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A power line filter is a type of [passive component](/web/c/passive-components/) that creates an electronic filter to deliver appropriate frequency characteristics to electrical circuits. Power line filters connect the electronic device with an external line to reduce conducted frequencies like radio frequencies (RFI) or electromagnetic interference (EMI) between the equipment and the connecting power line. This prevents any degradation in the circuit's performance.

RS offer an extensive range of high-quality power line filters from leading brands including Schaffner, Roxburgh EMC, Murata, Schurter and of course RS PRO.

### What are power line filters used for?

Power line filters are useful in emission reduction in switched-mode power supplies or machinery producing steam, smoke or carbon dioxide. These filters are also necessary to decrease levels of electromagnetic interference which may cause undesired behaviour in radio transmission equipment and nuclear operations.

### Types of power line filters

Power line filters can be used in single-phase, three-phase or DC (direct current) power applications, depending on the equipment in question. Electric and electronic devices like switched-mode power supplies, motor controllers, induction cooking and food service equipment make use of single-phase filters. Three-phase filters are common in frequency converters, motor drives, and machine tools. DC filters are typically found in cell phones, flat-screen TVs and electric or hybrid vehicles.



Shop our range of Power Line Filters supplies & accessories. Free Next Day Delivery. Browse our latest Power Line Filters offers.

Power Line Filters | AC DC Line Noise Filter | RS

Power Line Filters

Buy from our selection of Power Line Filters from Schaffner. At RS, we strive to give you the best offers from our supplier and to promptly deliver in the shortest time.

Schaffner Power Line Filters | RS

Browse Schaffner FN2010 AC/DC EMI filters. See FN2010B medical equipment type, single-phase power line filters suppressing EMI. Free Next Day Delivery.

EMI Filter | AC/DC | Schaffner Mains Filter | RS

Schaffner FN2010 are general purpose ac/dc EMI filters for chassis mounting. With voltage ratings of 250 Vac, 50/60Hz and 250 Vdc that has an operating frequency of up to 400Hz. The FN2010B version is compliant with medical equipment standards. These filters feature enhanced performance and dc optimisation, providing higher attenuation in compact housing. The Schaffner FN2010 filters are standard performance single-phase power line filters that are suitable for a wide range of applications including electrical and electronic equipment, consumer goods, household appliances, medical devices, office automation, and datacom equipment.

Browse Schaffner FN2020 mains filters for EMC/EMI. Shop single-phase FN2020 line filters reducing EMI in both AC and DC power. Free Next Day Delivery.

EMI Filter | AC/DC | Schaffner | Mains Filter | RS

The FN2020 single-phase filters by Schaffner are essential components designed to reduce electromagnetic interference in both AC and DC power systems. These EMI filters are chassis-mounted and range from 1 to 30A rated currents with 250 Vac, 50/60 Hz and 250 Vdc that have an operating frequency of up to 400 Hz. They offer high attenuation of differential-mode noise. Schaffner FN2020 filters ensure reliable operation across various applications, including electrical and electronic equipment, consumer goods, household appliances, medical devices, office automation, and datacom equipment. See also the Schaffner two-stage filter versions (FN2060, FN2070 series) available for environments with higher noise levels.

Buy Schaffner FN2030, high attenuation mains filters for EMC/EMI. AC/DC line filters, medical (B) and overvoltage protection (Z). Free Next Day Delivery.

AC/DC | EMI Filter | Mains Filter | Schaffner Filter | RS

Single-phase Schaffner FN2030 EMI Filters are designed to significantly reduce electromagnetic interference in AC and DC power systems. These line filters current ratings range from 1 to 30A, with voltage ratings of 250 Vac, 50/60Hz and 250 Vdc with an operating frequency of up to 400 Hz. The FN2030 AC/DC EMI Filters offer high attenuation performance and a compact chassis mount design. These Schaffner FN2030 noise filters find applications in a wide range of industries including electrical and electronic equipment, consumer goods, household appliances, medical devices, electronic data processing, office automation, datacom equipment, and various noisy environments requiring high filter performance. Schaffner offer FN2030B versions that are compliant with medical equipment standards as well as overvoltage protection (Z type) for added protection.

