1N4732P/TR8

Overview

The Microsemi Corporation 1N4732P/TR8 is a silicon 1-watt Zener diode in the 1N4728AP-1N4764AP series, housed in a plastic DO-204AL (DO-41) axial-lead package. It provides voltage regulation with a nominal Zener voltage of 4.7 V and a standard tolerance of ±10%. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 8 Ohms at a test current of 53 mA. It includes a tape and reel option indicated by the TR suffix.

Feature Summary

• Provides voltage regulation across a broad operating current and temperature range
• Features flexible axial-lead mounting terminals for through-hole installation
• 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 4.7 V reference
• Power supply protection and clamping applications
• General-purpose electronic equipment utilizing axial-lead components

Procurement Notes

Verify component authenticity against official Microsemi documentation due to end-of-life status. Confirm that the specific ordering suffix matches required packaging and tolerance specifications. Ensure compatibility with existing thermal management designs given the 1 W power dissipation rating. Check for RoHS compliance requirements as standard versions may not meet current environmental directives.

Selection Notes

Select this component when a 4.7 V Zener diode with ±10% tolerance is required in a plastic DO-204AL package. Consider the lower thermal resistance of the plastic body compared to glass options. Evaluate the need for tape and reel packaging if automated assembly is utilized. Verify that the operating temperature range meets system environmental constraints.

Part Context

This part belongs to the widely used 1N4728A through 1N4764A series of 1.0 watt Zener diodes. The series offers extensive voltage selection from 3.3 to 100 volts. The 'P' suffix specifically designates the plastic encapsulated construction, which provides lower thermal resistance compared to the glass-body variants of the same JEDEC part numbers.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4732A or 1N4732P equivalents in the DO-41 package. For hermetic sealing requirements, consider MQ1N4732GTR or MSP1N4732CUR variants. Surface mount alternatives such as SMAJ4732A are available but require layout changes.