1N4748AE3/TR13

Overview

The Microchip Technology 1N4748AE3/TR13 is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 22 V with a tolerance of 5%. The device has a power dissipation rating of 1 W and operates within a temperature range of -65 °C to +175 °C. Key electrical parameters include a maximum reverse leakage current of 100 nA, a Zener impedance of 23 Ohms at a test current of 11.5 mA, and a forward voltage of 1.2 V at 200 mA. It utilizes an axial DO-41 package and is supplied in a reel format.

Feature Summary

• Provides stable voltage regulation using a single unidirectional Zener junction.
• Capable of operation across an extended industrial temperature range up to 175 °C.
• Constructed with a silicon planar structure housed in a standard axial leaded package.

Applications

• General-purpose voltage reference circuits
• Overvoltage protection for low-power electronics
• Biasing networks in analog signal processing

Procurement Notes

Verify the specific suffix 'E3' confirms RoHS compliance and lead-free termination status directly from the manufacturer's datasheet or official product change notifications. Confirm that the 'TR13' designation matches the required tape and reel packaging specifications for your automated assembly equipment. Ensure the component meets all environmental and material declarations required for your final system integration.

Selection Notes

Select this component when a precise 22 V regulation point is required with tight 5% tolerance. The high maximum operating temperature of 175 °C makes it suitable for harsh environments where standard commercial grade parts may fail. The 1 W power rating allows for moderate current handling in compact axial packages compared to higher power surface mount alternatives.

Part Context

This part belongs to the standard 1N47xx series of Zener diodes manufactured by Microchip Technology. It serves as a direct replacement for legacy components originally defined by JEDEC standards. The 'E3' suffix indicates environmental compliance, while 'TR13' specifies the reel quantity and packaging method used for bulk distribution.

Replacement Considerations

Direct equivalents include the 1N4748A from other manufacturers such as Panjit, provided the package and electrical tolerances match. Verify that substitute parts maintain the same 1 W power dissipation and axial DO-41 footprint to ensure mechanical compatibility without circuit redesign.