1N4747G

Overview

The Taiwan Semiconductor 1N4747G is a single-die, unidirectional Zener voltage regulator diode housed in a DO-41 axial through-hole package. It provides a nominal Zener voltage of 20 V with a standard tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a junction temperature range of -65°C to +200°C. Electrical characteristics include a test current of 12.5 mA, a maximum dynamic impedance of 22 Ω at the test current, and a leakage current not exceeding 5 µA.

Feature Summary

• Hermetically sealed glass construction for environmental protection
• Wide operating junction temperature range up to +200°C
• Standardized ±5% Zener voltage tolerance
• Pure tin plated leads compliant with J-STD-002 solderability standards

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, as packaging formats vary. Confirm RoHS compliance status directly with the manufacturer documentation. Ensure the selected variant matches the required thermal resistance parameters for the intended heat dissipation environment.

Selection Notes

Select this component when a robust, high-temperature tolerant Zener diode is required for general-purpose voltage regulation. The DO-41 package offers reliable through-hole mounting for industrial environments. Consider the 1 W power rating and thermal resistance values to ensure adequate heat sinking if operating near maximum ratings.

Part Context

The 1N4747G belongs to the 1N4728G–1N4758G series manufactured by Taiwan Semiconductor Corporation. This series covers a broad Zener voltage spectrum from 3.3 V to 56 V, all sharing identical mechanical dimensions and thermal characteristics within the DO-41 glass passivated package.

Replacement Considerations

Cross-reference with other manufacturers' 1N4747A equivalents. Verify that substitute parts maintain the same DO-41 footprint, 1 W power rating, and ±5% voltage tolerance to ensure mechanical and electrical compatibility without circuit redesign.