1N4743PE3/TR8

Overview

The Microchip Technology 1N4743PE3/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial-lead package. It provides voltage regulation with a nominal Zener voltage of 13 V and a standard tolerance of ±10%. The device operates within a temperature range of -65°C to +150°C and features a maximum reverse current of 5 µA at a test voltage of 9.1 V. Electrical characteristics include a dynamic impedance of 10 Ω at a test current of 19 mA and a maximum forward voltage of 1.2 V at 200 mA.

Feature Summary

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

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in power supply systems
• Clamping applications for transient voltage suppression

Procurement Notes

Verify that the ordering suffix TR8 corresponds to tape and reel packaging as specified by EIA-296 standards. Confirm RoHS compliance status via the e3 suffix designation. Ensure the component matches the specific JEDEC type number requirements for your circuit design. Check for any military screening prefixes if higher reliability levels are required.

Selection Notes

Select this component when a 13 V regulation point is needed with ±10% tolerance. Consider the 1.0 W power dissipation rating and thermal resistance values for heat management. Compare against glass-body options if lower thermal resistance is not critical. Verify lead length requirements for PCB layout compatibility.

Part Context

This part belongs to the widely used 1N4728A through 1N4764A series of 1.0 watt Zener diodes. The series offers extensive voltage selection from 3.3 to 100 volts. The plastic encapsulated version provides lower thermal resistance compared to glass-body alternatives. These devices are JEDEC registered and available in various screening levels.

Replacement Considerations

Equivalent parts include 1N4743A or 1N4743AP for standard specifications. Surface mount equivalents such as SMAJ4743A or MLL4743A are available. Verify voltage tolerance and power dissipation ratings match before substitution.