1N4911A/TR

Overview

The Microchip Technology 1N4911A/TR is a temperature-compensated Zener diode designed for precision voltage regulation. It features a nominal Zener voltage of 12.8 V with a tight tolerance of 5%. The device operates in the DO-7-2 through-hole package and dissipates up to 400 mW. Key electrical characteristics include a maximum reverse leakage current of 15 uA, a Zener impedance of 50 Ohms, and a test current of 4 mA. It supports an extended operating junction temperature range from -65°C to +175°C and exhibits a low voltage temperature coefficient of 0.002%/°C.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High reliability construction suitable for demanding industrial environments
• Precision voltage reference capability with tight tolerance specifications

Applications

• Precision voltage reference circuits requiring thermal stability
• Industrial control systems operating under extreme temperature conditions
• Test and measurement equipment calibration standards

Procurement Notes

Verify the specific suffix TR indicates reel packaging when ordering. Confirm the 12.8 V Zener voltage specification matches the circuit requirements. Ensure the DO-7-2 through-hole package fits the board layout. Check that the 400 mW power dissipation rating accommodates the expected load current. Validate the extended temperature range meets the operational environment needs.

Selection Notes

Select this component when standard Zener diodes fail to maintain accuracy due to thermal drift. The 12.8 V output provides a stable reference point for analog signal processing. The through-hole DO-7-2 package offers robust mechanical mounting for high-vibration applications. Consider the 50 Ohm impedance for dynamic load response requirements.

Part Context

This part belongs to Microchip's specialized temperature-compensated Zener diode family. These components are engineered to minimize voltage drift caused by temperature changes. They serve as critical references in high-precision analog circuits where standard diodes would introduce significant error.

Replacement Considerations

Consult official substitution lists for compatible temperature-compensated Zener diodes with matching 12.8 V ratings and DO-7-2 packages.