FN660-1/06

SINGLE PHASE FILTERS for chassis- and PCB-mounting SCHAFFNER Your number one name for EMC Single-phase filters for chassis- and PCB-mounting CONTENTS General information Introduction to single-phase filters ............2 Filter selection chart ...................................3 Understanding EMC standards & filter specifications......................................4 EMC measurement & engineering services .......................................................8 Ordering information...................................9 Technical data FN 22 .........................................................10 FN 250 .......................................................12 FN 332 .......................................................14 FN 343 .......................................................16 FN 346 .......................................................18 FN 350 .......................................................20 FN 352Z.....................................................22 FN 357 .......................................................24 FN 401 .......................................................26 FN 402 .......................................................28 FN 405 .......................................................30 FN 406 .......................................................32 FN 410 .......................................................34 FN 420 .......................................................36 FN 610 .......................................................38 FN 612 .......................................................40 FN 660 .......................................................42 FN 670 .......................................................44 FN 680 .......................................................46 FN 685 .......................................................48 FN 700Z.....................................................50 FN 9675 .....................................................52 Mechanical Data ..............................54 - 60 Addresses and contact information ........61 SCHAFFNER Powerline filters - a vital element of today’s electronic designs In today’s world, more electrical energy is testing. To ensure high quality we have mounting version (see following section), being generated at increasing levels of instituted a system which meets all the or an IEC inlet type which typically handle power, and more and more low power stringent requirements of the ISO 9001 / currents of up to 6-10A and are ideal for energy is being used for the transmission EN 29001. The phrase ‘Quality Assurance’ small office and industrial equipment. The and processing of data. The result is vastly is not just a slogan for us; it is applied in associated IEC 950 specification is a key increased ‘electronic smog’ or noise. This practice, and the Schaffner brand truly safety requirement for computer and noise can disrupt, and even destroy, stands for reliability and quality. office/business equipment, developed to electronic devices: an unacceptable situation, and shortly an illegal one in certain markets. The electronics industry must strive to protect equipment against such ‘noise’. provide a consistent world standard, Schaffner’s single-phase filter range provides an off-the-shelf solution for the vast majority of electronic equipment noise problems. Our standard product range is particularly wide, embracing both Noise, or interference, travels two ways. chassis-mounting and PCB-mounting Switches - such as semiconductors - can types, allowing users to select an optimal emit interference, and be susceptible to it. choice in both performance and cost The same is true for data processing efficiency terms. equipment. The most common method of which in turn simplifies the certification process. The standard specifies requirements intended to ensure safety against electrical and fire hazards for the operator and layman who may come into contact with the equipment, and where specifically stated, for service personnel. IEC 950-compliance is required for products shipped in Europe, and has Chassis-mount types either already become - or is in the In general, chassis mount filters provide a process of becoming - a de-facto standard higher performance solution, in metal in all other world markets. It has been cases for optimum connection to earth adopted by European countries under The mains, or powerline, filter is the key and good high frequency performance. EN60950, and by the USA under UL 1950. element in eliminating mains-borne With the space available for up to three Two filter families in this catalogue are interference. This filter not only has to circuit stages for attenuation of noise, available with IEC inlets, one of which is meet the requirements of electro-magnetic users can usually find an option with the compliant with IEC 950 (request separate compatibility (EMC), but safety aspects as performance to provide an off the shelf IEC inlet/IEC 950 catalogue for full details well. For some applications, the filter also solution for even the most difficult of EMC of Schaffner’s range). has to prevent the radiation of classified problems (to retrofit an EMC solution to an PCB-mount types information from the mains line (‘Tempest’ existing design for instance). Schaffner PCB filters are designed for compactness applications). Other applications require a offers chassis-mounting