1N4754AP/TR12

Overview

The 1N4754AP/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP-1N4764AP series, manufactured by Microsemi (Microchip Technology). It provides voltage regulation with a nominal Zener voltage of 39V and a standard tolerance of ±5%. The device features a plastic DO-41 (DO-204AL) axial-lead package with void-free transfer molded epoxy body. Electrical characteristics include a maximum dynamic impedance of 60 Ohms at a test current of 6.5 mA and a maximum reverse current of 5 µA. It operates within a temperature range of -65°C to +150°C.

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 39V reference
• Power supply protection and clamping applications
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify the specific manufacturer origin, as the part originates from Microsemi Scottsdale Division, now part of Microchip Technology. Confirm that the TR12 suffix indicates tape and reel packaging compliant with EIA-296 standards. Ensure the component meets the required RoHS status if applicable, noting that the base AP suffix denotes plastic construction while e3 indicates RoHS compliance.

Selection Notes

Select this component when a 39V Zener voltage with ±5% tolerance is required for power dissipation up to 1.0 watt. The plastic DO-41 package offers lower thermal resistance compared to glass-body options. Consider the surge current capability and dynamic impedance specifications for circuit stability. Verify lead length requirements for thermal resistance calculations during PCB layout.

Part Context

This component belongs to the JEDEC registered 1N4728A through 1N4764A series of 1.0-watt Zener diodes. The series covers a voltage selection from 3.3 to 100 volts. The 'P' suffix identifies the plastic encapsulated version, which provides improved thermal performance over glass equivalents. The 'TR' suffix designates the tape and reel packaging option for automated assembly.

Replacement Considerations

Surface mount equivalents are available as SMAJ4754A or MLL4754A. Glass-body versions exist under the same JEDEC number with a 'G' suffix. Military screening levels are accessible via MQ, MX, MV, or MSP prefixes.