Browse Schaffner FN350, mains filters for motor drives. Single-phase EMC/RFI noise filters, applications include power supplies (SMPS). Free Next Day Delivery.

EMC/RFI Filter | Motor Drives | Single-Phase | RS

Introducing the Schaffner FN350 compact EMC/RFI filter for motor drives, designed to enhance the performance and safety of single-phase motor drive applications. With a single-phase operating voltage of 250 Vac and an operating frequency range from DC to 400 Hz, this filter provides efficient electromagnetic compatibility (EMC) and radio frequency interference (RFI) filtering. This EMC filter meets EN 55011/14/22 standards and compliance with IEC 60950, it ensures reliable operation in various industrial environments. Typical applications include single-phase motor drives, automation equipment, power supplies (SMPS), office equipment, and testing and measurement equipment.

Browse Schaffner 3 Phase, 3 Phase + Neutral filters for EMI, EMC and RFI noise filtration.  Shop three-phase power line filters. Free Next Day Delivery.

3 Phase Filter | EMI, EMC, RFI | 3 Phase + Neutral | RS

Explore our range of Schaffner 3 Phase EMC/RFI and 3 Phase + Neutral EMC/EMI Filters. RFI Filters for motor drives and industrial inverter applications, along with EMI general-purpose line filters. High-performing noise filters featuring high differential and common-mode attenuation as well as low leakage current types. All in a compact chassis mount or DIN rail versions. Maximum continuous operating voltages of 3x 440/250 Vac or 3x 520/300 Vac with operating frequency DC to 60Hz or 400Hz. See the following Schaffner series for a three-phase motor to suit your requirements offer includes Schaffner FN351, FN355, FN3025, FN3026, FN3120, FN3256, FN3258, FN3270, FN3280, FN3287, FN3288, FN3311 and FN356.

Browse 3 Phase + Neutral compact line filter for Industrial Machinery. Shop Schaffner FN3256H EMC/EMI power line filters. Free Next Day Delivery.

Schaffner 3 Phase + Neutral | EMI Line Filter | RS

Compact 3-phase filters with neutral FN3256 are designed for industrial machinery, machine tools, and process automation systems. The Schaffner FN3256 line filters offer a voltage range of 3x 520/300 Vac (with 480 Vac +10% possible) and operate within a frequency range from DC to 60Hz. Offering high attenuation performance while maintaining low leakage current levels, making them suitable for use in select medical devices. These filters adhere to the machine tool standard EN 50370-1 and enhance immunity when connected directly to the mains input.

Browse Schaffner 3 Phase filters, compact EMC/RFI filters for industrial applications. Buy FN3270H RFI noise filter for motor drives. Free Next Day Delivery.

3 Phase Filter | Schaffner RFI Filter | Motor Drive | RS

Schaffner FN3270H 3-Phase filters are compact EMC/RFI filters designed for industrial motor drive applications. Operating at a maximum continuous voltage of 3 x 520/300 Vac (with 480 Vac +10% possible) and a frequency range from DC to 60Hz, these filters offer attenuation performance in line with EN 61800-3/A11 standards. Their design minimises mounting space requirements in installations and cabinets, while touch-safe terminal blocks (for 10-100A) ensure safety during installation. Applications for variable speed electrical power drive systems, including industrial applications such as frequency inverters, motor drives and servo drives.

Browse Schaffner EMI filters FN2200 & high current FN2211 and FN2210 for PV inverters. Shop Schaffner DC Filters for DC motor drives. Free Next Day Delivery.

Schaffner DC filter | EMC/EMI | PV Inverter | RS

Introducing Schaffner DC filters (EMC/EMI Filter) for PV inverters FN2200 and high current FN2211 and FN2210. The Schaffner EMI filters are designed for PV inverters, controlling conducted emissions on the solar panel side, and reducing interference radiation. Protects solar panels from premature aging due to HF stray and leakage currents. Ideal for PV inverters, but also suitable for various DC applications UPS, DC motor drives, and DC quick chargers within specifications.

