Features: Power supply EMI filter is a kind of reactance-type low-pass filter, installed at the power supply input of electronic equipment. It can inhibit noise transmitted through grid power cable, and can inhibit high-frequency interference signals generated by the electronic device itself. High quality imported components provide obvious filtering effect. EMI has become a must have device installed in electronic equipment. Widely used for precision measuring instruments, building automation, precision machinery, elevator lifting equipment, automated system, calculator inverter office equipment, servo system inverter equipment, frequency conversion equipment, lighting equipment, information and communication equipment, UPS power supply, automotive electronics, etc. Specifications: Module Filtering Categories: 2-stage filtering Length: 9.5cm/3.7in Weight: 50g(approx.) Note: EMI filter should be installed at the inlet of power supply, to reduce radiation interference. It is better to choose twisted-pair cable as EMI filter connection cable, which can eliminate some high-frequency interference signal. EMI filter input and output cable must not be parallel, keep them away from each other to a certain distance in order to ensure the function of filter. E point and case of EMI filter must be in good contact, and connect to ground wire. Package Includes: 1 x Filter Board