UZ5718

Single Zener Diodes Overview

The UZ5718 is a high-power Zener diode manufactured by Microchip Technology, designed for voltage regulation applications. It features a nominal Zener voltage of 18 V with a tolerance of ±5%. The device supports a maximum power dissipation of 5 W and exhibits a maximum dynamic impedance (Zzt) of 4 Ohms. Reverse leakage current is specified at 10 μA when measured at 13.7 V. This component belongs to the Zener Diodes product category under Diodes & Rectifiers.

Single Zener Diodes Feature Summary

• Provides stable voltage regulation with a nominal 18 V breakdown voltage
• Capable of handling high power dissipation up to 5 W
• Maintains low dynamic impedance for consistent performance under varying currents

Single Zener Diodes Applications

• High-power voltage reference circuits
• Overvoltage protection in industrial systems
• Linear voltage regulator designs requiring robust thermal performance

Single Zener Diodes Procurement Notes

Verify the specific package type and pin configuration against the official Microchip datasheet before integration, as physical dimensions are critical for PCB layout. Confirm that the 5 W power rating aligns with your thermal management strategy, including heatsinking requirements. Ensure the operating temperature range meets your system's environmental specifications. Cross-reference the reverse leakage current limits with your circuit's sensitivity to ensure proper functionality under all expected conditions.

Single Zener Diodes Selection Notes

Select the UZ5718 when a precise 18 V reference is required with significant power handling capabilities. Consider this component over lower-power alternatives if the application involves substantial current fluctuations or requires high stability. Evaluate the thermal resistance of your assembly to ensure the 5 W rating can be sustained without exceeding junction temperature limits. Compare the 4 Ohm impedance against other models if transient response speed is a critical design parameter.

Single Zener Diodes Part Context

The UZ5718 is part of Microchip's broader portfolio of discrete semiconductor devices, specifically within the Zener Diodes segment. It complements other voltage regulation components by offering higher power density compared to standard small-signal diodes. This series is engineered for reliability in demanding electronic environments, supporting various industrial and commercial applications where stable voltage clamping is essential.

Single Zener Diodes Replacement Considerations

Consult Microchip's official substitution guide for verified equivalents. Generic replacements may not match the 5 W power rating or 4 Ohm impedance characteristics. Verify that any substitute maintains the 18 V nominal voltage and ±5% tolerance to ensure circuit compatibility.