1N4732AP/TR12

Overview

The Microsemi Corporation 1N4732AP/TR12 is a silicon 1-watt Zener diode in the 1N4728AP-1N4764AP series. It features a nominal Zener voltage of 4.7 V with a ±5% tolerance, indicated by the 'A' suffix. The device operates within a temperature range of -65°C to +150°C and utilizes a plastic DO-204AL (DO-41) axial lead package. Electrical characteristics include a maximum dynamic impedance of 8 Ohms at a test current of 53 mA and a maximum reverse leakage current of 1 µA at 1 V. The component is moisture classified as Level 1.

Feature Summary

• Provides 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

Applications

• Voltage regulation circuits
• Reference voltage sources
• Overvoltage protection

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm packaging and compliance status. The TR12 suffix indicates tape and reel packaging per EIA-296 standards. Confirm RoHS compliance requirements, as devices with the e3 suffix are compliant while others may not be. Ensure the procurement specification matches the required tolerance and screening level for the intended application.

Selection Notes

Select this component when a 4.7 V reference with 5% tolerance is required in a 1 W power rating. The plastic construction offers lower thermal resistance compared to glass-body options. Consider the axial lead format for manual assembly or standard PCB layouts. Verify that the operating environment stays within the specified -65°C to +150°C range and that surge current limits are respected.

Part Context

This part belongs to the widely used 1N47xx series of silicon Zener diodes manufactured by Microsemi's Scottsdale Division. The series covers voltages from 3.3 V to 100 V. The 'P' suffix designates the plastic encapsulated version, distinct from the glass-bodied 'G' suffix variants. These components are JEDEC registered and offer various military screening prefixes for high-reliability applications.

Replacement Considerations

Surface mount equivalents such as SMAJ4732A or MLL4732A are available from the same manufacturer family. Cross-brand replacements must match the 4.7 V nominal voltage, 1 W power dissipation, and DO-204AL footprint if physical compatibility is required.