1N4742UR-1

Overview

The Microchip Technology 1N4742UR-1 is a surface-mount Zener diode housed in the DO-213AB (MELF, LL41) package. It provides a nominal voltage regulation of 12 V with a power dissipation rating of 1 W and a tolerance of ±10%. The device operates within a temperature range of -65 °C to +175 °C and features a maximum leakage current of 5 µA.

Feature Summary

• Surface mount construction in a glass-passivated MELF package for reliable circuit integration
• High thermal stability supporting operation up to +175 °C junction temperature
• Precision voltage regulation capability at 12 V with standard tolerance

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection stages in sensitive electronics
• Clamping applications in signal conditioning paths

Procurement Notes

Verify component authenticity through authorized Microchip distributors or certified suppliers. Confirm RoHS compliance status and specific lot traceability requirements prior to acquisition. Ensure storage conditions align with manufacturer guidelines to maintain device integrity during handling and assembly processes.

Selection Notes

Select this component when a robust 12 V regulation solution is needed in a compact surface-mount form factor. The wide operating temperature range makes it suitable for demanding industrial environments. Verify that the 1 W power rating meets the thermal management requirements of the target application design.

Part Context

This part belongs to the 1N4742 series of single Zener diodes manufactured by Microchip Technology. The UR-1 suffix typically denotes specific packaging or tape-and-reel configurations within the DO-213AB family. These devices are designed for general-purpose voltage regulation tasks where reliability and consistent performance are critical.

Replacement Considerations

Direct substitutes include other 12 V, 1 W Zener diodes in the DO-213AB package from compatible manufacturers. Ensure equivalent electrical parameters such as voltage tolerance and leakage current are matched. Verify pinout compatibility and thermal characteristics before implementing any alternative component.