1N4750AUR/TR

Overview

The Microchip Technology 1N4750AUR/TR is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 27 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within an extended temperature range from -65 °C to +175 °C. Packaged in the DO-213AB (MELF) glass encapsulation, it utilizes surface-mount technology for automated assembly. Key electrical characteristics include a maximum reverse leakage current of 100 nA and a Zener impedance of 35 Ohms at the test current of 9.5 mA.

Feature Summary

• Provides stable voltage regulation through controlled Zener breakdown characteristics in the reverse bias region.
• Utilizes hermetically sealed glass MELF packaging to ensure environmental protection and reliability.
• Supports high-temperature operation suitable for demanding industrial and military environments.

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in sensitive electronic systems
• Clamping applications in signal processing paths

Procurement Notes

Verify the specific suffix UR/TR against official Microchip documentation to confirm the tape-and-reel packaging configuration and manufacturing origin. Ensure compatibility with standard MELF footprints during PCB layout. Confirm RoHS compliance status and lead times directly with authorized distributors, as availability may vary by region and production cycle.

Selection Notes

Select this component when a 27 V regulation point is required in a compact surface-mount form factor. The DO-213AB package offers a smaller footprint compared to axial leads while maintaining 1 W power handling. Consider the thermal derating requirements for operation above ambient temperatures to ensure the junction temperature remains within safe limits.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology. The series provides various voltage options in both axial and MELF packages. The 1N4750 variant specifically targets the 27 V market segment, offering consistency with legacy specifications while utilizing modern surface-mount manufacturing processes for improved integration flexibility.

Replacement Considerations

Cross-reference with other manufacturers' 1N4750 equivalents such as those from ON Semiconductor or Vishay. Verify that substitute parts match the 27 V nominal voltage, 1 W power rating, and DO-213AB mechanical dimensions to ensure direct fit without circuit modification.