1N4744P/TR8

Overview

The Microchip Technology 1N4744P/TR8 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 with a TR suffix indicating tape and reel packaging. It provides voltage regulation at a nominal Zener voltage of 15 V with a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 14 Ohms at a test current of 17 mA. It includes flexible mounting terminals and void-free transfer molded epoxy body construction.

Feature Summary

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

Applications

• Voltage regulation circuits requiring 15 V reference
• Power supply protection and clamping applications
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify that the specific part number matches the required electrical characteristics, particularly the 15 V Zener voltage and ±5% tolerance. Confirm the presence of the 'TR' suffix to ensure the component is supplied in tape and reel packaging rather than bulk or individual units. Check manufacturer documentation for any updates regarding RoHS compliance status or material composition changes.

Selection Notes

Select this component when a 1 W power dissipation rating and a 15 V regulated output are required. The plastic encapsulation offers lower thermal resistance compared to glass-body options. Ensure the application environment supports the specified operating temperature range and that the axial lead format fits the target PCB layout constraints.

Part Context

This component belongs to the widely used 1N4728A through 1N4764A series of 1.0 watt Zener diodes registered by JEDEC. The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix designates plastic construction, distinguishing it from glass-body variants, while the 'TR' suffix indicates the specific tape and reel packaging method for automated assembly.

Replacement Considerations

Compatible substitutes include other 1N4744 variants such as 1N4744A or 1N4744G, provided the package type and tolerance requirements align. Surface mount equivalents like SMAJ4744A or MLL4744A may be considered if footprint conversion is feasible.