EPCOS offers three different types of product for the output filter position. First is the standard MKP DC Link which was previously discussed. Another option is a standard polyester or MKT series, B3252, which has a capacitance range of up to 220µF and voltage rating of up to 630 VDC. If an AC voltage capability is required, the EMI capacitors which were previously discussed for the input filter position can be offered. An additional solution is the polypropylene or MKP AC filter, the B3279 series. This series has a design similar to the EMI filter but may not require UL qualification. This allows flexibility in the filter design in terms of the physical size, voltage rating, and capacitance range offering. The B3279 series features a voltage rating of up to 400 VAC and a capacitance value of up to 75µF while the standard X2 capacitor is limited to a capacitance of 45µF and a voltage rating of 305 VAC.