1N4745P/TR12

Overview

The Microchip Technology 1N4745P/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 with a TR suffix indicating tape and reel packaging. It provides voltage regulation at a nominal Zener voltage of 16 V with a standard 5% tolerance. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 16 Ohms at a test current of 15.5 mA. Maximum reverse current is specified at 57 µA.

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 meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 1-watt power dissipation
• Temperature compensated reference applications
• Protection against overvoltage transients in electronic systems

Procurement Notes

Verify that the specific ordering suffix matches the required package type and moisture classification level. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Ensure the supplier documentation aligns with the JEDEC registered data sheet specifications for electrical characteristics and thermal resistance parameters.

Selection Notes

Select this component when a 16 V regulated reference is needed with a 5% tolerance. The plastic construction offers lower thermal resistance compared to glass-body options. Verify that the application environment stays within the -65°C to +150°C operating range and that the 1.0-watt power dissipation limit is not exceeded under steady-state conditions.

Part Context

This part belongs to the 1N4728AP through 1N4764AP series of silicon Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix designates the plastic encapsulated version, while the 'TR' suffix indicates tape and reel packaging suitable for automated assembly processes.

Replacement Considerations

Equivalent parts include other 1N4745 variants such as 1N4745G or 1N4745AE3. Verify that substitute components match the 16 V nominal voltage, 1-watt power rating, and DO-41 package dimensions to ensure mechanical and electrical compatibility.