1N4744AUR

Overview

The Microchip Technology 1N4744AUR is a surface-mount Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 15 V with a tolerance of 5%. The device operates within a power dissipation rating of 1 W and utilizes the DO-213AB (MELF) glass package. Electrical characteristics include a maximum reverse leakage current of 5 uA, a Zener impedance of 14 Ohms, and a test current of 17 mA. It supports a forward current of 200 mA with a forward voltage of 1.2 V. The component is rated for an operating temperature range from -65 C to +175 C.

Feature Summary

• Hermetically sealed glass MELF construction for high reliability
• Surface mount DO-213AB package design
• Wide thermal operating range capability

Applications

• High density circuit board voltage regulation
• Low parasitic requirement circuits
• Applications requiring source control drawing compliance

Procurement Notes

Verify the specific suffix UR against the manufacturer's datasheet to confirm lead-free status and hermetic sealing requirements. Ensure the DO-213AB footprint matches the PCB layout. Confirm RoHS compliance if required by the end product specifications. Cross-reference the part number with official Microchip documentation to validate electrical parameters before procurement.

Selection Notes

Select this component when a surface-mount Zener diode with hermetic sealing is required for high-reliability environments. The DO-213AB package is suitable for automated assembly processes. Consider the 1 W power dissipation and 15 V regulation point relative to circuit load requirements. Verify that the 175 C maximum junction temperature meets the thermal management design of the target application.

Part Context

This part belongs to the Microchip 1N47xxAUR series of surface-mount Zener diodes. These devices are electrically equivalent to the through-hole 1N47xxA registration in the DO-41 package but utilize the JEDEC-defined DO-213AB outline. The series is intended for applications demanding high density and low parasitic effects while maintaining the performance standards of the registered axial equivalents.

Replacement Considerations

Equivalent parts include the 1N4744A in the DO-41 through-hole package for non-surface-mount designs. Other surface-mount alternatives may exist within the same manufacturer's MELF lineup, provided they match the 15 V Zener voltage, 1 W power rating, and DO-213AB package dimensions.