1N4770A/TR

Overview

The 1N4770A/TR is a temperature-compensated Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 9.1 V with a tolerance of ±5%. The device operates in the DO-35 axial through-hole package and dissipates up to 500 mW of power. It is designed for low current applications, typically tested at 1 mA, and exhibits a maximum reverse leakage current of 10 µA at 25°C. The component supports an operating temperature range from -65°C to +175°C.

Feature Summary

• Temperature compensated design ensures stable reference voltage across wide thermal ranges
• Metallurgically bonded construction with double plug configuration for reliability
• Low current operation optimized for precision regulation at 1 mA test current

Applications

• Precision voltage reference circuits requiring thermal stability
• Temperature compensated regulator designs
• Low current protection applications

Procurement Notes

Verify the specific suffix TR indicates reel packaging when ordering. Confirm compliance requirements such as RoHS status directly with the manufacturer or authorized distributors, as documentation may vary. Ensure the required axial lead form factor matches the target PCB layout constraints before finalizing procurement decisions.

Selection Notes

Select this component when a stable 9.1 V reference is needed under varying thermal conditions. The DO-35 package suits through-hole assembly processes. Consider the 500 mW power dissipation limit and ensure adequate heat sinking if operating near maximum ratings. Verify that the 1 mA test current aligns with the circuit's biasing requirements.

Part Context

This part belongs to the 1N4765 through 1N4774A series of temperature-compensated Zener reference diodes. These devices are engineered for applications demanding high stability over temperature. The 1N4770A variant specifically targets the 9.1 V nominal voltage segment within this established family of precision semiconductor references.

Replacement Considerations

Cross-reference with other manufacturers' 1N4770A equivalents. Verify pinout compatibility and electrical parameters such as Zener impedance and leakage current. Ensure the replacement maintains the same DO-35 axial package dimensions for mechanical fit.