1N4742G R0G

Overview

The 1N4742G R0G is a Zener diode manufactured by Taiwan Semiconductor Corporation, designed for voltage regulation applications. It features a nominal Zener voltage of 12 V with a tolerance of 5%. The device has a maximum power dissipation of 1 W and operates in the DO-41 through-hole package. Key electrical parameters include a maximum dynamic impedance of 9 Ohms and a test current of 21 mA. The component supports an operating temperature range from -65 °C to +200 °C.

Feature Summary

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

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage generation

Procurement Notes

Verify the specific suffix configuration against the manufacturer's datasheet to ensure compliance with required tolerance and packaging specifications. Confirm RoHS status and lead finish details directly with the supplier or official documentation before procurement to avoid discrepancies.

Selection Notes

Select this component when a 12 V reference with 5% tolerance is required in a high-power axial package. Ensure the application environment stays within the specified -65 °C to +200 °C operating range. Verify that the 1 W power dissipation rating aligns with the thermal management capabilities of the target circuit design.

Part Context

This part belongs to the 1N47xx series of 1 W Zener diodes produced by Taiwan Semiconductor. These devices are standardized under JEDEC DO-41 mechanical outlines. The series provides a wide selection of voltage ratings from 3.3 V to 56 V, utilizing hermetically sealed glass bodies suitable for general-purpose electronic applications.

Replacement Considerations

Cross-reference with other manufacturers' 1N4742A equivalents. Verify pinout compatibility and thermal characteristics. Ensure substitute parts meet the same 1 W power rating and 12 V nominal voltage requirements.