1N4758AUR

Overview

The Microchip Technology 1N4758AUR is a silicon unidirectional Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 56 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 500 mW and operates within a temperature range of -65°C to +175°C. Packaged in the SOD-323 (DO-213AA) surface-mount format, it exhibits a maximum dynamic impedance of 110 Ohms and a reverse leakage current of 5 µA at 42.6 V.

Feature Summary

• Provides stable voltage regulation using a 56 V Zener breakdown characteristic.
• Constructed with silicon planar technology for reliable performance.
• Encapsulated in a compact surface-mount package suitable for automated assembly.

Applications

• Voltage reference circuits
• Over-voltage protection stages
• Clipping and waveform shaping

Procurement Notes

Verify the specific suffix 'UR' against the manufacturer's official datasheet to confirm the exact tape-and-reel packaging configuration and marking codes. Ensure the selected variant matches the required thermal management capabilities for the intended operating environment. Cross-reference the part number with authorized distributors to confirm current availability status and compliance certifications such as RoHS or REACH before finalizing procurement plans.

Selection Notes

Select this component when a 56 V regulation point is required in a space-constrained surface-mount design. The 500 mW power rating dictates the maximum allowable current and thermal dissipation limits. Compare the 110 Ohm dynamic impedance against circuit sensitivity requirements to ensure adequate regulation stability under varying load conditions.

Part Context

This component belongs to the standard Zener diode family utilized for basic voltage control functions. It serves as a fundamental passive semiconductor element in electronic schematics. The DO-213AA package represents a common industry-standard footprint for low-power surface-mount diodes, facilitating integration into various printed circuit board layouts.

Replacement Considerations

Direct substitutes include the 1N4758A-G from Panjit International and the 1N4758A from Continental Device India Limited. These alternatives share identical electrical specifications and the DO-41 axial package form factor, though physical mounting differences must be accounted for during retrofitting.

FAQ

What is the maximum operating junction temperature for the 1N4758AUR?

The maximum operating junction temperature is specified as 200°C, while the storage temperature range extends from -65°C to +200°C.

Does the 1N4758AUR support bidirectional operation?

No, the device is classified as a unidirectional Zener diode, meaning it is designed to regulate voltage in a single polarity direction.