1N4728G

Overview

The Taiwan Semiconductor 1N4728G is a 3.3V, 1W silicon Zener diode housed in a DO-41 glass package. It features a ±5% voltage tolerance and operates within a junction temperature range of -65°C to +200°C. The device utilizes pure tin-plated leads for solderability and includes a cathode band for polarity indication.

Feature Summary

• Hermetically sealed glass construction
• RoHS compliant manufacturing
• Pure tin plated leads

Applications

• Low voltage stabilizers
• Voltage references
• Adapters
• Lighting applications
• On-board DC/DC converters

Procurement Notes

Verify the specific G suffix indicates RoHS compliance and hermetic sealing per the datasheet. Confirm the DO-41 package dimensions match the design requirements. Ensure the 1W power dissipation rating aligns with the thermal management strategy for the intended operating environment.

Selection Notes

Select this component when a stable 3.3V reference is required in a through-hole DO-41 package. The wide junction temperature range supports high-temperature environments. Verify that the 1W power rating meets the circuit's peak dissipation needs without exceeding thermal limits.

Part Context

This part belongs to the 1N4728G–1N4758G series from Taiwan Semiconductor, covering Zener voltages from 3.3V to 56V. All members share the same DO-41 glass package and 1W power rating, differing only in their nominal breakdown voltage and associated test currents.

Replacement Considerations

Cross-reference with other manufacturers' 1N4728A or 1N4728B equivalents. Ensure replacement parts maintain the DO-41 form factor and 1W power rating. Verify that the replacement offers equivalent hermetic sealing if environmental protection is critical.