1N4738G

Overview

The Taiwan Semiconductor 1N4738G is a single-die silicon Zener diode housed in a DO-41 glass package. It provides an 8.2V nominal Zener voltage with a ±5% tolerance and a maximum power dissipation of 1W at 25°C. The device operates within a junction temperature range of -65°C to +200°C, featuring pure tin-plated leads for solderability. Electrical characteristics include a test current of 31mA, a regular impedance of 4.5Ω, and a leakage current of 10µA at 6V.

Feature Summary

• Hermetically sealed glass construction
• Wide operating junction temperature range up to 200°C
• Pure tin plated leads compliant with J-STD-002

Applications

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

Procurement Notes

Verify the specific ordering suffix (e.g., R0G for reel, A0G for ammo box) against project requirements. Confirm RoHS compliance status as indicated in the datasheet. Ensure the selected packaging quantity matches production needs. Validate that the DO-41 through-hole form factor fits the target PCB layout constraints.

Selection Notes

Select this component when a standard 8.2V regulation point is required in a high-temperature environment. The DO-41 glass package offers robust hermetic sealing compared to plastic alternatives. Consider the 4.5Ω impedance value for circuit stability requirements. Verify thermal management capabilities given the 1W power rating and specified thermal resistances.

Part Context

This part belongs to the 1N4728G–1N4758G series from Taiwan Semiconductor, covering a Zener voltage range from 3.3V to 56V. All devices in this series share the same DO-41 glass package and 1W power dissipation capability. The 'G' suffix denotes the green compound marking variant within this product line.

Replacement Considerations

Cross-reference with other manufacturers offering 1N4738 equivalents in DO-41 packages. Ensure replacement parts maintain the 8.2V nominal voltage and ±5% tolerance. Verify that alternative suppliers provide similar thermal resistance values and hermetic sealing if environmental reliability is critical.