versions for a and ease of assembly, and avoid the need filter to protect equipment from very wide range of power levels - from less for extra mounting components and destructive voltages on the power line, like than 1A to 55A - covering a majority of installation operations necessary with those caused by lightning or nuclear higher power office equipment and low to chassis styles, but at the expense of finite explosion (NEMP). medium power industrial applications. available space for filtering circuitry. Schaffner’s breadth of product range, the At the lower power levels, users have the Consequently, they typically offer just a high attenuation characteristics of our additional choice of opting for a PCB- single stage of attenuation, with limitations protection is the use of powerline filters coupled with screening or gasketting materials. filters under various load on the maximum power handling conditions, our dedication to capability (up to 6.5A quality - and above all our current ratings). This organization’s unique typically makes these filters experience in filter design and manufacturing spanning more than 25 years - is your guarantee of excellence. ideal for those companies who have planned for EMC protection throughout the equipment design process, and are completing equipment protection with Total commitment to quality these low cost components. Schaffner’s aim is to provide components in, care needs our customers with fault- to be taken to provide a low free products. To achieve impedance connection to this, 100% of our products earth, and to minimize the undergo rigorous final potential for any noise 2 When designing these radiation from the mains inlet connection. Time to market The key reasons for choosing ready-made filters are convenience, compactness and cost. Although you can design your own mains inlet and filter using discrete Schaffner’s single-phase products - with choices to be made, whether the need is brief details on key parameters - will help for maximum performance or lowest cost. you to identify one or more filters for Our worldwide organization - with its closer review of specifications (there are numerous application engineering teams - some 170 options available in the total will gladly help your engineers select and range). From this initial selection, a review of the circuit diagram and detailed components, or have a custom solution designed and assembled for you, the provides an efficient support structure to specifications in the following pages will assist multi-national organizations with tell you if the module is suitable for your timescales involved in getting safety application, allowing you to choose a unit approvals will often rule this approach trial suitable power line filters, and dispersed design and manufacturing facilities. (or units) for trial. out, especially for higher volume products such as photocopiers which necessitate Schaffner is one of the world’s leading As a review of this catalogue will show very fast design cycles. suppliers of EMC equipment, and our you, Schaffner designs power line filters extensive experience allows us to offer using high grade components in order to Ready-made chassis- and PCB-mount one of the widest EMC filtering ranges optimize reliability. And we construct filters provide a convenient single-source available - spanning both general- modules under the control of the most solution, with the additional benefits of purpose and specialist needs like advanced quality system. Whichever custom-engineered housings for TEMPEST. This breadth of range greatly power line filter you choose, you can rely compactness. The following guide to assists designers, allowing optimum on Schaffner’s quality. Schaffner’s chassis- and PCB-mounting filter range Rapid selection Using the current rating and attenuation performance indicators, together with the major features shown on the right, this table allows you to quickly identify a ‘short list’ of filter families which are potentially suitable for your application, for 50 current rating (A) Attenuation 1 Filter family 9 standard middle high very high ✓ FN 22 ✓ FN 250, 350 ✓ FN 332 FN 343 ✓ ✓ ✓ ✓ ✓ ✓ FN 346 FN 352Z for motor drives 45 for printed-circuit mounting 40 NEMP, TEMPEST 35 for medical equipment 30 for SMPS 25 with IEC inlet 20 3 stage 15 2 stage 10 with earth line choke 5 with overvoltage protection subsequent detailed investigation using the technical specifications on the following pages. ✓ ✓ ✓ ✓ FN 401 ...406 ✓ ✓ FN 410 ✓ ✓ FN 610, 612 FN 660, 670 ✓ ✓ ✓ ✓ FN 680, 685 ✓ ✓ ✓ FN 700Z FN 9675/76 ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ 3 Understanding EMC standards and filter specifications This section introduces the standards and regulations associated with EMC protection, and provides detailed information to help you understand filter design and specifications. It will help you identify for your application the right specifications and type of filter. Interference protection standards Until recently most countries have had their own regulations and standards governing electro-magnetic interference (EMI) or radio frequency interference (RFI). Once the European standard is complete the individual members of the European Union will produce national harmonised standards and will usually give their harmonised standard a national number, eg the British harmonised standard of EN 55011 