1N4775A-1

Overview

The 1N4775A-1 is a temperature-compensated Zener reference diode manufactured by Microchip Technology. It features an 8.5 V nominal Zener voltage with a tight ±1% tolerance, ensuring high precision for voltage regulation applications. The device is designed for through-hole mounting in the DO-35 (DO-204AH) axial glass package. It operates with a maximum power dissipation of 250 mW and exhibits a maximum dynamic impedance of 200 Ohms. The component utilizes silicon technology and includes tin-lead terminal plating for reliable soldering connections.

Feature Summary

• Temperature compensated design for stable voltage reference performance across operating ranges
• High precision voltage regulation with ±1% tolerance on nominal Zener voltage
• Through-hole axial construction suitable for standard PCB mounting techniques

Applications

• Precision voltage reference circuits requiring low drift
• Voltage regulator designs utilizing temperature-compensated references
• Test and measurement equipment calibration standards

Procurement Notes

Verify the specific suffix -1 indicates the ±1% tolerance variant distinct from standard tolerance versions. Confirm RoHS compliance status as some variants may be non-RoHS. Ensure the DO-35 package dimensions match the target footprint. Check export control classification EAR99 requirements for the destination region. Validate supplier authorization to guarantee genuine Microchip components.

Selection Notes

Select this component when precise voltage referencing is critical and temperature stability is required. The ±1% tolerance offers superior accuracy compared to standard Zener diodes. Consider the 250 mW power rating for thermal management in compact designs. The axial leaded package facilitates easy integration into legacy or through-hole dominated circuit layouts.

Part Context

This part belongs to the 1N47xx series of temperature-compensated Zener reference diodes produced by Microchip Technology. These devices are engineered to provide stable reference voltages by combining Zener and avalanche breakdown mechanisms. The series is widely used in analog circuits where voltage stability over temperature variations is essential for accurate signal processing and regulation.

Replacement Considerations

• 1N4775A/TR
• 1N4775A

FAQ

What is the significance of the temperature compensation in this diode?

Temperature compensation minimizes the change in Zener voltage with respect to temperature fluctuations, providing a more stable reference voltage compared to standard Zener diodes.

Does the -1 suffix affect the electrical function beyond tolerance?

The -1 suffix specifically denotes the ±1% voltage tolerance grade. It does not alter the fundamental Zener voltage or power handling capabilities compared to other tolerance variants in the same series.