EMC components are used to reduce conducted electromagnetic interferences to the limits defined in an EMC plan or below the limits specified in the EMC standards (Figure). These components may be installed either in the source or in the disturbed equipment.
Among world leaders in the field of elecotronic components production one can note EPCOS. The company offers the world‘s biggest selection of EMC components with a wide range of rated voltages and currents for power lines as well as for signal and control lines supporting customers throughout the entire product development cycle – from the design phase up to volume production.
Interference sources and disturbed equipment
An interference source is an electrical equipment which emits electromagnetic interferences. We can differentiate between two main groups of interference sources corresponding to the type of frequency spectrum emitted (Figure). Interference sources with discrete frequency spectra (e.g. high-frequency generators and microprocessor systems) emit narrowband interferences. Switchgear and electric motors in household appliances, however, spread their interference energy over broad frequency bands and are considered to belong to the group of interference sources having a continuous frequency spectrum.
Electrical equipment or systems subject to interferences and which can be adversely affected by it are termed disturbed equipment. In the same way as interference sources, disturbed equipment can also be categorized corresponding to frequency characteristics. A distinction can be made between narrowband and broadband susceptibility (Figure). Narrowband systems include radio and TV sets, for example, whereas data processing systems are generally characterized as broadband systems.
- Common-mode interferences (asymmetrical interferences):
– occurs between all lines in a cable and reference potential;
– occurs mainly at high frequencies (approximately 1 MHz upwards). - Differential-mode interferences (symmetrical interferences):
– occurs between two lines (L-L, L-N);
– occurs mainly at low frequencies (up to several hundred kHz). - Unsymmetrical interferences:
-this term is used to describe interferences between one line and the reference potential.
EPCOS filters 1-line
EMC Filters. SIFI series
SIFI series(B84111, B84112, B84113, B84114, B84115) - new components providing EMC. These filters are suitable for application in lines up to 250V with frequency 50/60 Hz. Compact sizes and low leakage current are important for application in industrial equipment, data transfer, in radio-TV-devices. The connection of filters is being provided according to TN/TT. Together with standard series with low values of leakage current the models ith etremely low leackage current for application in medicine equipment is provided.
| Series | Nominal current, А | Nominal voltage, V | Connection | Interferences suppression, Hz | Documentation | ||
| B84111F | 3 … 36 | 250 AC/DC | TT/TN |
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| B84112G |
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| B841113H |
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| B84111A | 1 … 20 |
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| B84115E | 3 … 10 |
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EMC-filters: B84103 series
Filters B84103 are suitable for mounting into the device. They are equipped with bipolar disconnecting switch that provides the best protection from interferences and overvoltage.
| Series | Nominal current, А | Nominal voltage, V | Connection | EMC at frequency, Hz | Documentation | ||
| B84103 | 1 … 6 | 250 AC/DC | TT/TN |
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| Ordering Code | Nominal current | Nominal Capacitance, CR |
Nominal inductance, LR |
leakage current, mА |
| B84103S0001A010 | 1 А | 0.33 µF (X2) + 2×10 nF (Y2) | 2×9 mH + 2×270 µH | < 1 |
| B84103S0001A030 | 3 А | 0.33 мкФ (X2) + 2×10 nF (Y2) | 2×1.5 mH + 2×22 µH | < 1 |
| B84103S0001A060 | 6 А | 0.33µH (X2)+2×10 nF (Y2) | 2×0.47 mH + 2×8 мµH | < 1 |
EMC Filters for genral purposes. Series B84110A
| Series | Nominal current, А | Nominal voltage, V | Connection | Interference suppression, Hz | Documentation | ||
| B84110A | 0.5 … 6 | 250 AC/DC | TT/TN |
