1N4925/TR

Overview

The Microchip Technology 1N4925/TR is a temperature-compensated Zener reference diode housed in a DO-7 (DO-35) axial through-hole package. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device operates within a junction temperature range of -65°C to +175°C and dissipates up to 500 mW. Key electrical characteristics include a maximum reverse leakage current of 15 µA, a Zener impedance of 75 Ω at the test current of 2 mA, and a low voltage temperature coefficient of 0.005 %/°C.

Feature Summary

• Temperature compensated design for stable voltage reference performance across wide thermal ranges
• Low noise operation suitable for precision analog circuit applications
• High reliability construction supporting extended industrial and military temperature extremes

Applications

• Precision voltage reference sources in measurement instrumentation
• Temperature compensation circuits in sensor interfaces
• Reference elements in high-stability power supply regulation loops

Procurement Notes

Verify the specific suffix /TR indicates reel packaging configuration against the manufacturer's official documentation. Confirm RoHS compliance status as distributor listings may vary. Ensure the ordering quantity aligns with the manufacturer's minimum reel pack requirements. Cross-reference the part number with the latest datasheet revision to confirm pinout and mechanical dimensions match the target PCB footprint.

Selection Notes

Select this component when a stable 19.2 V reference is required with minimal drift over temperature. The low temperature coefficient distinguishes it from standard Zener diodes. Verify that the 500 mW power dissipation rating meets the thermal design constraints of the application environment. Ensure the axial leaded package fits the assembly process capabilities.

Part Context

This component belongs to the 1N49xx series of temperature-compensated Zener diodes manufactured by Microchip Technology. These devices are engineered to provide superior voltage stability compared to conventional Zener references. The series is widely utilized in applications demanding high accuracy and long-term reliability under varying thermal conditions.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.