1N4898

Overview

The Microchip Technology 1N4898 is a temperature-compensated Zener diode with a nominal voltage of 12.8V and a tolerance of ±5%. It features a maximum power dissipation of 0.5W (500mW) and operates within a junction temperature range of -65°C to +175°C. The device utilizes silicon technology and is housed in a hermetically sealed DO-35 glass axial package. Key electrical characteristics include a Zener impedance of 400 Ohms, making it suitable for precision voltage reference applications requiring stability across wide thermal variations.

Feature Summary

• Temperature compensated design for stable voltage regulation
• Hermetically sealed glass construction for reliability
• Low noise performance characteristics
• Wide operating temperature range capability

Applications

• Precision voltage references in harsh environments
• Temperature compensation circuits
• High-reliability analog signal conditioning
• Military and aerospace electronic systems

Procurement Notes

Verify the specific suffix (e.g., /TR for tape and reel or standard bulk) against your assembly requirements. Confirm RoHS compliance status as historical data indicates non-compliance for some variants. Ensure the supplier provides traceability documentation required for high-reliability sectors. Cross-reference the manufacturer's latest datasheet for any updates on lead times or packaging changes before finalizing orders.

Selection Notes

Select this component when precise voltage regulation is required under significant thermal fluctuations. The DO-35 package suits through-hole mounting constraints. Consider the 400 Ohm Zener impedance for noise-sensitive designs. Verify that the 0.5W power rating aligns with the expected current draw in the target circuit to ensure safe operation within the specified temperature limits.

Part Context

This part belongs to Microchip's legacy single Zener diode lineup, originally developed by Microsemi. It serves as a specialized variant within the broader 1N48xx series, distinguished by its temperature compensation feature rather than standard regulation alone. The component maintains compatibility with traditional axial leaded form factors used in established industrial and defense electronics architectures.

Replacement Considerations

Direct substitutes include other temperature-compensated Zener diodes with matching 12.8V ratings and DO-35 packages. Verify pinout compatibility and hermetic sealing requirements when evaluating alternatives from other manufacturers. Ensure equivalent Zener impedance and power dissipation capabilities are met to maintain circuit performance integrity.