1N4128-1

Single Zener Diodes Overview

The Microchip Technology 1N4128-1 is a 500 mW metallurgically bonded glass Zener diode in an axial-lead DO-35 package. It provides a nominal Zener voltage of 60 V with a standard tolerance of ±5%. The device operates within a junction and storage temperature range of -65°C to +175°C. Electrical characteristics include a maximum dynamic impedance (ZZT) of 400 Ohms at a test current of 250 µA, and a maximum reverse leakage current of 10 µA at 45.6 V.

Single Zener Diodes Feature Summary

• Constructed with an internal metallurgical bond for high reliability.
• Hermetically sealed in an axial-lead glass DO-35 package.
• Capable of regulating voltage across broad ranges of current and temperature.
• Qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS levels.

Single Zener Diodes Applications

• Voltage regulation in high-reliability military applications
• Circuit protection requiring radiation hardness
• Precision reference voltage generation

Single Zener Diodes Procurement Notes

Verify the specific qualification level required for your application, as the base part number covers multiple reliability grades including JAN, JANTX, JANTXV, and JANS. Confirm RoHS compliance status if environmental regulations apply, noting that compliant versions are typically available only in commercial grades. Ensure the ordering suffix matches the desired packaging option, such as tape and reel, by consulting the manufacturer's nomenclature guide.

Single Zener Diodes Selection Notes

Select this component when a 60 V breakdown voltage is needed in a through-hole axial configuration. Consider the 400 Ohm dynamic impedance for noise-sensitive designs, as higher voltage Zeners generally exhibit increased impedance. Verify thermal derating requirements against your operating ambient temperature, as power dissipation decreases linearly above 50°C lead temperature.

Single Zener Diodes Part Context

This device belongs to the 1N4099-1 through 1N4135-1 series of 500 mW Zener diodes manufactured by Microchip Technology. These components share a common DO-35 glass package and metallurgical bonding technology. The series offers a wide voltage selection from 1.8 V to 100 V with various tolerance options.

Single Zener Diodes Replacement Considerations

JANS1N4128C-1

Single Zener Diodes FAQ

What is the maximum noise density specified for the 1N4128-1?

The maximum noise density is 40 μV/√Hz at the test current of 250 µA.

How does the power rating change with temperature?

The rated average power dissipation of 0.5 W must be linearly derated starting at a lead temperature of 50°C, reaching zero at 175°C.