1N4986

Single Zener Diodes Overview

The Microchip Technology 1N4986 is a military-qualified, voidless hermetically sealed glass Zener diode rated for 5 watts of power dissipation. It features a nominal Zener voltage of 150 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and utilizes an axial lead 'E' package. Key electrical characteristics include a test current (IZT) of 8 mA, a maximum Zener impedance (ZZT) of 330 Ohms at IZT, and a maximum reverse leakage current of 2 µA at 114 V. The voltage temperature coefficient is specified at 0.105 %/°C.

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.
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020.

Single Zener Diodes Applications

• High-reliability aerospace systems where failure cannot be tolerated.
• Military electronic circuits requiring robust voltage regulation.
• Radiation-hardened environments utilizing the component's inherent hardness.

Single Zener Diodes Procurement Notes

Verify that the specific order includes the correct suffix if tighter tolerances are required, as the base part number denotes standard 5% tolerance. Confirm compliance with MIL-PRF-19500/356 requirements for your specific application environment. Check for RoHS status, as this series may not be compliant depending on the specific manufacturing batch or variant. Ensure thermal derating curves are consulted for operation above 65°C lead temperature.

Single Zener Diodes Selection Notes

Select the 1N4986 when a stable 150 V reference is needed in harsh environments. Consider the 5 W power rating and axial lead configuration for through-hole mounting. Evaluate the 330 Ohm dynamic impedance for noise sensitivity in the circuit design. Compare against surface-mount equivalents like the 1N4986US if space constraints require a different form factor.

Single Zener Diodes Part Context

This component belongs to the 1N4954 thru 1N4996 series of 5 Watt Zener Voltage Regulators manufactured by Microchip Technology (formerly Microsemi). The series offers a wide selection of voltages from 3.3 V to 390 V. These devices are industry-recognized for their robustness and are available in various tolerance grades and package types, including surface-mount MELF configurations.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers: JAN1N4986C, JANTX1N4986C, JANTX1N4986D, JAN1N4986D.

Single Zener Diodes FAQ

What is the maximum continuous current for the 1N4986?

The maximum continuous regulator current (IZM) for the 1N4986 is 31.6 mA.

How is polarity indicated on the 1N4986 package?

Polarity is indicated by a band on the body of the diode, which marks the cathode end.

What is the surge current rating for the 1N4986?

The maximum Zener surge current (IZSM) for the 1N4986 is 0.75 A under an 8.3 ms square wave condition.