1N4775A-1/TR

Overview

The Microchip Technology 1N4775A-1/TR is a temperature-compensated Zener reference diode with an 8.5 V nominal voltage and ±1% tolerance. It operates in the DO-204AH (DO-35) through-hole package, dissipating up to 250 mW. Key electrical parameters include a maximum impedance of 200 Ohms and a test current typically associated with this series. The component supports an operating temperature range from -65°C to +175°C.

Feature Summary

• Temperature-compensated design for stable reference performance
• High precision voltage tolerance for critical applications
• Through-hole construction for standard PCB mounting

Applications

• Precision voltage reference circuits
• Temperature-stable power supply regulation
• Calibration equipment references

Procurement Notes

Verify the specific suffix '-1' indicates the ±1% tolerance variant distinct from the standard ±5% version. Confirm the '/TR' suffix denotes reel packaging requirements. Ensure the manufacturer is identified as Microchip Technology or its authorized predecessor entities to guarantee authenticity and datasheet alignment.

Selection Notes

Select this component when high accuracy is required over standard Zener diodes. The temperature compensation feature makes it suitable for environments with significant thermal fluctuations. Compare against standard 1N4775A variants if tighter tolerance is not necessary for the specific circuit design constraints.

Part Context

This part belongs to the 1N47xx series of Zener diodes, specifically the temperature-compensated reference subset. Unlike standard Zeners that exhibit positive or negative temperature coefficients, this device utilizes a combination of Zener and avalanche breakdown mechanisms to achieve near-zero temperature drift across its operating range.

Replacement Considerations

Public confirmed substitutes include the 1N4775A-1 from Microsemi/Microchip. Verify pinout compatibility with DO-35 packages before substitution.