is BS EN 55011. Types of standards: Basic standards describe the general and fundamental rules for meeting the requirements. Terminology, phenomena, compatibility levels, measurement, test techniques and classification of EM environments are so described within. However, on the 1 January 1992 the Generic standards refer to specific European Directive 89/336/EMC on environments. They set minimal EMI levels which equipment in these environments must meet. Where no product specific standards exist then the generic standards are to be used. Generic standards describe household and industrial EMI environments. electro-magnetic compatibility (EMC) came into force. This directive brings a common approach to EMC to every member state of the European Union. Common standards will be used throughout Europe to ensure that technical trade barriers are removed. As well as controlling EMI emissions from equipment, the directive also calls for equipment to be immune to external Permissible noise limits The various standards set down limits for conducted EMI emissions. These limits are measured in voltage and given in dBµV where 0dB is 1µV. The interference is measured using measurement equipment which has defined bandwidths and receivers. The two receivers used are a quasi-peak detector, and an average detector. To ensure repeatability of the measurements, the impedance of the mains supply must be constant. The standards calls for a defined artificial mains network - sometimes called a line impedance stabilisation network (LISN) which gives a defined impedance to the noise and also helps filter any noise on the mains which may affect the measurements. Figure 1 shows the limits of EN 50081-1 the European generic standard for Products standards are for specific residential, commercial and light industrial products or product groups. These standards are coordinated with the generic standards. environments, and Figure 2 of EN 50081-2, In countries outside Europe other standards will be used, such as the FCC in the USA. Table 1 shows the main European standards. Above 30MHz, radiated noise interference the European generic standard for the industrial environment. electro-magnetic disturbances. The task of elaborating the standards to be used has been given to the European organisation called CENELEC. The is measured instead of conducted noise. This takes place on an open field test site using defined antennas. member countries of CENELEC are: Austria Italy Belgium Luxembourg Denmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Most of the European standards will be based upon international standards from CISPR and IEC. The numbering system used in the European standards is: EN xx yyy EN = European Norm. xx = 50 denotes that the standard is a standard of CENELEC origin; xx = 55 means the standard is based on a CISPR standard yyy; xx = 60 Product type Radio interference All aspects Household appliances & EN60555-2 EN60555-3 portable tools: vacuum cleaners, washing machines, heating, cooking equipment, dimmers EN55014 EN50082-1 Luminaires with discharge lamps EN60555-2 EN55015 EN50082-1 TV receivers EN60555-2 EN55013 EN55020 Information Technology Equipment (ITE) EN60555-2 EN55022 EN55024 all parts Mains signalling equipment EN50065-1 EN50082-2 Industrial, scientific and medical eqpt. designed to generate RF energy EN55011 EN50082-2 Industrial electronic power and control equipment EN50081-2 EN50082-2 Industrial non-electronic equipment EN50081-2 (if producing RF interference) means the standard is based on an IEC standard yyy. 4 Immunity Emissions Harmonics Voltage fluctuations Table 1. European EMC standards Level dB (dB) Level (dBµV) 66 56 56 46 flow along one phase and returns along another phase (Figure 5). 60 Quasi-peak 50 Average 46 LIGHT INDUSTRIAL & DOMESTIC 0.15 0.5 30 5 Frequency (MHz) Figure 1. Permissible interference limits for EN 50081-1 Frequency Hz Frequency (Hz) Figure 4. Discrete spectrum Interference propagation Common mode noise creates a voltage between each phase and the earth. The common mode currents flow from the noise source to the earth (usually via a parasitic capacitance) along the earth path and returns along the phases. (See Figure 6) A power line filter must be designed to attenuate both common mode and differential mode interference. EMI can propagate by two means: Level (dBµV) 79 73 Quasi-peak 66 60 Average • by radiation - where the energy can be coupled either through magnetic or electric field, or as an electro-magnetic wave between the source and the victim INDUSTRIAL 0.15 0.5 30 5 Frequency (MHz) Figure 2. EN 50081-2 limits Interference sources and spectrums The most common source of conducted EMI is power electronic products such as switched mode power supplies (SMPS), pulse width modulated (PWM) frequency converters or motor drives, and phase angle controllers. The emissions spectrum typically starts off very large at low frequency and rolls off as frequency increases. The point at which the noise falls below the permitted limits depends on several factors, the most important being the frequency of operation and the rise time of the semiconductor devices. Interference spectrums generated can be either continuous, as in the case of phase angle controllers, (Figure 3) or discrete which is typical of the SMPS (Figure 4). Level Pegel dB (dB) dB • by conduction - where the EMI energy will propagate