1N4578-1

Single Zener Diodes Overview

The Microchip Technology 1N4578-1 is a temperature-compensated Zener reference diode with a nominal voltage of 6.4 V. It operates at a test current (IZT) of 2.0 mA and features a maximum voltage temperature coefficient of 0.001%/°C (0.06 mV/°C). The device has a maximum reverse leakage current of 2 µA at 3 V and a dynamic impedance of 50 Ohms at IZT. It is housed in a hermetically sealed glass DO-7 (DO-204AA) axial-leaded package, supports an operating temperature range of -65°C to +175°C, and dissipates up to 500 mW.

Single Zener Diodes Feature Summary

• Temperature compensated design for minimal voltage change over broad operating ranges
• Internal metallurgical bond construction within a hermetically sealed glass case
• Military qualification available via JAN, JANTX, or JANTXV prefixes combined with the -1 suffix

Single Zener Diodes Applications

• Instrumentation circuits requiring stable voltage references
• Precision circuit designs sensitive to temperature variations
• Military electronic systems requiring MIL-PRF-19500/452 compliance

Single Zener Diodes Procurement Notes

Verify that the ordering suffix matches the required military qualification level, as the -1 suffix indicates qualification to MIL-PRF-19500/452 when paired with specific prefixes. Confirm the package type is DO-7 (DO-204AA) and ensure the application accounts for the specified 2.0 mA test current to maintain optimal voltage-temperature stability. Check for RoHS status if environmental compliance is mandatory.

Single Zener Diodes Selection Notes

Select this component when a 6.4 V reference with tight temperature compensation is required. The 1N4578-1 offers a 0.001%/°C coefficient, suitable for applications needing lower drift than standard Zeners. Ensure the circuit allows for the specified 2.0 mA operating current to achieve the rated performance characteristics and verify that the DO-7 through-hole package fits the board layout constraints.

Single Zener Diodes Part Context

This part belongs to the 1N4565 thru 1N4584A-1 series of zero-TC reference diodes manufactured by Microsemi (now Microchip Technology). The series provides various temperature coefficients ranging from 0.01%/°C to 0.0005%/°C at a nominal 6.4 V. The -1 suffix specifically denotes availability in military grades such as JAN, JANTX, and JANTXV, distinguishing it from commercial variants.

Single Zener Diodes Replacement Considerations

Public confirmed substitute part numbers include 1N4578A-1 and 1N4578A-1/TR.