Shop TE Connectivity Corcom R filters, two stage EMC/RFI line filters. Buy single phase Corcom line filters for noisy RFI environments. Free Next Day Delivery.

Corcom R | EMC | RFI Filter | Corcom Line Filter | RS

Introducing the two-stage general purpose RFI power line filter with a dual T section design for premium performance, featuring FASTON connections. Explore the TE Connectivity Corcom R series, single-phase filters are ideal for low impedance loads in noisy RFI environments. The Corcom RFI Filters effectively manage pulsed, continuous, and intermittent interference.

Browse TE Connectivity Corcom K filters, RFI power line filters. Shop single phase Corcom line filters for high impedance loads. Free Next Day Delivery.

Corcom K | RFI Filter | TE Connectivity Corcom Filter | RS

Explore the TE Connectivity Corcom K Series, general purpose RFI power line filters designed for high impedance loads, particularly in applications with pulsed, continuous, and intermittent RFI interference. The Corcom line filters are single phase RFI filters from the Corcom K Series, featuring Faston or threaded bolt terminals.

Shop Corcom B filters, RFI line filters. Buy TE Connectivity, single phase Corcom line filters, high impedance loads at low current. Free Next Day Delivery.

TE Connectivity Corcom B | RFI Filter | Corcom Filter | RS

Introducing TE Connectivity Corcom B series. Single phase filters for general purpose RFI Power Line filters designed for high impedance loads at low current. Featuring a small size with a range of termination options like Faston, wire lead, or threaded bolt terminals. Complies with VDE requirements for low leakage current, suitable for portable equipment and non-patient medical equipment.

Browse Cosel Noise filters, power line filter also known as EMI, EMC/RFI filters. Electrical noise filters,reduce unwanted noise. Free Next Day Delivery.

Cosel Noise filter | EMC/RFI Filter | EMI Filter | RS

Explore Cosel's power line filters designed to reduce electromagnetic interference (EMI) and radio frequency interference (RFI). Cosel noise filters are available in single phase, 3 phase or DC power in panel mount or DIN rail version.

Browse EMI filters, 10A current rated offering EMC,RFI power line filters. Buy EMI 10A mains filters, 3-Phase and DC filters. Free Next Day Delivery.

EMI filter 10A | EMC | Line Filter | EMI Mains filter | RS

Passive components, 10A EMI (electromagnetic interference) or RFI (radio frequency interference) power line filters are designed to suppress conducted interference within your electrical environment. EMI, EMC/RFI are forms of unwanted electrical noise that can disrupt the performance of your electrical and electronic equipment. EMI filter, 10A is intended for voltages commonly found in both mains and DC systems. The AC power line filters offer single phase and 3 phase EMI filters in either single or two-stage configurations, these compact EMC devices can be chassis mounted, DIN rail and more. Their applications include power supplies, inverters, motor drives, and industrial equipment. Some families can offer medical versions that meet medical approvals. See our available brands such as RS Pro, Roxburgh EMC, Cosel, TDK-Lambda/EPCOS, and many others.

Browse 20A EMI filters, power line filters for AC single phase, 3 phase, 3P+N and DC filter applications. Buy EMI 20A, noise filters. Free Next Day Delivery.

EMI filter 20A | EMC | 3 Phase EMI Filter | RS

RS EMI Filters, offer a solution to unwanted electrical noise within our 20A Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI) power line filters range. Our passive EMI filters are designed to suppress conducted interference within your electrical environment, these filters provide reliable protection against disruptions in the performance of your electrical and electronic equipment. With options for various voltages and applications, including single-phase and 3-phase setups. The EMI filter 20A can be found in many applications including power supplies, inverters, motor drives, and industrial equipment. Suppliers include Schaffner, EPCOS, Shurter, WURTH Elektronik and TE Connectivity.

