EMI filters are widely used across electronics applications to suppress noise and interference in circuits. For better performance, new versions are optimized to have a high filtering efficiency but a low insertion loss to ensure that they minimize disruption in signal transmission.
To guarantee enhanced suppression capability and reliability, some Chinese manufacturers of EMI filters have added components while maintaining designs compliant with the miniaturization trend. Shanghai Meisongbei, for instance, has introduced a series with a toroidal inductor and a bleeder resistor. These general-purpose devices, with 110/250V rated voltage and 1 to 50A rated current, have an IEC 320 socket for a secure connection, although other output terminal options are available.
Commonly produced EMI filters in China are single- and three-phase variants with 250 or 480VAC rated voltage, 10 to 600A rated current and -25 to 100 C operating temperature. These are generally compliant with industry safety standards, including UL, cUL, CE, CB, CSA, ENEC and RoHS.
China-made EMI filters are made using passive components, such as inductors, capacitors and resistors. These inputs are sourced from domestic or overseas suppliers, including Murata, TKD, Taiyo Yuden, Yageo, Chilisin, Fenghua Advanced, Sunlord and Three-Circle.
After experiencing fluctuations in the past year, Chinese companies are optimistic component costs and EMI filter prices will stabilize in the months ahead.
EMI filter, 0.5 to 6A rated current
Company: Shaanxi Shinhom Enterprise Co. Ltd
This EMI filter from Shaanxi Shinhom, model LA110P-1, is designed for PCB mounting. It may have a rated current of 0.5 to 6A and a plastic or metal case, depending on the requirements.
MOQ: Negotiable
Lead time: 15 days
EMI filter, 250VAC/100 to 600VDC rated voltage
Company: Shaanxi Shinhom Enterprise Co. Ltd
Shaanxi Shinhom’s DW162320WMW3N is an EMI filter with a rated voltage of 250VAC or 100 to 600VDC, a rated current of 6 to 30A and a temperature range of -25 to 85 C.
MOQ: Negotiable
Lead time: 15 days
EMI filter, 3, 6 or 10A rated current
Company: Shallin Electronics Co. Ltd
The K24204B from Shallin is an EMI filter with 125/250VAC voltage, 3, 6 or 10A rated current, 0.8mA maximum leakage current at 250V, 50Hz, 100Mohm minimum insulation resistance at 250VDC and -25 to 85 C operating temperature. It meets cUL, VDE, CCC and RoHS requirements.
MOQ: Negotiable
Lead time: 20 days
EMI filter, 1A rated current
Company: Shallin Electronics Co. Ltd
An EMI filter, Shallin’s model K2420A has 125/250VAC voltage, 1A rated current, 0.8mA maximum leakage current at 250V, 50Hz, 100Mohm maximum insulation resistance at 250VDC and -25 to 85 C operating temperature. It has UL, CSA, VDE, CE and CQC approvals.
MOQ: Negotiable
Lead time: 20 days
EMI filter, 115/250V, 10A rating
Company: Shenzhen Win-Kare Technology Co. Ltd
An EMI filter, the YB11C2-10A-Q from Shenzhen Win-Kare has a rating of 115/250VAC, 10A and an operating temperature of -25 to 85 C. It is CE-approved and UL-listed.
MOQ: 500 units
Lead time: 15 days
EMI filter, 10A rated current
Company: Shenzhen Win-Kare Technology Co. Ltd
Shenzhen Win-Kare’s EMI filter, the YB12C4-10A-Q has a rated voltage of 115/250VAC and a rated current of 10A.
MOQ: 500 units
Lead time: 15 days
