1N4742A A0G

Overview

The Taiwan Semiconductor 1N4742A A0G is a single-channel voltage regulator diode housed in a DO-41 through-hole package. It features a nominal Zener voltage of 12 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +200°C. Key electrical characteristics include a test current of 21 mA, a maximum Zener impedance of 9 Ω, and a maximum reverse leakage current of 5 μA.

Feature Summary

• Hermetically sealed glass construction for corrosion resistance
• Compression bonded internal structure
• Pure tin plated terminals ensuring solderability

Applications

• Voltage stabilization circuits
• Reference voltage generation
• Overvoltage protection

Procurement Notes

Verify the specific 'A0G' suffix against official datasheets to confirm packaging details, as suffixes often denote tape-and-reel or ammo pack configurations. Ensure compliance requirements such as RoHS are explicitly documented for this variant before procurement.

Selection Notes

Select this component when a standard 12 V regulation point is required in through-hole designs. The wide operating temperature range up to 200°C makes it suitable for high-thermal environments where standard plastic packages may fail.

Part Context

This part belongs to the 1N47 series of silicon Zener diodes manufactured by Taiwan Semiconductor. These components utilize a glass passivated junction and are designed for general-purpose voltage regulation applications requiring reliable performance in axial leaded formats.

Replacement Considerations

Cross-reference with other manufacturers offering the 1N4742A specification. Verify that substitute parts match the 12 V nominal voltage, 1 W power rating, and DO-41 mechanical dimensions.