along power supply lines and data cables Radiated and conducted EMI cannot be thought of as totally separate problems, because noise conducted along a cable may be radiated as the cable acts as an antenna. The radiation will increase as the cable length becomes comparable to the wavelength of the noise. Also, the cable will act as a receiving antenna and pick up radiated interference. Below around 150MHz, the most efficient radiating devices in a system are usually the power supply and data cables. Proper filtering of these cables will reduce radiation due to the cables as well as conducted interference. Above around 150MHz, PCB tracks and short internal cables will start to become efficient antennas. To reduce this radiation a PCB should be laid out to reduce track length and loop areas; ground planes should be used if possible. Decoupling of digital ICs is very important and shielding may be necessary. Line VDM Neutral Earth Figure 5. Differential mode interference (VDM) Line Neutral VCM VCM Earth Figure 6. Common mode interference (VCM) Mains filters Maximum power transfer occurs when source and load impedances are matched. A power line filter is an inductor-capacitor network that aims to cause maximum mismatch between impedances, and therefore reduces the amount of EMI power to be transferred from the noise source onto the power line cable. Figure 7 shows a typical single-phase power line filter. Interference types Frequency Hz FrequencyHz (Hz) Frequenz Figure 3. Continuous spectrum To understand the problems associated with conducted EMI it is first necessary to understand the two modes of conducted noise: differential mode (or symmetrical mode) and common mode (or asymmetrical mode). Differential mode interference creates a voltage between the phases of the system and is independent of earth; the differential mode currents Live Line R Cx L1 Cx Neutral L2 Earth Cy Figure 7. A typical single-phase power line filter 5 The inductors L1 and 2 are usually wound - in a current compensated fashion - on a toroidal core. This winding method allows flux due to differential mode currents and mains currents to cancel each other, while common mode currents will be added together. This gives a large inductance to common mode currents and ensures that the inductor will not be saturated by the large magnetic flux produced by the mains current. The capacitors placed between the phases, known as ‘X’ class capacitors must offer a high pulse voltage rating and are used to attenuate differential mode interference. The capacitors between the phase lines and earth, known as ‘Y’ class capacitors must have a more stringent rating and are used to attenuate common mode interference. The value of the Y capacitor is restricted by the permissible leakage current allowed. The maximum leakage current is governed by standards and regulations and depends upon the type of equipment. The leakage current is given by: IL=2 · π · U · f · c where IL is the leakage current; U the voltage across the capacitor; f the frequency of the mains voltage across the capacitor, and c the capacitance. Mains filters should be mounted as close as possible to power entry so that high frequency interference does not bypass the filter. IEC inlet modules are ideally suited for this task. and in ‘CISPR 17 Measurements’, a document published by Schaffner and available on request. In the 50Ω test condition, two sets of insertion loss curves are given. One is common (asymmetrical) mode insertion loss. The other one for differential mode interference. In general, Schaffner filters perform against common mode interference in the manner shown by the 50Ω insertion loss tests. But in differential mode, the 50Ω is not representative of effective performance. Therefore Schaffner includes the 0.1/100Ω differential mode test to show how a filter will perform in real life situations. For this 0.1/100Ω test condition, only differential mode insertion loss is given. In this test, mismatched impedances illustrate effective filter performance in a piece of equipment. Both types of insertion loss testing is carried out without load current. In equipment under load, the inductance and therefore the insertion loss - may change due to saturation. To allow for this Schaffner measures the inductance variation with current. A typical filter has an inductance variation as shown in Figure 8. CISPR17, and/or the application note ‘Everything you wanted to know ...’ can provide more detailed information. temperature of 40°C. Current at other temperatures is shown in the derating curve, or can be ascertained by the formula: I = IN √(85 - θ)/45 Voltage ratings The maximum rated voltage is 250V at 50/60Hz unless otherwise stated on the individual datasheets. Use of capacitors within Schaffner filters which conform to IEC 384 - 14 permit operation at voltages of 10% above this value. High voltage testing The high voltage rating of our filters is devided into two specifications, one for type testing and one for production testing. This is in accordance with guidelines laid down in various IEC recommendations. Type testing shall be a minimum of 2121 VDC for a minimum of 60 seconds between all terminals. However, the discharge resistor inside the filter shall be removed for this test according to IEC recommendations. All values given in this catalogue are 100% production tests for a minimum of two