Browse EMI 6A filters, power line filters for mains filtering. Buy 6A EMI Filters, suppress unwanted interference with DC filters. Free Next Day Delivery.

EMI filter | 6A | Mains Filter | Line Filter | RS

Our 6A EMI filters are specifically designed to address interferences, for voltages found in both mains and DC systems. Choose our EMI filter 6A to ensure the uninterrupted and efficient operation of your electronic equipment. With various voltages options and applications, including single-phase and 3-phase configurations. Our EMI, EMC/RFI filters provide an ideal solution to alleviate interference and enhance the overall performance of your systems. Supplied by leading brands such as Schaffner, EPCOS, TE Connectivity and many more.

Browse 16A EMI filters, power line filters for 3 phase, 3P+N and mains filters. Shop DC filters to suppress EMI interference. Free Next Day Delivery.

EMI filter | 16A Noise Filter | 3 Phase | Power Filter| RS

Explore our EMI filters 16A range, from chassis mount to DIN rail these passive components provide a solution to unwanted electrical noise against EMI and RFI. With a range of voltages and filter performances that include high differential and common-mode attenuation. The 16A EMI, EMC/RFI power line filters offer protection against disruptions in the performance of your equipment. With suppliers such as EPCOS/TDK, Schaffner, United Automation, and more provide a solution to suppress the conducted interference within your electrical applications.

Browse EPCOS B84112, single phase power line filters 250 V ac/dc. Shop EMC filters with SIFI-G and SIFI-B design, includes medical type. Free Next Day Delivery.

B84112 | EPCOS EMC Filter | SIFI-G | SIFI-B | RS

Improve the performance of your single phase systems with our EPCOS power line filters with voltage ratings of 250 V ac/dc. Our 2-line B84112G EMC filters featuring the SIFI-G design for enhanced insertion loss across a current rating range from 2A to 36A. For medical equipment applications, see the specialised B84112G0000M version which ensures optimal performance. The B84112B EMC filters, also 2-line version with SIFI-B for enhanced insertion loss capabilities. With current ratings from 2A to 20A in our current range. Both EMC filters from the B84112 series offer easy installation, a compact design, and an optimised leakage current. These filters are ideal for various applications, including switch-mode power supplies, industrial electronics, data systems, telecommunications, and DC applications.

Browse EPCOS B84111, single phase 2- line EMC filters for ac/dc & medical applications also. B84111 filters with SIFI-A/SIFI-F design. Free Next Day Delivery.

B84111 | EPCOS EMC Filter | SIFI-A | SIFI-F | RS

EPCOS EMC power line filters are designed for single phase systems with a 250 Vac/dc voltage rating giving reliability and performance across various industries. Our B84111A EMC filters feature 2-line filters (SIFI-A) ensuring normal insertion loss, catering to a wide current range from 1A to 20A, and feature an optimised leakage current of less than 0.5 mA. The B84111F EMC filters covers 3 to 36A current ratings, employing SIFI-F technology also for normal insertion loss. The B84111 has an easy-to-use and compact design comprised of standard versions (B84111F0000B/G) or the medical version (B84111F0000M) designed for applications requiring low leakage current in EMC Filters. These filters find applications in many settings including switch-mode power supplies, industrial electronics, data systems, telecommunications, and DC applications.

Browse Schaffner mains filters FN2060, high CM and DM attenuation. Buy AC/DC, EMI power line filters FN2060B for medical equipment. Free Next Day Delivery.

Mains filter | AC/DC EMI Filter | Two Stage | RS

Schaffner FN2060 single-phase AC/DC EMI filters are designed to minimise electromagnetic interference. Their voltage ratings are 250 Vac, 50/60Hz and 250 Vdc which provides an operating frequency of up to 400 Hz. These two-stage filters are chassis mounted and range from 1 to 30 Amps and offer high attenuation of both differential and common-mode noise, ensuring reliable performance across various applications. Schaffner FN2060B meets medical equipment standards and is ideal for noisy environments.

