1N4578A/TR

Single Zener Diodes Overview

The Microchip Technology 1N4578A/TR is a temperature-compensated Zener reference diode with a nominal voltage of 6.4 V. It operates at a test current 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. It is housed in a DO-7 glass axial package, dissipates 500 mW, and functions within a temperature range of -55°C to +100°C.

Single Zener Diodes Feature Summary

• Provides minimal voltage change over a broad operating temperature range for instrumentation applications
• Features internal metallurgical bonding for enhanced reliability
• Offers tight reference voltage tolerances around the nominal 6.4 V value

Single Zener Diodes Applications

• Instrumentation circuits requiring stable voltage references
• Circuit designs demanding low voltage drift across temperature variations
• Precision analog signal processing systems

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements for your application. The 'TR' suffix indicates tape and reel packaging per EIA-296 standards. Confirm that the standard JEDEC registration meets your quality needs, or check if military prefixes like JAN or JANTX are required for higher qualification levels. Ensure the DO-7 package dimensions align with your PCB layout constraints before finalizing orders.

Single Zener Diodes Selection Notes

Select this component when a 6.4 V reference with a 2.0 mA operating current is needed. The 0.001%/°C temperature coefficient makes it suitable for moderate precision applications compared to tighter tolerance variants like the 1N4579A series. Consider the DO-7 package size and axial lead configuration for through-hole mounting. Verify power dissipation limits relative to ambient temperature derating curves if operating near maximum ratings.

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 and operating currents for 6.4 V nominal voltages. The 1N4578A variant specifically targets the 0.001%/°C coefficient category with a 2.0 mA test current, bridging the gap between higher stability but lower current options and higher current but less stable options.

Single Zener Diodes Replacement Considerations

Public confirmed substitutes include parts from the same series with equivalent electrical characteristics, such as the 1N4578A without the trailing suffix for bulk packaging, or other 1N45xxA variants if temperature coefficient adjustments are acceptable. Military qualified equivalents may use JAN or JANTX prefixes.