Electronic loads should have complete protection functions. Protection functions are divided into internal (electronic load) protection functions and external (device under test) protection functions. Internal protection includes: overvoltage protection, overcurrent protection, overpower protection, voltage reverse and overtemperature protection. External protection includes: overcurrent protection, overpower protection, load voltage and low voltage protection. The choice of electronic load should choose the electronic load with true protection function. If the function is implemented by hardware, the protection will be fast. If it is implemented by software, there will be a lag in speed, and the module will be dangerous if it crashes.

Due to the special performance of electronic loads (providing a powerful test environment to meet different external needs), it occupies a large market in electronic instruments and meters.