1N4752UR-1

Overview

The Microchip Technology 1N4752UR-1 is a high-reliability Zener diode designed for robust voltage regulation applications. It features a nominal Zener voltage of 33V with a tolerance of 5% and a power dissipation rating of 1W. The device utilizes silicon as the semiconductor material and is housed in a hermetically sealed DO-213AB MELF-2 glass package. This unidirectional component is compliant with RoHS standards and is engineered to operate reliably in demanding environments, offering isolated case connections and long-form packaging suitable for surface mount or specialized through-hole integration.

Feature Summary

• Hermetically sealed glass construction ensures environmental protection and long-term stability
• High reliability design meets stringent aerospace and military quality standards
• Unidirectional configuration provides precise voltage clamping and regulation
• Silicon-based element offers consistent electrical performance across operating ranges

Applications

• Aerospace and defense electronic systems requiring radiation-hardened components
• Military-grade power supply voltage reference circuits
• High-reliability industrial control system protection
• Critical infrastructure backup power regulation modules

Procurement Notes

Verify that the specific ordering suffix matches the required hermetic seal and lead finish specifications. Confirm compliance with current export control classifications and ensure the supplier provides traceability documentation for high-reliability requirements. Check for any specific handling instructions related to the glass MELF package integrity during assembly processes.

Selection Notes

Select this component when hermetic sealing and high reliability are mandatory for the application environment. Ensure the circuit design accommodates the 1W power dissipation limit at elevated temperatures. Verify that the DO-213AB footprint aligns with the PCB layout constraints and that the 33V breakdown voltage matches the target regulation point without exceeding maximum ratings.

Part Context

This part belongs to the 1N47xx series of Zener diodes manufactured by Microchip Technology, formerly Microsemi. The UR-1 suffix typically denotes a specific high-reliability variant within the broader family of voltage regulator diodes. These components are distinguished from standard commercial parts by their enhanced manufacturing controls and hermetic packaging options.

Replacement Considerations

Direct substitutes include other hermetically sealed 33V 1W Zener diodes in the DO-213AB package from qualified high-reliability manufacturers. Verify pinout compatibility and thermal characteristics before substitution. Generic non-hermetic equivalents may not meet the same environmental durability standards.