1N4925A/TR

Overview

The 1N4925A/TR is a temperature compensated Zener reference diode manufactured by Microchip Technology. It features a nominal Zener voltage of 12.8 V with a tolerance of ±5%. The device operates in the DO-7-2 (DO-35) axial through-hole package and dissipates up to 400 mW. Key electrical parameters include a maximum reverse leakage current of 15 µA, a test current of 7.5 mA, and a Zener impedance of 25 Ohms. It maintains functionality across an extended temperature range from -65°C to +175°C.

Feature Summary

• Temperature compensated design for stable voltage reference performance
• High reliability construction suitable for demanding environments
• Low noise characteristics for precision applications

Applications

• Precision voltage reference circuits
• Temperature compensated regulation systems
• High-reliability aerospace and defense electronics

Procurement Notes

Verify the specific suffix configuration against official Microchip documentation to ensure compatibility with required screening levels or plating options. Confirm that the reel packaging aligns with automated assembly requirements. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and traceability before finalizing procurement orders.

Selection Notes

Select this component when a stable, low-noise voltage reference is required over a wide temperature range. The 12.8 V nominal value and 400 mW power rating suit moderate current applications. Ensure the DO-7-2 package fits the board layout constraints. Verify that the 25 Ohm impedance meets the circuit's dynamic response specifications.

Part Context

This part belongs to the 1N49xxA series of temperature compensated Zener diodes produced by Microchip Technology. These devices are engineered to provide superior voltage stability compared to standard Zener diodes, particularly in varying thermal conditions. The series is widely utilized in high-reliability sectors where consistent reference voltages are critical for system accuracy.

Replacement Considerations

Direct substitutes within the same family include 1N4912A/TR and 1N4913/TR, which share identical 12.8 V specifications and package types. Verify that any alternative component matches the 400 mW power dissipation and 25 Ohm impedance limits to maintain circuit performance integrity.