1N4739PE3/TR12

Overview

The Microchip Technology 1N4739PE3/TR12 is a silicon Zener diode with a nominal voltage of 9.1 V and a 5% tolerance, housed in a DO-41 axial package. It dissipates 1 W at 25°C and operates from -65°C to +150°C. Electrical characteristics include a test current of 28 mA, maximum reverse current of 10 µA, dynamic impedance of 5 Ohms, and surge current of 700 mA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole applications
• Constructed with void-free transfer molded thermosetting epoxy meeting UL94V-0 standards

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage generation

Procurement Notes

Verify the exact part number against official manufacturer documentation before procurement. Confirm that the 'e3' suffix indicates RoHS compliance and the 'TR12' suffix specifies tape and reel packaging. Ensure the component meets all required electrical tolerances and thermal ratings for your specific application environment.

Selection Notes

Select this component when a 9.1 V Zener voltage with 5% tolerance is required in a plastic axial package. The 1 W power dissipation rating supports steady-state operation up to 105°C lead temperature. Verify compatibility with existing circuit designs regarding test current and dynamic impedance specifications.

Part Context

This device belongs to the 1N4728AP thru 1N4764AP series of 1.0 watt Zener diodes manufactured by Microsemi (now Microchip Technology). The series offers extensive voltage selection from 3.3 to 100 volts. The 'P' suffix denotes plastic construction, which provides lower thermal resistance compared to glass-body options.

Replacement Considerations

Surface mount equivalents are available as SMAJ4739A or MLL4739A. Consult the factory for other surface mount options or military screening levels requiring JAN, JANTX, JANTXV, or JANS prefixes.