In the fields of medical equipment, electro magnetic interference (EMI) between several medical devices may be life threatening. Schaffner, the market leader in EMC filters and power quality devices, has consistently extended its proven IEC Inlet family with single- and dual stage IEC inlet filter adapted to the market needs and, especially when it comes to human lifes, is keen on constantly improving the state of the art of interference suppression of devices for medical application.
There are several product families dedicated to the use in medical market. The main benefits are high performance of core material under restrictions of leakage currents.
Download here all information about the challenging requirements for medical equipment and Schaffner's EMC solutions:
Filters like FN9262, FN9255 or FN9280/90 enable customers to find a high performance variation for any customer need.
The FN92xx series are designed for currents of 1 to 20 A up to 250 VAC, 50/60Hz. Detailed information on MOP (Means of protection) is available in the datasheets (free download below) or in adjacent approval documentation of the filters.
Schaffner is keen to announce that we are able to support even highest demanding Class II applications with an upcoming product.
The filter which can be used in 2 MOPP (means of patient protection) surroundings incorporates a very high attenuation performance in a fully isolated plastic housing. The product FN9274B is available without earth connection based on C17/C18 combination of cable and inlet.
Not only our filtered IEC inlets can be used for emc compliance in medical environment, also chassis mount filters for higher power rating or high attenuation performance demands can be used as medical device filters.
Click on the product number below to download the free data sheets:
All standard filters of Schaffner offer a reduced leakage current version which is denoted by different letters (for new filters different coding) in addition to the already known FN part designation.
Those versions are available on request in addition to our usual filters, main benefit is the certification which is already in place for all versions (click here to download our Declaration of Conformity)
Customers can therefore easily integrate and use our filters in their systems, without loosing time for additional approvals of the filters.
Due to high demand of IEC inlets and Schaffner's expertise in manufacturing and design of such inlets, we are able to provide a high variety of possible inlets without a filter.
All are available for front, rear and snap mounting, including the following standards according to IEC 60320/UL 60320-1:
C14 version including various other features like fuse holder, switch, voltage selector or combination of all are also available.
For integrated EMI performance solutions Schaffner offers a wide variety of chokes. Building up an own EMI filter based on chokes gives the customer freedom to design the EMI filter in accordance to the performance-to-leakage-current specifications from the scratch.
Samples are available on request or can be ordered through our worldwide distribution network.
There are several additional applications with higher power rating, like magnet resonance imaging or X-ray systems. These kind of systems do have very high demand not only on power but also on EMI/EMC filtering.
For example an X-Ray equipment has different load and emission characteristics than other equipment.
There are two very different load types within the X-ray machine:
The CM noise from motor drive requires a high CM insertion loss in the filter and poses the risk of CM saturation to current compensated filter chokes. There is only moderate differential mode (DM) insertion loss required from the filter, however the high current X-ray load poses a risk of DM saturation to current compensated filter chokes. Because of the intermittent X-ray load, the load peak current is more than 15x the RMS current. This puts a high DM saturation stress on the chokes. Because of medical application, the total filter Y capacitance is restricted, which puts more CM saturation stress on the chokes.
Schaffner offers several different three phase filters, which can be used in medical applications like mentioned above. With the interchangeable capacitor configuration they can be adjusted to any kind of leakage current circumstances needed. Newest product family, which is very commonly used in such applications, is the FN3287/8 (Link: Datasheet FN3287/8) with reduced Y-caps. If the standard filter solution does not fulfill all different design specifications Schaffner can also support with hand-in-hand development support. Our expertise ranges from less than 1A to filters covering more than 3000A nominal current.