1N4733P/TR12

Overview

The Microchip Technology 1N4733P/TR12 is a silicon 1-watt Zener diode in the 1N4728AP through 1N4764AP series. It provides voltage regulation with a nominal Zener voltage of 5.1 V and a standard tolerance of ±5%. The device operates within a temperature range of -65°C to +150°C and features a plastic encapsulated body (DO-41 or DO-204AL). Electrical characteristics include a maximum dynamic impedance of 7 Ohms at a test current of 49 mA, a maximum reverse current of 10 µA, and a forward voltage of 1.2 V at 200 mA. The component is supplied in tape and reel packaging.

Feature Summary

• Plastic molded epoxy body offering lower thermal resistance compared to glass-body options
• Moisture classification Level 1 per IPC/JEDEC J-STD-020B requiring no dry pack
• Flexible axial-lead mounting terminals for standard installation
• Non-sensitive to electrostatic discharge per MIL-STD-750 Method 1020

Applications

• Voltage regulation over broad operating current and temperature ranges
• General purpose power Zener applications
• Circuit protection and reference voltage generation

Procurement Notes

Verify that the ordering suffix 'TR' confirms tape and reel packaging as specified in the datasheet. Confirm the 'P' suffix indicates the plastic construction variant. Ensure the manufacturer designation aligns with the source document provided by Microsemi Scottsdale Division. Cross-reference the specific part number against official component databases to validate all electrical parameters before procurement.

Selection Notes

Select this component when a 1-watt power rating and 5.1 V regulation are required. The plastic package offers distinct thermal advantages over glass alternatives. Verify that the ±5% voltage tolerance meets circuit requirements. Consider the axial lead configuration for board space constraints. Ensure the operating environment stays within the specified -65°C to +150°C temperature limits.

Part Context

This device belongs to the JEDEC registered 1N4728A through 1N4764A series of silicon Zener diodes. 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. These devices are available in various screening levels and RoHS compliant configurations.

Replacement Considerations

Surface mount equivalents such as SMAJ4733A and MLL4733A are available. Consult the factory for other surface mount options. Glass body versions exist but offer higher thermal resistance. Verify pinout compatibility and thermal management requirements when substituting.