1N4109UR

Single Zener Diodes Overview

The Microchip Technology 1N4109UR is a surface-mount Zener voltage regulator diode designed for precision regulation in compact electronic circuits. It features a nominal Zener voltage of 15 V with a tight tolerance of 5%. The device operates within a wide temperature range from -65 °C to +175 °C and dissipates up to 500 mW of power. Key electrical characteristics include a maximum reverse leakage current of 50 nA, a Zener impedance of 100 ohms, and a test current of 250 µA. It utilizes the DO-213AA (SOD-80) package.

Single Zener Diodes Feature Summary

• Surface-mount construction in a compact DO-213AA glass package
• Internal metallurgical bond option for enhanced reliability
• Wide operating temperature range suitable for harsh environments
• Low leakage current for stable voltage regulation

Single Zener Diodes Applications

• Precision voltage reference circuits
• Over-voltage protection stages
• Temperature-compensated bias networks
• Clamping applications in high-reliability systems

Single Zener Diodes Procurement Notes

Verify the specific suffix requirements against your design specifications, as variants such as JANTX or CURTR may offer different tolerances or military qualifications. Confirm that the DO-213AA footprint matches your PCB layout constraints. Ensure the selected component meets the required thermal dissipation capabilities for your intended application environment.

Single Zener Diodes Selection Notes

Select this component when a 15 V regulation point is required in a surface-mount form factor. Consider the 5% tolerance and 100 ohm impedance for standard regulation needs. Evaluate the 500 mW power rating against expected surge currents. Compare against through-hole equivalents if board space permits, but prioritize this variant for automated assembly processes.

Single Zener Diodes Part Context

This part belongs to the 1N4099 series of 0.5 W glass surface mount Zener diodes. It serves as the SMD equivalent to the axial-leaded 1N4109. The series offers voltages from 1.8 to 100 V. The "-1" suffix typically denotes an internal metallurgical bond, distinguishing it from non-bonded commercial types. It is manufactured by Microchip Technology, formerly Microsemi.

Single Zener Diodes Replacement Considerations

• 1N4109DUR
• JANTX1N4109-1