1N4914A

Overview

The Microchip Technology 1N4914A is a temperature-compensated Zener diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 12.8 V with a tight tolerance of ±5%. The device is rated for a maximum power dissipation of 400 mW and exhibits a maximum Zener impedance of 25 Ohms at the test current. It operates within an extended temperature range from -55°C to +175°C, ensuring stability in harsh environments. The component utilizes a DO-7 (DO-204AA) axial through-hole package, providing robust mechanical mounting for circuit integration.

Feature Summary

• Temperature compensation ensures stable voltage regulation across wide thermal variations
• High reliability construction suitable for demanding industrial and military environments
• Precision voltage reference capability with tight manufacturing tolerances

Applications

• Precision voltage reference circuits requiring thermal stability
• Overvoltage protection in sensitive electronic systems
• Industrial control equipment operating under extreme temperature conditions

Procurement Notes

Verify the specific manufacturer source, as historical data indicates production by Microsemi, now part of Microchip Technology. Confirm the package type matches the required DO-7 axial lead configuration. Ensure the voltage tolerance and power rating align with the design specifications before finalizing procurement orders.

Selection Notes

Select this component when a stable 12.8 V reference is needed with high thermal stability. The 400 mW power rating suits low-current regulation tasks. Verify that the through-hole DO-7 package fits the PCB layout constraints. Consider the extended temperature range if the application involves significant thermal cycling or high ambient temperatures.

Part Context

This component belongs to the standard Zener diode family used for voltage regulation and reference applications. It serves as a fundamental discrete semiconductor device for maintaining constant voltage levels in electronic circuits. The axial leaded package facilitates easy insertion into printed circuit boards for prototyping and production.

Replacement Considerations

Check for direct equivalents such as the 1N4913 series or other 12.8 V temperature-compensated Zener diodes from compatible manufacturers. Ensure replacement parts match the 400 mW power rating and DO-7 package dimensions for physical compatibility.