1N4775A/TR

Overview

The Microchip Technology 1N4775A/TR is a single Zener diode designed for voltage regulation and reference applications. It features an 8.5 V nominal Zener voltage with a ±5% tolerance. The device operates in the DO-204AH (DO-35) axial through-hole package. Key electrical parameters include a power dissipation of 500 mW, a maximum reverse leakage current of 100 nA, and a Zener impedance of 50 Ohms at a test current of 7 mA. It supports a wide operating temperature range from -65°C to +175°C.

Feature Summary

• Temperature-compensated design for stable voltage reference performance across varying thermal conditions
• Single configuration suitable for precision voltage regulation circuits
• Axial leaded construction enabling reliable through-hole mounting on printed circuit boards

Applications

• Precision voltage reference sources in measurement instrumentation
• Voltage regulation in low-power electronic circuits
• Overvoltage protection stages requiring stable breakdown characteristics

Procurement Notes

Verify the specific suffix /TR indicates reel packaging when confirming order details. Ensure the DO-204AH package style matches your board layout requirements. Confirm RoHS compliance status directly with the manufacturer or authorized distributor as regulatory markings may vary by production batch. Cross-reference the part number against official Microchip databases to ensure authenticity and traceability before finalizing procurement.

Selection Notes

Select this component when a stable 8.5 V reference is required with tight tolerance. The temperature compensation feature makes it suitable for environments with significant thermal fluctuations. Verify that the 500 mW power rating meets the circuit's dissipation needs. Ensure the through-hole package fits the assembly process constraints compared to surface-mount alternatives.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. The series offers various voltage options within the DO-204AH package. The 1N4775A variant specifically targets applications needing an 8.5 V regulated output. The /TR suffix typically denotes tape and reel packaging for automated assembly processes.

Replacement Considerations

Compatible substitutes include other 8.5 V temperature-compensated Zener diodes in the DO-35 package. Verify pinout compatibility and thermal resistance characteristics before substitution. Ensure the replacement part meets the same ±5% voltage tolerance and power dissipation ratings.