1N4975US/TR

Single Zener Diodes Overview

The 1N4975US/TR is a single Zener diode manufactured by Microchip Technology, designed for surface-mount applications. It features a nominal Zener voltage of 51 V with a power dissipation rating of 5 W. The device operates within a temperature range of -65 °C to +175 °C and exhibits a voltage temperature coefficient of 0.095 %/°C. Key electrical characteristics include a maximum reverse leakage current of 2 µA, a Zener impedance of 27 Ohms, and a test current of 25 mA. The component utilizes an axial leaded package configuration despite the 'US' designation often implying SMD variants in other contexts, specifically identified here as having specific dimensional constraints.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation at a nominal 51 V potential for circuit protection and reference applications.
• Capable of handling high thermal loads with a 5 W power dissipation rating and extended operating temperature limits up to 175 °C.
• Features low reverse leakage current specifications to minimize standby power consumption and signal noise.

Single Zener Diodes Applications

• Voltage regulation in high-temperature industrial environments
• Overvoltage protection circuits requiring robust thermal performance
• Precision voltage reference sources in aerospace or military-grade electronics

Single Zener Diodes Procurement Notes

Verify the exact package type and manufacturer lot codes upon order confirmation, as historical data indicates variations between axial and surface-mount configurations for similar part numbers. Confirm RoHS compliance status directly with the supplier, as some listings indicate non-compliance. Ensure the specific suffix matches the required mechanical footprint for PCB integration, given potential discrepancies in legacy documentation.

Single Zener Diodes Selection Notes

Select this component when a 51 V regulation point is required alongside high thermal stability and low leakage characteristics. Compare against standard silicon alternatives if lower cost is prioritized over the extended temperature range. Ensure the circuit design accommodates the specified Zener impedance and test current conditions to maintain accuracy within the stated tolerance bands during operation.

Single Zener Diodes Part Context

This part belongs to the 1N497x series of Zener diodes produced by Microchip Technology (formerly Microsemi). The series is characterized by high-power capabilities and reliability suitable for demanding electronic environments. The 1N4975 variant specifically targets the 51 V segment of this lineup, offering consistent performance across wide temperature fluctuations typical in ruggedized equipment.

Single Zener Diodes Replacement Considerations

Direct substitutes may include JANTX1N4975 or JAN1N4975 from Microchip for equivalent electrical performance with potentially different qualification levels. Cross-brand replacements require verification of pin compatibility and thermal ratings.