Features 1、5A OVERCURRENT PROTECTION: The 5A overcurrent protection sensor module uses current transducer to collect AC signals to achieve relay signal output after overcurrent in the range of 0‑5A 2、STABLE OPERATION: The relay is closed when overcurrent, and the relay is released when there is no overcurrent 3、3 PORT CONTROL: The user can use the COM, NC, and NO ports of the relay to control the on and off of the external circuit, so as to realize the over current protection function 4、SWITCH SIGNAL OUTPUT: Adopting the output mode of switch signal output. The working current is &lt;20MA, and the working frequency range is 20Hz‑400Hz 5、NOTE: Adjusting the relay clockwise to reduce the detection current, you can use the relay module with confidence Specification Item Type:Relay Module Material: Plastic Working Current: <20MA Operating Frequency Range: 20Hz-400Hz Output Mode: Switch Signal Output Maximum Detection Wire Diameter: Approx. 5.2mm/0.2in Mounting Hole: the Hole Diameter is 3mm/0.12in, the Hole Distance is 52.5mm/2.1in Working Environment: -40℃~+85℃, 0-95%RH Package List 1 x Relay Module