1N4910A/TR

Overview

The Microchip Technology 1N4910A/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 a 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 maintains stability across an operating temperature range from -65°C to +175°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 needing accurate voltage regulation

Procurement Notes

Verify the specific suffix TR indicates reel packaging when ordering. Confirm the 12.8 V Zener voltage and 400 mW power dissipation requirements match the target circuit design. Ensure the DO-7-2 through-hole package fits the PCB layout constraints. Check that the 5% voltage tolerance meets the system accuracy needs. Validate the extended temperature range suitability for the intended application environment.

Selection Notes

Select this component when standard Zener diodes exhibit unacceptable drift due to temperature changes. The temperature compensation feature makes it superior to basic Zener types for precision applications. Consider the 50 Ohm impedance if low dynamic resistance is required. The high maximum operating temperature allows use in harsh environments where other semiconductors might fail. Evaluate the 15 uA leakage current against noise sensitivity requirements.

Part Context

This part belongs to Microchip's temperature-compensated Zener diode family, which provides enhanced stability compared to standard voltage regulators. The 1N4910A variant specifically targets the 12.8 V regulation point. The TR suffix denotes tape and reel packaging for automated assembly processes. This series is engineered for applications where long-term stability and thermal performance are critical design parameters.

Replacement Considerations

Direct substitutes must offer identical 12.8 V Zener voltage, temperature compensation, and DO-7-2 package compatibility. Verify equivalent power dissipation and impedance characteristics before substitution.