1N4782A

Overview

The Microchip Technology 1N4782A is a temperature-compensated Zener diode designed for high-reliability voltage reference applications. It features an 8.5V nominal Zener voltage and operates within a wide temperature range from -65°C to +175°C. The component utilizes a DO-35 glass axial leaded package, ensuring isolation of the case connection. Constructed with silicon, this single-diode device offers stable regulation characteristics suitable for demanding environments where precision and thermal stability are critical requirements.

Feature Summary

• Temperature compensated design for enhanced voltage stability across varying thermal conditions
• High reliability construction utilizing hermetically sealed glass encapsulation
• Wide operational temperature range supporting extreme environmental applications

Applications

• Precision voltage reference circuits requiring thermal stability
• Military and aerospace electronic systems
• High-reliability industrial instrumentation

Procurement Notes

Verify the specific manufacturer source, as the 1N4782A designation appears in documentation from both Microchip Technology and Motorola/NXP. Confirm that the required specifications match the intended application, particularly regarding the 8.5V rating and temperature compensation. Ensure compliance with any relevant military or high-reliability screening standards if applicable to the system design.

Selection Notes

Select this component when a stable 8.5V reference is needed in harsh thermal environments. The temperature-compensated feature distinguishes it from standard Zener diodes, making it ideal for precision analog circuits. Consider the DO-35 through-hole package for manual assembly or legacy board designs requiring robust mechanical mounting.

Part Context

This part belongs to the broader category of silicon Zener voltage regulator diodes. While many variants exist for general regulation, the 1N4782A is specifically engineered for temperature compensation. It shares the DO-35 form factor with other axial diodes but differs internally by incorporating specialized doping profiles to minimize voltage drift over temperature changes.

Replacement Considerations

Cross-reference with other manufacturers' 1N4782A equivalents, such as those from NXP/Motorola, to ensure pinout and electrical parameter compatibility. Verify that substitute components maintain the same temperature coefficient and hermetic sealing properties for equivalent performance.