1N4898/TR

Overview

The Microchip Technology 1N4898/TR is a temperature-compensated Zener diode designed for precision voltage reference applications. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The device operates in the DO-7 axial through-hole package and dissipates up to 400 mW. Key electrical parameters include a maximum reverse leakage current of 15 µA, a Zener impedance of 400 Ohms at a test current of 500 µA, and a voltage temperature coefficient of 0.001 %/°C. It supports 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 low temperature drift
• Industrial control systems operating under extreme temperature conditions
• Test and measurement equipment needing stable reference voltages

Procurement Notes

Verify the specific suffix /TR indicates reel packaging when ordering. Confirm RoHS status as non-compliant if required by your assembly standards. Ensure the DO-7 axial lead form factor matches your PCB layout constraints. Cross-reference the 12.8V Zener voltage and 400mW power rating against your circuit design requirements before finalizing procurement.

Selection Notes

Select this component when a stable 12.8V reference is needed with minimal temperature dependence. The DO-7 package suits through-hole designs. Consider the 400mW dissipation limit for thermal management. Verify compatibility with existing supply voltages and load currents. The high operating temperature range makes it suitable for harsh environments where standard diodes might fail.

Part Context

This part belongs to Microchip's legacy Zener diode lineup, often replacing older National Semiconductor or Fairchild equivalents. It is commonly used in instrumentation and aerospace applications where long-term stability is critical. The 1N4898 designation follows standard JEDEC numbering conventions for Zener diodes.

Replacement Considerations

Direct substitutes include the 1N4899A/TR which shares similar electrical characteristics. Verify pinout compatibility and thermal performance when swapping between these variants. Ensure the replacement maintains the required temperature compensation profile for your specific application.