1N4112UR

Single Zener Diodes Overview

The Microchip Technology 1N4112UR is a surface-mount Zener diode designed for voltage regulation applications. It features an 18 V nominal breakdown voltage with a ±5% tolerance and a maximum power dissipation of 250 mW. The device utilizes a DO-213AA (SMB) package and exhibits a maximum dynamic impedance of 100 Ω at the test current of 2.5 mA. It operates within a junction temperature range of -65 °C to +175 °C, providing stable performance in compact electronic designs requiring precise voltage reference or protection.

Single Zener Diodes Feature Summary

• Metallurgically bonded glass construction for enhanced reliability
• Surface-mount SMB package for automated assembly
• High thermal stability up to 175 °C junction temperature

Single Zener Diodes Applications

• Voltage regulation in portable electronics
• Overvoltage protection circuits
• Reference voltage sources in measurement equipment

Single Zener Diodes Procurement Notes

Verify the specific suffix (e.g., UR vs. UR-1) against the manufacturer's official datasheet to confirm exact electrical tolerances and plating specifications. Ensure the procurement source provides traceability documentation for quality assurance. Confirm RoHS compliance status if required by the end-product regulations, as variants may differ in material composition.

Single Zener Diodes Selection Notes

Select this component when a low-profile surface-mount Zener diode is required for 18 V regulation. Compare the 250 mW power rating against circuit dissipation requirements. Verify that the 100 Ω dynamic impedance meets the noise and stability criteria of the application. Ensure the DO-213AA footprint matches the PCB design constraints.

Single Zener Diodes Part Context

This part belongs to the standard Zener diode family used for voltage clamping and regulation. It is functionally similar to through-hole equivalents like the 1N4112 but adapted for surface-mount technology. The series includes various voltage ratings within the same package style, allowing for standardized inventory management across different voltage reference needs in consumer and industrial electronics.

Single Zener Diodes Replacement Considerations

Direct substitutes include the 1N4112UR-1 from Microchip/Microsemi, which shares identical electrical characteristics and packaging. Other manufacturers offering equivalent 18 V, 250 mW SMD Zener diodes in DO-213AA packages may be considered after verifying pinout compatibility and thermal performance specifications.