1N4734A

Overview

The Microsemi Corporation 1N4734A is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.6V with a standard tolerance of 5%. The device supports a power dissipation of 1W and operates within a wide temperature range, typically up to 175°C for hermetic glass versions or 150°C for plastic encapsulated variants. It is available in multiple package options including the DO-204AL axial leaded configuration and surface mount formats such as DO-213AB MELF. The component is unidirectional and utilizes a single junction structure.

Feature Summary

• Provides stable voltage regulation across broad operating current and temperature ranges
• Available in hermetically sealed glass bodies for high reliability requirements
• Offers lower thermal resistance in plastic molded configurations compared to glass equivalents

Applications

• Voltage regulation in high-density circuit designs
• Applications requiring low parasitic characteristics
• High reliability systems specified by source control drawings

Procurement Notes

Verify the specific suffix letters on the part number to confirm the exact package type, material composition, and compliance status. Suffixes indicate variations such as RoHS compliance, military screening levels, or specific tolerance grades. Ensure the selected variant matches the required thermal and mechanical constraints of the target application before procurement.

Selection Notes

Select the appropriate package based on the assembly method and environmental conditions. Choose glass-bodied versions for hermetic sealing needs and higher temperature ratings. Opt for plastic versions when lower thermal resistance is prioritized. Confirm that the 5% standard tolerance meets the circuit requirements, or select tighter tolerance variants if necessary.

Part Context

This component belongs to the 1N4728A through 1N4764A series of 1-watt Zener diodes manufactured by Microsemi. The series provides an extensive selection of voltages ranging from 3.3V to 100V. These devices are JEDEC registered and serve as industry-standard solutions for general-purpose voltage regulation tasks in various electronic systems.

Replacement Considerations

Surface mount equivalents include SMAJ4734A and MLL4734A. Plastic axial replacements may include 1N4734AP or 1N4734PE3. Glass axial replacements include 1N4734AG or MX1N4734CGE3.