1N4899A/TR

Single Zener Diodes Overview

The 1N4899A/TR is a temperature-compensated Zener diode manufactured by Microchip Technology. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The device has a maximum power dissipation of 400 mW and a maximum Zener impedance of 400 Ohms. It operates within a temperature range of -55°C to 100°C. The component utilizes a DO-7 axial through-hole package and is supplied in a reel packaging format.

Single Zener Diodes Feature Summary

• Temperature compensated design for stable voltage regulation across varying thermal conditions
• Through-hole axial leaded construction for standard PCB mounting

Single Zener Diodes Applications

• Voltage reference circuits requiring thermal stability
• Precision voltage regulation applications
• Overvoltage protection in sensitive electronic systems

Single Zener Diodes Procurement Notes

Verify the specific suffix TR indicates reel packaging when sourcing. Confirm the manufacturer is Microchip Technology, as this part number follows legacy JEDEC standards that may be produced by multiple vendors. Ensure the DO-7 package dimensions match your board layout requirements before finalizing procurement.

Single Zener Diodes Selection Notes

Select this component when a precise 12.8 V reference with low temperature drift is required. The 400 mW power rating suits low-current applications. Verify that the ±5% tolerance meets circuit accuracy needs. Consider the through-hole package constraints against available surface-mount alternatives if space is limited.

Single Zener Diodes Part Context

This part belongs to the 1N48xx series of Zener diodes, which are widely used for voltage regulation. The 'A' suffix typically denotes tighter tolerance or specific characteristics compared to non-suffixed versions. The '/TR' suffix specifically identifies the tape and reel packaging variant intended for automated assembly processes.

Single Zener Diodes Replacement Considerations

Check datasheets for equivalent parts from other manufacturers producing the 1N4899A specification. Verify pinout compatibility and ensure replacement components meet the same 12.8 V nominal voltage and 400 mW power dissipation ratings.