1N4740UR

Overview

The Microchip Technology 1N4740UR is a surface-mount Zener diode designed for voltage regulation applications. It operates within the DO-213AA-2 package, also known as SOD-80C, and features a power dissipation rating of 1 W. The device maintains a nominal Zener voltage of 10 V with a tolerance of 5%. It supports an extended operating temperature range from -65 °C to +175 °C, ensuring reliability in demanding environments.

Feature Summary

• Provides stable voltage regulation using silicon Zener breakdown characteristics
• Engineered for surface-mount assembly via compact DO-213AA-2 footprint
• Capable of sustaining high thermal loads up to 1 W power dissipation
• Rated for extreme ambient conditions spanning -65 °C to +175 °C

Applications

• Voltage reference circuits requiring precise potential levels
• Overvoltage protection stages in sensitive electronic systems
• Clamping applications for transient suppression
• Biasing networks in analog signal processing paths

Procurement Notes

Verify the specific suffix UR against official Microchip documentation to confirm surface-mount configuration and lead-free status. Ensure the DO-213AA-2 footprint matches your PCB layout constraints. Cross-reference electrical parameters such as Zener impedance and leakage current with the latest datasheet to validate performance requirements for your specific design environment.

Selection Notes

Select this component when a 1 W surface-mount Zener diode is required for space-constrained designs. The 10 V nominal voltage suits standard logic level referencing. Consider the wide temperature range if the application involves harsh industrial or automotive conditions. Verify that the 5% tolerance meets the circuit's precision needs without requiring additional trimming.

Part Context

This part belongs to the 1N47xx series of 1 W Zener diodes manufactured by Microchip Technology. The 'UR' suffix typically denotes a specific surface-mount packaging variant, distinguishing it from through-hole equivalents like the 1N4740A. This series is widely used in general-purpose electronics for reliable voltage stabilization and protection functions.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4740 variants in SOD-80C packages, provided they meet the 10 V, 1 W, and 5% tolerance specifications. Ensure thermal and electrical characteristics align before substitution.