Protected Power Switches

Technical Documentation

Protected Power Switches from ON Semiconductor offer Over−Current Protection (OCP), Over−Voltage Protection (OVP), and True Reverse Current Block (TRCB) to prevent system damage. These devices are tailored to minimize on-state resistance and provide superior switching performance, which suits them for low voltage high side load switch applications requiring low conduction loss and ease of driving. Applications for the Load Switches from ON Semiconductor include Switch for USB charging and Wireless charging, Storage & Peripherals, Other Wired Communications, Mobile Handsets, and Media Tablets, and Wireless LAN Card & Broadband Access, among others. The portfolio also includes AEC-Q101 Qualified and PPAP Capable options specifically engineered and qualified for automotive industry applications.

Product Family


A family of current-limit protected power switches that provide full protection to systems and loads from excess current conditions.


Swicthes designed to integrate control and driver functionality with a high performance low on−resistance power MOSFET in a single package.


A resettable fuse which can greatly enhance the reliability of a hard drive or other circuits from catastrophic shutdown failures.


Advanced load management switches that help designers increase system protection and reduce complexity in their designs while achieving greater system power and reliability.


eFuses of Industrial Control Panels

Learn more about ON Semiconductor efuse products with a demo featuring the NIS3320, NIS5420, and NIS5021 eFuses.

What Can eFuses be Used In?

Learn about what an eFuse really is and what are some of its key applications.

Product Resources

Application Note

The Load Switch: Selection and Use of ecoSWITCH Product

This article discusses the primary benefits of protected power switches, application considerations, and how ecoSWITCH differs from other types of integrated switch offerings.

Application Note

eFuse Load Current Measurement

This application note describes the load current measurement solution for the eFuses which do not provide load current monitoring feature.

Application Note

Understanding eFuse Input Voltage Transients from Hot Plug Events

This application note uses mathematical calculations, simulations, and actual lab data to illustrate the voltage surge as an eFuse is suddenly connected on the input side.

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