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| Orderingn code | Nominal current | Nominal capacitance, CR |
Nominal inductance , LR |
Leakge current, mА |
| B84110A0000A005 | 0.5 А | 0.25 µF (X2) + 2×4.7 nF (Y2) | 2 × 39 mH | < 0.5 |
| B84110A0000A010 | 1 А | 2 × 10 mH | < 0.5 | |
| B84110A0000A020 | 2 А | 2 × 5.6 mH | < 0.5 | |
| B84110A0000A040 | 4 А | 2 × 2.7 mH | < 0.5 | |
| B84110A0000A060 | 6 А | 2 × 1.9mH | < 0.5 |
EMC-filters. Series B84110B
| Series | Nominal current, А | Nominal voltage, V | Connection | Interference suppression, Hz | Documentation | ||
| B84110B | 1.4 | 250 AC/DC | TT/TN |
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| Ordering code | Nominal current | Nominal capacitance, CR |
Nominal Inductance, LR |
| B84110B0000A014 | 1.4 А | 2 × 0.15 µF (X2) | 2 × 27 mH |
EMC Filters B84771, B84773, B84776
| Series | Nominal current, А | Nominal voltage, V | Connection | EMI suppression at frequencies, Hz | Documentation | ||
| B84771 | 1 … 20 | 250 AC/DC | TT/TN |
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| B84773 | 1 … 10 |
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| B84776 |
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EMC-Filters for general purposes B84771
EMC-filters B84773
EMC-filters B84776
3-line Filters B84143
3-line filters B84143 are characterised by compact sizes? reliability and high level of EMC suppression. The performances with and without neutral line are also possible. 3-line filters are suitable for working at AC voltage 440...760 V (AC) and values of current 8...180A (Depending on series). These components find a wide application in industrial equipment, converters of solar energy, medical technique, frequency converters and power supplies. | Series | Nominal current, А | Nominal voltage, V | Connection | Interferences at frequencies, Hz | Documentation | ||
| B84143A | 8 … 180 | 440...760 AC | TT/TN |
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| Ordering code | Nominal current | Drawing | Leakage current, mА | Nominal voltage, V AC | Documentation | |||
| B84143A*R000 | ||||||||
| B84143A0008R000 | 8 |  |
0.224 | 480/275 |
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| B84143A0012R000 | 12 | 0.224 | ||||||
| B84143A0016R000 | 16 | 0.224 | ||||||
| B84143A0025R000 | 25 | 0.418 | ||||||
| B84143A0036R000 | 36 | 4.7 | ||||||
| B84143A0050R000 | 50 | 1.56 | ||||||
| B84143A0050R000 | 80 | 2.73 | ||||||
| B84143A0120R000 | 120 | 3.3 | ||||||
| B84143A0120R000 | 150 | 3.3 | ||||||
| B84143A0180R000 | 180 | 2.73 | ||||||
| Ordering code | Nominal current | Drawing | Leakage current, mА | Nominal voltage, V AC | Documentation | |||
| B84143A*R105 | ||||||||
| B84143A0008R105 | 8 |  |
4.1 | 520/300 |
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| B84143A0016R105 | 16 | 4.1 | ||||||
| B84143A0025R105 | 25 | 4.7 | ||||||
| B84143A0036R105 | 36 | 0.418 | ||||||
| B84143A0066R105 | 66 | 4.7 | ||||||
| B84143A090R105 | 90 | 5.0 | ||||||
| B84143A0120R105 | 120 | 5.0 | ||||||
| B84143A0120R000 | 150 | 3.3 | ||||||
| B84143A0150R105 | 150 | 5.0 | ||||||
| ordering code | Nominal current | Drawing | Leakage current, mА | Nominal voltage, V AC | Documentation | |||
| Series B84143A*A166 | ||||||||
| B84143A0010A166 | 10 |  |
3.1 | 440/250 |
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| B84143A0020A166 | 20 | 3.1 | ||||||
| B84143A0035A166 | 35 | 5.0 | 520/300 | |||||
| Ordering code | Nominal current | Drawing | leakge current, mА | Nominal voltage, V AC | Documentation | |||
| Серия B84143A*R106 | ||||||||
| B84143A0010R106 | 10 |  |
3.1 | 520/300 |
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| B84143A0020R106 | 20 | 3.1 | ||||||
| B84143A0035R106 | 35 | 3.4 | ||||||
| B84143A0050R106 | 50 | 3.4 | ||||||
| B84143A0065R106 | 65 | 3.4 | ||||||
| B84143A0080R106 | 80 | 3.4 | ||||||
| B84143A0100R106 | 100 | 3.4 | ||||||
| Код заказа | Номинальный ток | Изображение | Ток утечки, мА | Номинальное напряжение, V AC | Документация | |||
| Серия B84143A*R106 | ||||||||
| B84143A0025R021 | 25 |  |
2.39 | 760/440 |
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| B84143A0036R021 | 36 | 2.39 | ||||||
| B84143A0050R021 | 50 | 2.39 | ||||||
| B84143A0080R021 | 80 | 4.2 | ||||||
| B84143A0120R021 | 120 | 4.2 | ||||||
| B84143A0150R021 | 150 | 4.2 | ||||||
| B84143A0180R021 | 180 | 4.2 | ||||||
