1N4729G

Overview

The Taiwan Semiconductor 1N4729G is a silicon planar power Zener diode designed for voltage regulation and clipping applications. It operates within the 1N4728G to 1N4758G series, featuring a nominal Zener voltage of 3.6V with a standard tolerance of ±5%. The device is housed in a hermetically sealed DO-41 glass package and supports a maximum power dissipation of 1W at 25°C. It offers a wide junction temperature range from -65°C to +200°C, ensuring reliable performance in various electronic circuits.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Wide selection of Zener voltages ranging from 3.3V to 56V
• Standard ±5% Zener voltage tolerance for precise regulation
• High thermal stability with a maximum junction temperature of 200°C

Applications

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

Procurement Notes

Verify the specific ordering suffix (e.g., R0G or A0G) to confirm the required packing quantity and type, such as 5,000 units per reel or 3,000 units per ammo box. Ensure compliance with RoHS standards if applicable to your manufacturing process. Confirm that the DO-41 package dimensions align with your PCB layout requirements before finalizing procurement orders.

Selection Notes

Select the 1N4729G when a stable 3.6V reference is required in high-power scenarios up to 1W. Consider its ±5% tolerance for general-purpose regulation rather than precision applications requiring tighter limits. Evaluate the thermal resistance values to ensure adequate heat dissipation in enclosed spaces. Verify that the pure tin-plated leads meet your solderability standards according to J-STD-002 specifications.

Part Context

This component belongs to the 1N4728G–1N4758G series manufactured by Taiwan Semiconductor Corporation. The 'G' suffix typically denotes Green Compound packaging, indicating RoHS compliance. These diodes are part of a broader family of silicon planar power Zener diodes available in the DO-41 case, offering a comprehensive range of voltage options for industrial and consumer electronics.

Replacement Considerations

Direct replacements include other manufacturers' 1N4729 variants in the DO-41 package, such as Vishay 1N4729/E1 or Microchip 1N4729G. Ensure the substitute maintains the 1W power rating, 3.6V nominal voltage, and ±5% tolerance. Verify that the replacement also features hermetically sealed glass construction and compatible lead plating for soldering.