1N4746PE3/TR12

Overview

The Microchip Technology 1N4746PE3/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 axial lead package. It provides voltage regulation at a nominal Zener voltage of 18 V with 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 on its terminals.

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 a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards
• Non-sensitive to electrostatic discharge (ESD) per MIL-STD-750 Method 1020

Applications

• Voltage regulation circuits requiring 18 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 packaging configuration, as the TR designation indicates tape and reel availability. Confirm compliance requirements such as RoHS status and specific screening levels if applicable to your design. Ensure the component meets the thermal resistance and power dissipation limits defined in the datasheet for your intended operating environment.

Selection Notes

Select this component when an 18 V Zener voltage with ±5% tolerance is required in a plastic axial package. Consider the 1.0 W power dissipation capability and the -65°C to +150°C operating temperature range. Verify that the DO-41 package dimensions fit your PCB layout and that the tape and reel packaging aligns with your assembly process.

Part Context

This part belongs to the Microsemi Scottsdale Division 1N4728AP through 1N4764AP series of silicon Zener diodes. The series offers extensive voltage selection from 3.3 to 100 V in plastic encapsulated packages. These devices are JEDEC registered and provide lower thermal resistance compared to glass-body options, making them suitable for various industrial and commercial applications.

Replacement Considerations

Consult the manufacturer's documentation for direct substitutes within the same series or equivalent parts from other manufacturers. Ensure any replacement maintains the 18 V Zener voltage, ±5% tolerance, 1.0 W power rating, and DO-41 package compatibility.