1N4744PE3/TR12

Overview

The Microchip Technology 1N4744PE3/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 RoHS-compliant annealed matte-tin plating. Electrical characteristics include a maximum dynamic impedance of 14 Ohms at a test current of 17 mA, a maximum reverse current of 5 µA at 11.4 V, and a forward voltage of 1.2 V maximum at 200 mA.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for standard through-hole applications
• Constructed with 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 15 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. The 'P' indicates plastic construction, 'e3' denotes RoHS compliance with tin plating, and 'TR12' specifies tape and reel packaging. Confirm the manufacturer source, as this part number falls under the Microsemi Scottsdale Division product line now associated with Microchip Technology. Ensure the component meets the specific JEDEC registration requirements for the 1N4744A series.

Selection Notes

Select this component when a 15 V Zener voltage with 5% tolerance is required in a 1-watt power dissipation class. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the operating temperature range of -65°C to +150°C for environmental suitability. Verify that the maximum reverse current and dynamic impedance parameters align with the circuit's leakage and stability requirements.

Part Context

This device belongs to the popular 1N4728AP through 1N4764AP series of silicon Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 1N4744A variant specifically targets the 15 V regulation point within this extensive lineup. These devices are JEDEC registered and available in various screening levels and packaging options to meet diverse industrial and commercial needs.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4744A or 1N4744AP equivalents in the DO-41 package. Ensure replacement parts maintain the 15 V nominal voltage, 5% tolerance, and 1 W power rating. Verify that any alternative also supports the required operating temperature range and RoHS compliance if mandated by the design.