1N4728AGE3

Overview

The Microchip Technology 1N4728AGE3 is a silicon unidirectional Zener voltage regulator diode rated at 1 W. It features a nominal Zener voltage of 3.3 V with a 5% tolerance and is housed in a DO-41 glass package. The device exhibits a maximum knee impedance of 400 Ω and a reverse leakage current of 100 µA. It supports a forward current of 200 mA and operates within a junction temperature range up to 170 °C, with storage capabilities extending from -65 °C to +175 °C.

Feature Summary

• Provides stable voltage regulation using oxide passivated die construction
• Features metallurgically bonded double slug type hermetically sealed glass case
• Designed for high power rating applications in stabilizing and clipping circuits

Applications

• Voltage stabilization circuits
• Signal clipping applications
• High power rating reference circuits

Procurement Notes

Verify component authenticity through authorized Microchip Technology channels or certified distributors. Confirm the presence of the RoHS-compliant suffix (E3) and ensure the DO-41 package matches design requirements. Validate datasheet revisions against specific project timelines to account for potential manufacturing changes or obsolescence status updates.

Selection Notes

Select this component when a precise 3.3 V reference with tight 5% tolerance is required in a standard axial leaded package. Ensure the circuit can accommodate the specified 1 W power dissipation limit at ambient temperatures. Verify that the DO-41 glass construction meets environmental sealing needs compared to plastic alternatives.

Part Context

This part belongs to the 1N4728A series of one-watt silicon Zener diodes manufactured by Microchip Technology. The series covers a wide voltage range from 3.3 V to 100 V, utilizing a consistent DO-41 glass package. The 1N4728AGE3 specifically denotes the 3.3 V variant with enhanced compliance markings.

Replacement Considerations

Public confirmed substitutes include the 1N4728A and MQ1N4728P. Verify pinout compatibility and thermal characteristics before substitution.