ISL9R18120S3ST

Single Diodes Overview

The ISL9R18120S3ST is a single-phase silicon rectifier diode manufactured by onsemi. It features a peak repetitive reverse voltage of 1200V and a maximum continuous forward current of 18A. The device is housed in a D2PAK (TO-263) surface-mount package with three pins. Key electrical characteristics include a maximum forward voltage drop of 3.3V, a peak non-repetitive forward surge current rating of 200A, and a peak reverse recovery time of 400ns.

Single Diodes Feature Summary

• Utilizes standard silicon junction technology for robust rectification performance.
• Designed for fast soft recovery applications to minimize switching losses.
• Capable of handling high surge currents for transient protection scenarios.

Single Diodes Applications

• Freewheeling diodes in power conversion circuits
• Snubber diodes for voltage spike suppression
• General-purpose rectification in AC-DC converters

Single Diodes Procurement Notes

Verify the specific suffix S3ST against the manufacturer's official datasheet to confirm pinout orientation and marking codes. Ensure the D2PAK footprint matches your PCB design guidelines. Confirm RoHS compliance status directly from the latest production documentation before finalizing procurement orders.

Single Diodes Selection Notes

Select this component when a 1200V blocking capability and 18A continuous current rating are required in a surface-mount form factor. Consider the 400ns reverse recovery time for switching frequency compatibility. Evaluate thermal management requirements based on the TO-263 package's thermal resistance characteristics for your specific ambient conditions.

Single Diodes Part Context

This part belongs to the family of high-voltage rectifiers originally developed by Fairchild Semiconductor, now managed by onsemi. It serves as a surface-mount alternative to through-hole packages like the TO-220AC, offering similar electrical ratings in a compact footprint suitable for automated assembly processes in modern power electronics designs.

Single Diodes Replacement Considerations

The ISL9R18120P2_NL is a documented equivalent in the TO-220AC through-hole package with identical 18A/1200V specifications. Verify pin compatibility and thermal dissipation differences when substituting between surface-mount and through-hole variants.