1N4619-1

Single Zener Diodes Overview

The Microchip Technology 1N4619-1 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. Key electrical parameters include a maximum Zener impedance of 0.4 Ohms, a maximum reverse current of 1.0 µA, and a noise density of 1 µV/√Hz. The device exhibits a temperature coefficient of -0.075 %/°C and supports a maximum regulator current of 87.0 mA. It is qualified per MIL-PRF-19500/435 for JAN, JANTX, JANTXV, and JANS reliability levels.

Single Zener Diodes Feature Summary

• Internal metallurgical bond construction for high reliability.
• Hermetically sealed axial-lead glass DO-35 package.
• Qualified to military standards including JANS level.
• Low noise density characteristics suitable for precision regulation.

Single Zener Diodes Applications

• Voltage regulation in high-reliability aerospace systems.
• Precision reference circuits requiring low noise performance.
• Radiation-hardened electronic assemblies.

Single Zener Diodes Procurement Notes

Verify the specific reliability grade (JAN, JANTX, JANTXV, or JANS) required for your application, as this affects qualification testing and cost. Confirm RoHS compliance status if environmental regulations apply, noting that RoHS versions are commercial grade only. Ensure the ordering suffix matches the desired tolerance and packaging format. Consult factory documentation for tape and reel availability and specific lead finish options.

Single Zener Diodes Selection Notes

Select the 1N4619-1 when a stable 3.0 V reference is needed with strict noise and leakage requirements. Its negative temperature coefficient must be accounted for in thermal design. The metallurgical bond offers superior durability compared to standard glass junctions. Consider the DO-35 package constraints for board space and mounting orientation. Verify that the operating current remains within the specified test conditions for accurate voltage regulation.

Single Zener Diodes Part Context

This component belongs to the 1N4614-1 through 1N4627-1 series of 500 mZener diodes manufactured by Microsemi (now Microchip Technology). These devices are designed for demanding environments where standard commercial components may fail. The series covers a wide voltage range from 1.8 V to 100 V, offering various tolerance options. The 1N4619-1 specifically targets the lower end of this voltage spectrum with precise regulation capabilities.

Single Zener Diodes Replacement Considerations

Direct replacements must match the 3.0 V Zener voltage, 500 mW power rating, and DO-35 package. Verify that substitute parts meet the same MIL-PRF-19500/435 qualification levels if radiation hardness or extreme reliability is required. Check for equivalent noise density and temperature coefficient specifications to ensure circuit stability is maintained.