VEMI256A-SD2 2-Channel EMI-Filter Vishay VEMI256A-SD2 2-Channel EMI-Filter is a highly integrated device designed to suppress Electro Magnetic Interference (EMI) and Radio Frequency Interference (RFI) for two protection paths. The VEMI256A-SD2 enables two separate signal or data lines to be filtered and clamped to ground. The device also includes Electrostatic Discharge (ESD) protection circuitry, which prevents damage to the protected device when subjected to ESD surges up to 30kV.