seconds. Repetition of voltage tests shall not exceed 80% of the specified values. Leakage current The leakage current to ground for each type is given as a maximum value per phase, at 230V/50Hz. Safety approvals Filters in this catalogue are approved by the major world safety approval agencies. Each datasheet indicates the current safety approval To achieve higher attenuation or an increase in the effective working frequency range more complex filters than the one shown in Figure 7 can be made using more common mode or differential mode inductors and capacitors. status. The relevant file numbers for our Insertion loss SEV The insertion loss characteristics for each filter shown on the datasheets, are measured in accordance with CISPR 17. Two test conditions are employed: one using 50Ω termination impedances, the other using an input impedance of 0.1Ω and an output impedance of 100Ω (and reverse conditions). Both test methods can be found in section 4.2 of CISPR 17, 6 filters are: UL E64388 CSA LR 44788 Test: UL 1283 Test: CSA 22.2 No. 8-M1986 Test: IEC 939 Figure 8. Typical saturation curve VDE 7226-4730-10.. Test: VDE 0565-3 General technical data SEMKO All technical data are given at 25ºC unless otherwise specified. Almost all of the filters in this catalogue Current ratings Class I and Class III installations with The current ratings given for each type is the maximum allowable current authorised by safety agencies at an ambient Basic and Supplementary Insulation. For Test: IEC 939 meet the requirements of IEC 950 for further information see Schaffner’s application note ‘IEC 950’. Flammability class All filters in this catalogue are UL 94V2 or UL94V0. MTBF figures In addition to safety approvals, Schaffner filters also have the high reliability shown in the MTBF (mean time between failure) values given for each filter family. This is the lowest typical value for any filter in the particular family and is calculated according to Mil-HB 217-F, for maximum rated current and voltage in an ambient temperature of 40°C. MTBF is stated in hours. Components The component values given in the detailed product pages are nominal. The value of inductors and capacitors can vary from this nominal value. The tolerance and test conditions for these components is shown in the following table: Parameter Inductance Capacitance Resistance - Tol. 30% 20% 10% + Tol. 50% 20% 10% Test 1kHz 1kHz DC Climatic classification Schaffner filters fulfil the requirements of the HPF climatic classification according to DIN 40040 (ambient temperature -25 to +85°C). Filters with a connecting cable - such as types FN 0.8 to FN 20 meet the requirements of the HSF climatic classification (ambient temperature -25 to +70°C). The letters of the climatic classification are coded as follows: 1st letter: Lower temperature limit: H ≅ -25°C 2nd letter: Upper temperature limit: S ≅ +70°C P ≅ +85°C 3rd letter: Permissible humidity (relative): F ≅ 75% yearly average 95% highest value for 30 days 85% highest for all other days According DIN IEC 68 Part 1, the climatic category is given by three numbers, separated by / Sample: 25/085/21 1st number: Lower temperature limit: -25°C 2nd number: Upper temperature limit: +85°C 3rd number: Humidity, 90-95% R.H. 21 days Filters with a greater temperature range, for special applications and for military use, are available on request. Filters with earth line chokes It is possible to get interference induced on all cables of a system simultaneously. In this case the same noise will also be induced onto the earth cable. A standard filter will reduce the noise on the phase lines but not on the earth. The noise on the earth line will then be able to enter the equipment and may cause the equipment to malfunction. To reduce this interference earth line chokes may be fitted or incorporated into the filter. The earth line choke will also provide extra attenuation for normal common mode currents. Care must be taken not to bypass earth line chokes in systems. For example a PC may have a filter with an earth line choke fitted, if this PC is connected to a printer that is powered from the mains supply, and if the printer does not have an earth line choke, the noise may find a path from the mains into the printer and along the data cable into the PC bypassing the earth line choke in the PC. Filters for medical equipment For enhanced safety in medical applications, Schaffner offers ‘B’ versions of many of its filters, offering lower leakage current (3µA typical), a discharge resistor, and higher potential test values (for example FN 326B). magnetic fields, and if all feed lines to these areas are protected with voltage limiting devices such as varistors, gas discharge tubes and suppressor diodes. Special filters for TEMPEST Telecommunication or data processing equipment can radiate signals, or propagate them along power lines, providing a mechanism for unauthorised persons to access classified information. The study and blocking of such sensitive signals is known as TEMPEST. Mains filters with high attenuation over a large frequency range are necessary. An optimum filter solution can only be found by an exact specification of requirements. The FN 700Z filter series has been used in many TEMPEST applications. Other suitable filters are available on request. Customer-specific filters Schaffner’s standard range of filters cover the majority of