1N829A

Single Zener Diodes Overview

The Microchip Technology 1N829A is a temperature compensated Zener reference diode housed in a DO-35 (DO-204AH) glass axial-lead package. It provides a nominal voltage of 6.2 V with a tolerance range of 5.9 V to 6.5 V at a test current of 7.5 mA. The device features a maximum Zener impedance of 10 Ohms and a maximum reverse leakage current of 2 µA at 3 V. It operates within a temperature range of -65°C to +175°C, dissipating up to 500 mW of power. The effective temperature coefficient is 0.0005 %/°C over the -55°C to +100°C range.

Single Zener Diodes Feature Summary

• Provides minimal voltage changes over a broad temperature range for stable voltage references
• Features internal metallurgical bond construction when ordered with the -1 suffix
• Offers flexible axial-lead mounting terminals suitable for through-hole applications

Single Zener Diodes Applications

• Instrumentation circuits requiring stable voltage references
• Circuit designs demanding low voltage drift across wide temperature ranges
• Precision measurement systems utilizing zero-temperature coefficient characteristics

Single Zener Diodes Procurement Notes

Verify the specific ordering suffixes required for your application. The base part number denotes standard specifications. Adding a "-1" suffix indicates an internal metallurgical bond. Military qualifications require JAN, JANTX, or JANTXV prefixes combined with the "-1" suffix. Tape and reel packaging requires a "TR" suffix. Confirm that the DO-35 package dimensions align with your PCB layout constraints before finalizing orders.

Single Zener Diodes Selection Notes

Select this component when a highly stable voltage reference near 6.2 V is needed with minimal thermal drift. The 1N829A offers one of the lowest temperature coefficients in the series. Ensure the operating current remains close to 7.5 mA for optimal stability. Consider the -1 suffix if hermetic sealing via metallurgical bonds is necessary for harsh environments. Verify that the 500 mW power dissipation rating accommodates your circuit's thermal conditions.

Single Zener Diodes Part Context

This diode belongs to the popular 1N821 thru 1N829A series of Zero-TC Reference Diodes. The series includes options for both 6.2 V and 6.55 V nominal voltages. While the standard 1N829A uses conventional bonding, the -1 variant utilizes internal metallurgical bonds. The series also supports military qualifications and radiation-hardened versions under different prefixes.

Single Zener Diodes Replacement Considerations

Direct substitutes include other members of the 1N821-1N829A series with matching voltage and impedance. For tighter tolerances, variants like 1N829A-1-1% are available. Surface mount equivalents exist in the DO-213AA package with UR-1 suffixes.