1N4574/TR

Single Zener Diodes Overview

The Microchip Technology 1N4574/TR is a temperature-compensated Zener reference diode with a nominal voltage of 6.4 V and a maximum temperature coefficient of 0.0005%/°C. It operates at a test current of 1.0 mA, features a maximum reverse current of 2 µA at 3 V, and has a dynamic impedance of 100 Ohms. The device is housed in a DO-7 (DO-204AA) glass axial-leaded package, dissipates 500 mW, and supports an operating temperature range from -65°C to +175°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 flexible axial-leaded mounting terminals

Single Zener Diodes Applications

• Instrumentation circuits requiring stable voltage references
• Circuit designs demanding low voltage drift across wide temperature ranges
• Military qualification applications when ordered with JAN or JANTX prefixes

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against your design needs. The TR suffix indicates tape and reel packaging per EIA-296 standards. Confirm that the standard JEDEC registration meets your project specifications, as military qualifications require additional prefixes like JAN or JANTXV. Ensure the DO-7 package dimensions align with your PCB layout constraints before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a 6.4 V reference with ultra-low temperature drift is required. The 1N4574 series offers a temperature coefficient as low as 0.0005%/°C at a 1.0 mA test current. Consider the DO-7 package for through-hole mounting. If tighter voltage tolerances are needed, add hyphenated suffixes such as -1% or -2% to the part number during ordering.

Single Zener Diodes Part Context

This device belongs to the popular 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 to suit different precision requirements. These diodes are designed for high stability and are available in hermetically sealed glass cases suitable for harsh environments.

Single Zener Diodes Replacement Considerations

Equivalent surface mount versions are available in the DO-213AA package by adding the UR-1 suffix to the part number. Military equivalents can be sourced by adding JAN, JANTX, or JANTXV prefixes. Radiation-hardened variants exist with the RH prefix instead of 1N.