customers’ requirements. But depending on the application, specific criteria might need to be considered. With our many years of experience, as well as the flexibility and capability of our five development centers located throughout the world, Schaffner can offer companies an efficient and reliable custom engineering service. To date, Schaffner has produced over 4000 custom filters, ranging from 0.1 amps up to 1200 amps, from a matchbox size to rack mount designs, with up to 23 input connections, used in all forms of environments from offices to submarines to factories to military armoured vehicles. Special filters for NEMP A nuclear electro-magnetic pulse (NEMP) is a high intensity, short duration, electromagnetic field produced as a result of a nuclear explosion outside the atmosphere (exo-atmospheric). The most critical threat for technically highly developed nations is an exo-atmospheric burst (at an altitude of more than 40 km) producing a NEMP inducing in antennas, power transmission networks etc, such high voltages and currents that it may leave a whole continent without power, telephone or radio communications. Electronic equipment can be protected against a NEMP if it is placed in special room or housing which screen it from the electro- 7 SCHAFFNER EMC measurement and engineering services Expert EMC Support In addition to offering one of the world’s most comprehensive ranges of standard filter products, Schaffner offers the full complement of measurement and engineering services to support equipment manufacturers and users. EMC testing Engineering services Schaffner operates the most sophisticated EMC test facilities available anywhere today - with extensive investment in screened rooms, specialist test equipment, and application engineering teams - distributed at seven locations throughout the world. Services available at these locations include: Schaffner has the largest world engineering experience in solving EMC problems. In addition to testing and measuring services Schaffner can provide the expert engineering support to help you bring your equipment to market quickly and efficiently; services available include: • Faraday cage and open field testing • harmonics instrumentation for current and voltage to the 49th harmonic • radio emission measurements to CISPR, EN, VDE, FCC, Mil or SEV • simulation of electro-magnetic fields • simulation of short-term DC or AC mains failures • simulation of transient parasitic voltages • electro-static discharges to IEC 801-2, VDE 0843 part 2 specifications • AC and DC insulation testing 8 • custom filter design - to optimize filter performance, and solve space, layout, mounting or connection problems • circuit and equipment design - advising on circuit and equipment or enclosure design to overcome EMC problems • turnkey component design and build SCHAFFNER Ordering information For all single-phase filters (except FN 22) FN 250 & - x / y connections 01 = solder-lug 02 = pin for PCB mounting 03 = clamp terminal with M4 screw 05 = AMP fast-on 06 = solder-lug/fast-on combination 07 = wire 10 = screw feed-through 13 = AMP fast-on 16 = mini fast-on 23 = clamp terminal 29 = terminal block 33 = terminal block 38 = AMP fast-on for details see mechanical data pages current rating (A) A = low leakage (small Y capacitors) B = medical version (without Y capacitors) Z = surge voltage protection filter type Examples: FN 670-1.8/07 Type FN 670; current rating 1.8A; with wire connections FN 350-55/33 Type FN 350; current rating 55A; with safety terminal block connections 9 SCHAFFNER FN 22 Compact PCB-mounting filter Provided in a compact plastic housing suitable for use with automatic assembly equipment, this PCB-mounting filter offers good basic performance, with a profile which suits equipment designs such as monitors, terminals and power supplies. • compact PCB-mounting design • auto-insertion machine friendly See Mechanical Data (pages 59 and 60) for full details of housings and connections. Filter selection table Approvals Choose the family FN xxx with the required current rating and features, and add /2 or /3 to determine the component value. Family Connections Current ratings Capacitance A at 40°C (25°) Cx nF Cy nF V DE Inductance Housing Weight L mH g FN 22 -0.8 /2 ✓ 0.8 (0.95) 47 2.2 10 KA1 30 FN 22 -0.8 /3 ✓ 0.8 (0.95) 15 2.2 0.3 KA1 30 Additional specifications Filter type Standard types Maximum leakage Maximum operating voltage µA/phase VAC Hz 190 250 50/60 MTBF at 40°C, 230V, per Mil-HB-217F: 2,750,000 hours. 10 Operating frequency Hipot test voltage Hz PN→E VAC P→N VDC DC to 400 2000 1700 Insertion loss Per CISPR 17; A = 50Ω/50Ω sym, B = 50Ω/50Ω asym, C = 0.1Ω/100Ω sym, D = 100Ω/0.1Ω sym FN 22-0.8/2 types FN 22-0.8/3 types dB dB 70 70 y 60 50 40 40 B 20 10 C 0 0 -10 -10 -20 10k 100k A 30 D 20 10 B 60 A 50 30 y 1M -20 10k 10M C D 100k 1M 10M Electrical schematics 2xCy Cx LINE P 2xL P' LOAD FN 22 E N N' See tables for component values. 11 SCHAFFNER FN 250 Input filter for motor drives High inductance and capacitance values optimized for common mode attenuation in the 0.1-1MHz range make this filter ideal for a large variety of motor drive applications. Long wire connections give great installation flexibility, simplifying assembly for drive manufacturers. • 6 to 20A current ratings • compact housings with long wire connections • meets EN55011(A) for drives with motor cables