1N4619-1/TR

Single Zener Diodes Overview

The Microchip Technology 1N4619-1/TR is a 500 mW metallurgically bonded glass Zener diode in the axial-lead DO-35 package. It provides a nominal Zener voltage of 3.0 V at a test current of 250 µA with a maximum dynamic impedance of 1600 Ohms and a reverse leakage current of 1.0 µA. The device operates within a junction temperature range of -65°C to +175°C, features a thermal resistance of 300 °C/W, and includes a tape-and-reel option indicated by the TR suffix.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for high reliability
• Qualified per MIL-PRF-19500/435 standards
• Hermetically sealed glass DO-35 package

Single Zener Diodes Applications

• High reliability voltage regulation
• Radiation-hardened circuit protection
• Military and aerospace electronic systems

Single Zener Diodes Procurement Notes

Verify that the specific ordering suffix matches the required qualification level (JAN, JANTX, JANTXV, or JANS) and packaging format. Confirm RoHS compliance status as it varies between commercial and military grades. Ensure the TR suffix is present if tape-and-reel packaging is required for automated assembly processes.

Single Zener Diodes Selection Notes

Select this component when a stable 3.0 V reference is needed under extreme environmental conditions. The low noise density characteristic makes it suitable for sensitive analog circuits. Verify that the operating current remains near the specified 250 µA test point to maintain accurate voltage regulation and minimize power dissipation issues.

Single Zener Diodes Part Context

This part belongs to the 1N4614-1 through 1N4627-1 series of 500 mZener diodes manufactured by Microchip Technology. These devices are designed for demanding applications requiring robust performance across wide temperature ranges and are available in various reliability grades including commercial and space-qualified options.

Single Zener Diodes Replacement Considerations

Compatible substitutes include other 3.0 V Zener diodes from the same family, such as the JAN1N4619-1 or JANTX1N4619-1, provided they meet the specific MIL-PRF-19500/435 qualification requirements and physical package dimensions.

Single Zener Diodes FAQ

What is the maximum noise density for the 1N4619-1?

The maximum noise density is 87 µV/√Hz at the specified test current.

How is polarity indicated on the device?

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