1N4898A

Overview

The Microchip Technology 1N4898A is a temperature-compensated Zener diode designed for precision voltage regulation. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The device supports a maximum power dissipation of 400 mW and operates within an extended temperature range from -65 °C to +175 °C. Key electrical characteristics include a maximum reverse leakage current of 15 µA, a Zener impedance of 400 Ohms, and a voltage temperature coefficient of 0.001 %/°C. It is housed in a DO-7-2 through-hole package.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across wide thermal variations
• High reliability construction suitable for demanding industrial and military environments
• Precision voltage reference capability with tight tolerance specifications

Applications

• Precision voltage reference circuits requiring low temperature drift
• Overvoltage protection in sensitive electronic systems
• Voltage regulation in instrumentation and measurement equipment

Procurement Notes

Verify the specific suffix (e.g., /TR) against the required packaging format, as standard versions may differ from reel-packaged units. Confirm RoHS compliance status directly with the manufacturer or authorized distributor, as historical data indicates potential non-compliance for certain variants. Ensure the procurement channel is authorized to guarantee authenticity and traceability for this critical component.

Selection Notes

Select the 1N4898A when a stable 12.8 V reference is needed with minimal temperature dependence. The low voltage temperature coefficient makes it superior to standard Zener diodes for precision applications. Consider the DO-7 package constraints for board layout and ensure the operating current remains within the specified test conditions to maintain accuracy.

Part Context

This component belongs to the 1N4898 series of temperature-compensated Zener diodes manufactured by Microchip Technology. These devices are engineered to provide high stability and low noise performance. The series is commonly used in applications where standard Zener diodes exhibit unacceptable voltage drift due to temperature changes, offering a robust solution for analog signal conditioning.

Replacement Considerations

Public confirmed substitute part numbers: 1N4898A/TR.