Browse Schaffner FN2070 two stage single-phase EMC/ EMI Filters. Buy AC/DC power line filters with high CM, DM & HF Attenuation. Free Next Day Delivery.

AC/DC EMI Filter | Single-Phase | Two Stage | RS

Schaffner FN2070 single-phase filters feature a two-stage design. The AC/DC EMI filters are engineered to deliver high differential and common mode attenuation, along with high-frequency attenuation, making them ideal for a range of applications. With voltage ratings of 250 Vac, 50/60Hz and 250 Vdc that have an operating frequency of up to 400 Hz. Along with rated currents ranging from 1 to 36 A and easy chassis mounting. Schaffner EMI filters offer versatile solutions for noisy applications requiring superior filtering capabilities, including single-phase motor drives. FN2070 line filters can be found in electrical and electronic equipment, consumer goods, household appliances, building automation, industrial machinery, electronic data processing systems, office automation, and data communication equipment.

Shop two stage FN2080 AC/DC EMC/EMI Filters by Schaffner. Browse our single-phase noise filters with high CM, DM & LF Attenuation. Free Next Day Delivery.

Schaffner AC/DC | Mains EMI Filter | Two Stage | RS

Single-phase filters FN2080 by Schaffner are advanced multi-stage AC/DC EMI filters for attenuation in low frequency ranges, high differential as well as common mode. With a rated voltage of 250 Vac, 50/60Hz and 250 Vdc, and an operating frequency spanning from DC to 400 Hz, these filters are versatile solutions for a wide array of applications. Designed to be chassis mounted, the Schaffner FN2080 series ensures efficient installation. Featuring chokes with high saturation resistance and excellent thermal characteristics. These high-performing FN2080 EMI line filters work in applications across electrical and electronic equipment, lighting installations benefiting from high differential mode inductance, consumer goods, household appliances, building automation, industrial machinery, electronic data processing systems, office automation, data communication equipment, and various noisy environments that require more filtering performance.

Buy Schaffner FN2090, two stage mains filters, high CM & DM attenuation. EMI AC/DC line filters, medical & overvoltage option available. Free Next Day Delivery.

EMI Filter | Two Stage Mains Filter | AC/DC | RS

Two Stage ac/dc EMI Filters FN2090 are very high performing single-phase filters made by Schaffner they offer outstanding attenuation performance in a compact design, and chassis mounting makes them versatile solutions for a range of applications. With a rated voltage of 250 Vac, 50/60Hz and 250 Vdc, and an operating frequency from DC to 400 Hz. Available in rated currents from 1 to 30A, the two-stage line filter design ensures very high levels of both differential and common-mode attenuation. The Schaffner FN2090 range also includes the FN2090B type meeting medical equipment standards (IEC 60601-1) as well as overvoltage protection (Z type). Suitable for electrical and electronic equipment, consumer goods, household appliances, building automation, industrial machinery, medical devices, electronic data processing systems, office automation, and various noisy environments requiring high filter performance

Browse Schaffner FN3280H, 3 Phase + neutral EMI filters for industrial machinery. Shop our compact EMI Power line filters 8 to 64A. Free Next Day Delivery.

Schaffner 3 Phase + Neutral | Power Line Filter | EMI | RS

High performing Schaffner FN3280H 3-Phase filter with neutral for machinery and industrial equipment. Maximum continuous operating voltage 3x 520/300 Vac (480 Vac + 10% possible) with an operating frequency DC to 60Hz. EMC/EMI, FN3280H line filters by Schaffner range from 8A up to 64A. Their compact and space-saving design is optimised for industrial machinery, offering exceptional attenuation alongside low leakage current, making it suitable for machines operating in mixed or domestic environments (Class A/B). Serving as a mains input filter for three phases and neutral line. Typical applications also include process automation systems, noisy power supplies, renewable energy applications and high-power office equipment.

Cosel Noise Filter

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