1N4743AP/TR12

Overview

The Microchip Technology 1N4743AP/TR12 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 ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum power dissipation of 1.0 watts at 25°C. Electrical characteristics include a test current of 19 mA, a maximum dynamic impedance of 10 Ohms, and a maximum reverse current of 5 µA.

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 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 13 V 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 tape and reel packaging option as defined by EIA-296 standards. Confirm RoHS compliance status if required, noting that devices with an e3 suffix are explicitly RoHS compliant. Ensure the specific manufacturer source aligns with the requested component specifications before finalizing procurement orders.

Selection Notes

Select this component when a 13 V Zener voltage with 5% tolerance is required in a 1-watt axial package. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the -65°C to +150°C operating range for environmental suitability. Verify that the 10 Ohm dynamic impedance meets circuit stability requirements.

Part Context

This part belongs to the JEDEC registered 1N4728A to 1N4764A series of 1.0-watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix designates plastic construction, while the 'TR' suffix indicates tape and reel packaging availability. These devices are manufactured by Microsemi, now part of Microchip Technology.

Replacement Considerations

Surface mount equivalents are available as SMAJ4743A or MLL4743A. Glass-body versions exist under the same JEDEC numbering but utilize different packaging materials.