications

• High-reliability aerospace and defense circuits where failure cannot be tolerated.
• Voltage regulation in harsh environments requiring extended temperature performance.
• Radiation-hardened electronic systems.

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required voltage tolerance (e.g., 'C' for ±2%, 'D' for ±1%) and package type. Confirm compliance with MIL-PRF-19500/356 requirements for your application. Ensure the procurement specification accounts for the axial lead termination and hermetic sealing characteristics defined in the datasheet.

Single Zener Diodes Selection Notes

Select this component when a 5-watt power rating and 100 V regulation are required in a through-hole axial package. Consider tighter tolerance variants if precision is critical. Verify thermal derating requirements above 65°C lead temperature. Ensure the design accommodates the specified surge current limits and operating temperature range up to 175°C.

Single Zener Diodes Part Context

This part belongs to the 1N4954 through 1N4996 series of 5-watt Zener voltage regulators manufactured by Microchip's Scottsdale Division. The series offers a broad selection of voltages from 3.3 V to 390 V. These devices are industry-recognized for their robust construction and are available in various military grades including JAN, JANTX, JANTXV, and JANS.

Single Zener Diodes Replacement Considerations

Surface-mount equivalents are available in square end-cap MELF configurations with the 'US' suffix (e.g., 1N4982US). Cross-reference with other manufacturers' 5W axial Zener diodes only if mechanical dimensions and electrical parameters match exactly.

Single Zener Diodes FAQ

What is the maximum continuous forward current rating?

The datasheet specifies a forward voltage of 1.50 V at 1.0 A, indicating the device is rated for 1.0 A in the forward direction.

How does the voltage tolerance vary?

Standard parts without a suffix have a ±5% tolerance. Tighter tolerances are available with specific suffixes: 'C' for ±2% and 'D' for ±1%.