1N4108-1

Single Zener Diodes Overview

The Microchip Technology 1N4108-1 is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 package. It provides a nominal Zener voltage of 14 V with a standard tolerance of ±5%. The device operates within a junction temperature range of -65 °C to +175 °C and features a maximum reverse leakage current of 50 nA at 10.7 V. Electrical characteristics include a test current of 250 µA, a dynamic impedance of 200 Ohms, and a forward voltage of 1.1 V at 200 mA.

Single Zener Diodes Feature Summary

• Constructed with an internal metallurgical bond for enhanced reliability.
• Qualified per MIL-PRF-19500/435 standards for high-reliability applications.
• Hermetically sealed in an axial-lead glass DO-35 package.

Single Zener Diodes Applications

• Voltage regulation over broad ranges of current and temperature
• High-reliability military and aerospace circuits
• Reference voltage generation

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required qualification level (JAN, JANTX, JANTXV, or JANS) as specified in the datasheet part nomenclature. Confirm RoHS compliance requirements, noting that specific environmental markings may apply only to commercial grade versions. Ensure the selected variant aligns with the intended thermal management strategy given the linear power derating curve starting at 50 °C.

Single Zener Diodes Selection Notes

Select this component when a stable 14 V reference is required in harsh environments. The DO-35 package supports flexible axial-lead mounting. Consider the positive temperature coefficient of +0.085 %/°C for thermal stability calculations. Verify that the maximum noise density meets system sensitivity requirements, particularly if operating near the breakdown knee.

Single Zener Diodes Part Context

This device belongs to the 1N4099-1 through 1N4135-1 series of 500 mZener regulators. It is JEDEC registered and available in multiple reliability grades including JAN, JANTX, JANTXV, and JANS. The series covers voltages from 1.8 V to 100 V with various tolerance options.

Single Zener Diodes Replacement Considerations

Equivalent parts within the same series include 1N4108D-1 (1% tolerance) and 1N4108/TR (commercial tape and reel). Cross-brand replacements must match the 14 V nominal voltage, 500 mW power rating, and DO-35 package dimensions.

Single Zener Diodes FAQ

What is the temperature coefficient for the 1N4108-1?

The maximum temperature coefficient of Zener voltage is +0.085 %/°C.

How is polarity indicated on the package?

Polarity is indicated by a band; the banded end is the cathode and should be operated positive with respect to the opposite end for Zener regulation.