1N4743APE3/TR8

Overview

The Microchip Technology 1N4743APE3/TR8 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, featuring a nominal voltage of 13 V with a standard tolerance of ±5%. It utilizes a plastic DO-41 (DO-204AL) axial-lead package and operates within a temperature range of -65°C to +150°C. The device provides voltage regulation over a broad operating current and temperature range, with a maximum dynamic impedance of 10 Ohms at a test current of 19 mA. It includes RoHS compliance via the 'e3' suffix and tape-and-reel packaging indicated by the 'TR' suffix.

Feature Summary

• Provides stable voltage regulation across a wide operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Constructed with a void-free transfer molded thermosetting epoxy body

Applications

• Voltage regulation circuits
• Power supply protection
• Reference voltage generation

Procurement Notes

Verify that the ordering suffix 'e3' confirms RoHS compliant annealed matte-Tin plating and that 'TR' indicates tape-and-reel packaging per EIA-296 standards. Confirm the manufacturer designation aligns with Microsemi Scottsdale Division specifications or authorized Microchip Technology equivalents. Ensure the component meets Level 1 moisture classification requirements without dry pack constraints.

Selection Notes

Select this component when a 13 V reference with 5% tolerance is required in a 1 W power dissipation class. Consider the thermal resistance of 45 °C/W junction-to-lead for lead-mounted applications or 105 °C/W junction-to-ambient for FR4 PCB mounting. Verify compatibility with existing JEDEC registered part numbers if replacing legacy glass-body options.

Part Context

This device belongs to the popular 1N4728A through 1N4764A series of 1.0 watt Zener diodes. The series offers an extensive voltage selection from 3.3 to 100 volts. The specific model utilizes plastic encapsulation, which provides lower thermal resistance compared to glass-body options while maintaining standard voltage tolerances.

Replacement Considerations

JEDEC registered equivalents include the 1N4743A. Plastic construction variants are designated with a P suffix, such as 1N4743AP. Surface mount equivalents like SMAJ4743A may be considered if form factor changes are acceptable.