What this 200mA current-limit switch does
The Maxim Integrated MAX4789EUK-T is a 200mA current-limit switch designed to protect power rails and loads from overcurrent conditions. It acts as a resettable electronic fuse, limiting output current to a preset level when the load exceeds the threshold, then recovering automatically once the fault clears. This part is typically used in USB ports, hot-swap controllers, and general-purpose power distribution where a compact, single-channel current limiter is needed.
Lifecycle and compliance check
If your BOM mandates RoHS compliance, you will need to source a lead-free alternate or verify an exemption applies.
For automated pick-and-place, confirm the reel or tray option with your distributor. The SOT-23-5 footprint is standard and well-supported by layout libraries.