1N4744AP/TR12

Overview

The Microchip Technology 1N4744AP/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 15 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a maximum forward voltage of 1.2 V at 200 mA. Electrical characteristics include a test current of 17 mA, a maximum dynamic impedance of 14 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 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 1-watt power dissipation
• Power supply reference voltage generation
• Overvoltage protection stages in electronic systems

Procurement Notes

Verify that the ordering suffix TR12 corresponds to the tape and reel packaging option as defined by EIA-296 standards. Confirm the specific manufacturer origin, noting historical production by Microsemi Scottsdale Division and current availability under Microchip Technology. Ensure compliance requirements match the tin-lead or RoHS compliant terminal plating options available for this series.

Selection Notes

Select this component when a 15 V regulated output is required with a 5% tolerance. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the 1.0-watt power dissipation capability and the -65°C to +150°C operating temperature range for environmental suitability. Verify that the axial lead configuration fits the target PCB layout constraints.

Part Context

This part belongs to the JEDEC registered 1N4728A through 1N4764A series of silicon Zener diodes. The 'P' suffix designates the plastic encapsulated construction, while the 'A' suffix indicates the standard 5% voltage tolerance. The series covers a wide voltage selection from 3.3 to 100 volts, serving as a standard solution for general-purpose voltage regulation tasks.

Replacement Considerations

Surface mount equivalents are available as SMAJ4744A and MLL4744A. Glass-body versions exist with a 'G' suffix but exhibit higher thermal resistance. Military screening levels are accessible via MQ, MX, MV, or MSP prefixes.