1N4747APE3/TR12

Overview

The 1N4747APE3/TR12 is a silicon 1.0-watt Zener diode manufactured by Microchip Technology (formerly Microsemi). It provides voltage regulation at a nominal Zener voltage of 20V with a standard tolerance of plus or minus 5%. The device features a plastic encapsulated body in the DO-41 axial lead package and is RoHS compliant, indicated by the e3 suffix. It operates within a temperature range of -65°C to +150°C and includes a tape and reel option for automated assembly.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals suitable for through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 20V reference
• Power supply protection and clamping applications
• General purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix TR12 corresponds to the specific tape and reel packaging configuration required for your manufacturing line. Confirm the e3 suffix indicates RoHS compliance for environmental regulations. Ensure the component meets the necessary JEDEC registration standards for your specific application requirements before finalizing procurement.

Selection Notes

Select this component when a 20V Zener voltage with 5% tolerance is required in a 1-watt power dissipation class. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the maximum dynamic impedance and reverse current specifications to ensure compatibility with your circuit's sensitivity and leakage constraints.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of silicon 1-watt Zener diodes. The series covers a wide voltage selection from 3.3 to 100 volts. The 'A' suffix denotes a 5% voltage tolerance, while the 'P' suffix identifies the plastic construction variant. These devices are JEDEC registered and offer various screening levels and packaging options.

Replacement Considerations

Direct replacements include other 1N4747 variants such as 1N4747AG for glass body versions or 1N4747A for standard tolerances. Surface mount equivalents like SMAJ4747A are available if footprint changes are permissible. Verify that any substitute matches the 1W power rating and 20V Zener specification.