1N4739E3/TR13

Overview

The Microchip Technology 1N4739E3/TR13 is a silicon Zener diode designed for voltage regulation within the 1N4728AP through 1N4764AP series. It features a nominal Zener voltage of 9.1 V with a standard tolerance of 10%. The device operates in an axial DO-41 (DO-204AL) plastic package, offering a power dissipation rating of 1 W at 25°C and a maximum operating temperature of +150°C. Electrical characteristics include a test current of 28 mA, a dynamic impedance of 5 Ohms, and a reverse leakage current of 10 µA at 700 V. The component is RoHS compliant and supplied in tape and reel packaging.

Feature Summary

• Provides stable voltage regulation across a broad range of operating currents and temperatures.
• Features flexible axial-lead mounting terminals suitable for through-hole applications.
• Constructed with a void-free transfer molded thermosetting epoxy body that meets UL94V-0 standards.
• Non-sensitive to electrostatic discharge as verified by MIL-STD-750 Method 1020.

Applications

• Voltage regulation circuits requiring precise potential reference points.
• Overvoltage protection stages in electronic systems.
• Power supply output stabilization modules.

Procurement Notes

Verify the specific suffix configuration against official Microchip documentation to ensure correct tolerance and packaging specifications. Confirm RoHS compliance status and lead material plating details prior to integration. Ensure storage conditions align with Level 1 moisture sensitivity classification requirements to maintain component integrity during assembly processes.

Selection Notes

Select this component when a 9.1 V reference point is required with standard 10% tolerance. The 1 W power dissipation capability supports moderate current loads. Verify thermal management needs based on the specified junction-to-lead thermal resistance. Ensure the axial DO-41 footprint matches the target printed circuit board layout constraints.

Part Context

This part belongs to the widely recognized 1N47xx series of silicon Zener diodes manufactured by Microsemi, now part of Microchip Technology. The series offers extensive voltage selection from 3.3 V to 100 V. The 'e3' suffix indicates RoHS compliance, while 'TR13' denotes tape and reel packaging. These devices are JEDEC registered and available in various screening levels for specialized applications.

Replacement Considerations

Direct substitutes within the same series include other 1N47xx variants with different voltage ratings. Surface mount equivalents such as SMAJ4739A or MLL4739A are available for space-constrained designs. Cross-referencing with generic 1N4739 parts requires verification of dynamic impedance and thermal resistance parameters.