In general, chassis mount filters provide a higher performance solution. With metal cases for optimum connection to earth and good high frequency performance and space available for up to three circuit stages for attenuation of noise, users can usually find an option with the performance to provide an off-the-shelf solution for even the most difficult of EMC problems (to retrofit an EMC solution to an existing design for instance).
250 VAC Maximum Operating Voltage at 50/60 Hertz
DC to 400 Hertz Operating Frequency
800,000 Hours MTBF at 40°C, 230 V, Per Mil-HB-217F