1N4775/TR

Overview

The Microchip Technology 1N4775/TR is a temperature-compensated Zener reference diode housed in a DO-35 axial leaded package. It provides a nominal Zener voltage of 8.5 V with a tolerance of ±5%. The device operates within a power dissipation rating of 500 mW and maintains a maximum reverse leakage current of 100 nA. It features a Zener impedance of 50 Ohms at a test current of 7 mA. The component supports an operating temperature range from -65°C to +175°C and utilizes reel packaging for automated assembly.

Feature Summary

• Temperature compensated design ensures stable voltage reference performance across wide thermal variations
• Low-level operation capability suitable for precision reference applications
• Axial through-hole construction compatible with standard PCB mounting techniques

Applications

• Precision voltage reference circuits requiring thermal stability
• Temperature compensation networks in analog signal conditioning
• Regulator reference inputs where low drift is critical

Procurement Notes

Verify the specific suffix /TR indicates reel packaging configuration against the manufacturer's official documentation. Confirm RoHS compliance status directly with Microchip Technology as regulatory markings may vary by production batch. Ensure the DO-35 package dimensions match your board layout requirements before finalizing procurement orders.

Selection Notes

Select this component when a stable 8.5 V reference is required under varying thermal conditions. The temperature-compensated characteristic distinguishes it from standard Zener diodes, making it suitable for high-precision analog applications. Verify that the 500 mW power rating meets the circuit's thermal dissipation needs during continuous operation.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. The 1N4775 variant specifically denotes the 8.5 V temperature-compensated version within this family. The /TR suffix typically identifies the tape-and-reel packaging format used for surface mount or automated through-hole insertion processes.

Replacement Considerations

Cross-reference with other manufacturers' 8.5 V temperature-compensated Zener diodes in DO-35 packages. Verify electrical parameters such as Zener impedance and leakage current match the original specifications to ensure circuit compatibility.