1N4732P/TR12

Overview

The Microsemi Corporation 1N4732P/TR12 is a silicon 1.0-watt Zener diode in the JEDEC registered 1N4728A to 1N4764A series, housed in a plastic DO-41 (DO-204AL) axial lead package. It provides voltage regulation at a nominal 4.7 V with a standard tolerance of ±10%. The device features a maximum dynamic impedance of 8 Ohms at a test current of 53 mA and a maximum reverse leakage current of 10 µA at 1 V. It operates within a temperature range of -65°C to +150°C and includes a TR suffix indicating tape and reel packaging per EIA-296 standards.

Feature Summary

• Plastic encapsulated construction offering lower thermal resistance compared to glass-body options
• Moisture classification Level 1 requiring no dry pack
• Flexible axial-lead mounting terminals for through-hole installation

Applications

• Voltage regulation over broad operating current and temperature ranges
• General purpose electronic circuits utilizing standard Zener breakdown characteristics

Procurement Notes

Verify that the specific part number matches the required tolerance and packaging format. Confirm the manufacturer designation as Microsemi Corporation or its successor entities. Ensure the component meets the necessary environmental compliance requirements for the intended application, noting that RoHS compliant versions utilize an e3 suffix.

Selection Notes

Select this component when a 4.7 V regulation point is required with a 1 W power dissipation capability. Consider the plastic DO-41 package for applications needing lower thermal resistance than glass equivalents. Verify that the ±10% voltage tolerance aligns with circuit design specifications before integration.

Part Context

This component belongs to the widely used 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 specifically denotes the plastic molded epoxy body variant, which is distinct from the glass-body options available within the same JEDEC numbering system.

Replacement Considerations

Surface mount equivalents are available as SMAJ4732A and MLL4732A. Other manufacturers produce compatible parts under the base JEDEC number 1N4732, though electrical parameters and package dimensions should be verified against the original datasheet.