1N4745E3/TR13

Overview

The Microchip Technology 1N4745E3/TR13 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 at a nominal Zener voltage of 16 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features RoHS-compliant annealed matte-tin plating. The 'TR' suffix indicates tape and reel packaging per EIA-296 standards.

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 a void-free transfer molded thermosetting epoxy body meeting UL94V-0 flammability ratings
• Non-sensitive to electrostatic discharge as verified by MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 16 V reference
• Power supply protection and clamping applications
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the ordering suffix matches the required specifications: 'e3' denotes RoHS compliance, while 'TR' specifies tape and reel packaging. Confirm the manufacturer designation, as this component originates from the Microsemi Scottsdale Division, now part of Microchip Technology. Ensure the procurement documentation aligns with the JEDEC registered type number 1N4745A characteristics.

Selection Notes

Select this component when a 16 V Zener voltage with 5% tolerance is required in a plastic axial package. The 1.0 W power dissipation rating supports steady-state operation at lead temperatures below 105°C or ambient temperatures below 45°C on FR4 boards. Consider the thermal resistance of 45°C/W junction-to-lead for heat management in dense assemblies.

Part Context

This part belongs to the popular 1N4728AP through 1N4764AP series of 1.0 watt Zener diodes. The series offers an extensive voltage selection from 3.3 to 100 volts. The plastic encapsulated version provides lower thermal resistance compared to glass-body options for the same JEDEC part numbers.

Replacement Considerations

Surface mount equivalents are available as SMAJ4745A or MLL4745A. For military screening levels, prefixes such as MQ, MX, MV, or MSP can be added to JAN, JANTX, JANTXV, and JANS variants respectively.