1N4733CP/TR12

Overview

The Microchip Technology 1N4733CP/TR12 is a silicon 1.0-watt Zener diode in the 1N4728AP through 1N4764AP series, housed in a plastic DO-41 (DO-204AL) axial-lead package with a tape and reel configuration. It provides voltage regulation at a nominal Zener voltage of 5.1 V with a tight tolerance of ±2%, indicated by the 'C' suffix. The device operates within a temperature range of -65°C to +150°C and features a maximum dynamic impedance of 7 Ohms at a test current of 49 mA. It includes RoHS compliant options and offers flexible mounting terminals for circuit integration.

Feature Summary

• Provides precise voltage regulation with a tight ±2% tolerance on the nominal Zener voltage.
• Features a void-free transfer molded thermosetting epoxy body meeting UL94V-0 standards.
• Offers flexible axial-lead mounting terminals suitable for standard PCB assembly.
• Includes moisture classification as Level 1 per IPC/JEDEC J-STD-020B without requiring dry pack.

Applications

• Voltage regulation in power supply circuits
• Reference voltage sources in electronic systems
• Overvoltage protection components

Procurement Notes

Verify that the specific part number matches the required tolerance and packaging format. Confirm the manufacturer origin, as this series was originally associated with Microsemi before acquisition activities. Ensure the RoHS compliance status aligns with project requirements. Check for any specific military screening prefixes if higher reliability levels are needed. Validate the tape and reel specifications against automated placement equipment constraints.

Selection Notes

Select this component when a 5.1 V reference with high precision is required in an axial-lead form factor. The 1W power rating allows for robust operation in moderate current applications. Consider the thermal resistance characteristics for heat dissipation planning. Compare against glass-body variants if lower thermal resistance is not critical. Evaluate the surge current capabilities for transient protection needs.

Part Context

This component belongs to the popular 1N4728A through 1N4764A series of 1.0-watt Zener diodes. The series covers a wide voltage selection from 3.3 to 100 volts. The 'P' suffix denotes plastic construction, which provides lower thermal resistance compared to glass-body options. The 'TR' suffix indicates availability in tape and reel packaging for automated assembly processes.

Replacement Considerations

Equivalent parts include other 1N4733 variants with matching 5.1 V and ±2% tolerance specifications. Surface mount equivalents such as SMAJ4733A or MLL4733A are available for space-constrained designs. Verify pinout compatibility and thermal performance when substituting with different package types.