1N4782A/TR

Overview

The 1N4782A/TR is a temperature compensated Zener diode manufactured by Microchip Technology. It features an 8.5 V nominal Zener voltage with a tight 5% tolerance and a low voltage temperature coefficient of 0.002%/°C. The device operates in the DO-7-2 axial package with a 250 mW power dissipation rating. Electrical characteristics include a maximum reverse leakage current of 10 µA, a Zener impedance of 100 Ohms at a test current of 1 mA, and a forward voltage of 1.2 V. It supports a wide operating temperature range from -55°C to +100°C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across varying thermal conditions.
• Low voltage temperature coefficient minimizes drift for precision reference applications.
• High reliability construction suitable for demanding through-hole mounting environments.

Applications

• Precision voltage reference circuits requiring thermal stability
• Temperature compensated regulator designs
• Sensitive analog signal conditioning stages

Procurement Notes

Verify the specific suffix and manufacturer documentation to confirm the temperature compensated characteristic and exact electrical limits. Ensure the procurement channel provides official Microchip Technology traceability. Confirm that the DO-7-2 package dimensions match the target PCB layout requirements before finalizing orders.

Selection Notes

Select this component when circuit performance depends on minimal voltage drift over temperature changes. The 8.5 V output level suits specific reference needs where standard Zener voltages are insufficient. Consider the 250 mW power limit and 100 Ohm impedance for biasing network calculations. Verify compatibility with existing assembly processes for axial leaded components.

Part Context

This part belongs to the Microchip Technology Zener Diode family, specifically designed for applications requiring high thermal stability. Unlike standard Zener diodes, the temperature compensated variant utilizes internal junction engineering to counteract voltage shifts caused by heat. This makes it distinct from general-purpose regulators within the broader diode category.

Replacement Considerations

Substitute only with other temperature compensated Zener diodes offering identical 8.5 V nominal voltage and compatible DO-7-2 packaging. Verify that alternative sources guarantee equivalent temperature coefficients and leakage specifications to maintain circuit accuracy.