1N4931A/TR

Overview

The Microchip Technology 1N4931A/TR is a temperature-compensated Zener diode designed for precision voltage regulation applications. It features a nominal Zener voltage of 19.2 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 500 mW and exhibits a dynamic impedance of 36 Ohms. It operates within a junction temperature range of -55°C to 100°C. The component is housed in an axial DO-35 (DO-204AH) package and is supplied in Tape & Reel (TR) packaging format.

Feature Summary

• Temperature compensated design ensures stable voltage regulation across varying thermal conditions
• Precision voltage reference capability with tight tolerance specifications
• Robust axial through-hole construction suitable for standard PCB mounting

Applications

• Precision voltage reference circuits requiring thermal stability
• Overvoltage protection stages in sensitive electronic systems
• Voltage regulator biasing networks

Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging configuration when ordering. Confirm RoHS compliance status aligns with project requirements. Ensure the DO-35 axial package dimensions match the target PCB footprint. Cross-reference the manufacturer part number with official Microchip documentation to validate the temperature compensation characteristics and electrical tolerances before final procurement.

Selection Notes

Select this component when a stable 19.2 V reference is required under fluctuating thermal environments. The temperature compensation feature distinguishes it from standard Zener diodes, making it suitable for high-precision analog applications. Consider the 500 mW power rating and axial package constraints during circuit layout planning. Verify that the ±5% voltage tolerance meets the system's accuracy requirements.

Part Context

This component belongs to the 1N4931 series of temperature-compensated Zener diodes manufactured by Microchip Technology. The series is engineered to provide improved thermal stability compared to conventional Zener devices. The 'A' designation typically denotes specific voltage tolerance grades, while the '/TR' suffix specifies the bulk tape and reel shipping method for automated assembly processes.

Replacement Considerations

Direct substitutes must match the 19.2 V nominal voltage, 500 mW power rating, and temperature-compensated characteristic. Verify package compatibility with DO-35/DO-204AH axial form factors. Check equivalent dynamic impedance and tolerance specifications to ensure circuit performance parity.