Current limiting
（重定向自Current limiter）
![Active current limiting or short-circuit protection](/Images/godic/202501/07/Current_limiting_using_bjt4320.gif")
![Current limiter with PNP transistors](/Images/godic/202501/07/Current_Limiter_PNP4320.PNG")
![Current limiter with NPN transistors](/Images/godic/202501/07/Current_Limiter_NPN4320.PNG")
Current limiting is the practice in electrical or electronic circuits of imposing an upper limit on the current that may be delivered to a load with the purpose of protecting the circuit generating or transmitting the current from harmful effects due to a short-circuit or similar problem in the load.