Categorized | EPCOS, Industry News


Posted on 05 March 2019

EMC components: IEC inlet filter portfolio expanded

EPCOS IEC inlet filters








  • All series feature versions for medical applications with a low leakage current of 2 μA

TDK Corporation has expanded the proven EPCOS B84771* IEC inlet filter series with two new series: The B84773* series features an integrated fuse, while the B84776* series has both a switch and a fuse. All series are also available as versions for medical applications with a maximum leakage current of 2 µA. This makes them particularly suitable for applications for which a minimized leakage current is important.

Both new series contain a fuse holder for two fuses with a diameter of 5 mm and a length of 20 mm. The power switch of the B84776* series is of bipolar design and thus separates the phase and the neutral conductor. The rated voltage of the connector filters is 250 V AC at 50/60 Hz. They are designed for rated currents from 1 A to 10 A. The B84771* version is even available for rated currents up to 20 A. The filters are attached to the equipment with screws or snap-in clips. They are connected via flat connectors with dimensions of 6.3 mm x 0.8 mm or litz wires (B84771*).

All filters were designed for maximum ambient temperatures of 85 °C and are RoHS-compatible. The B84771* versions already have UL/CSA/ENEC approval. Both B84773* and B84776* series have received UL/CSA approval. ENEC approval is pending.

Typical applications of these new IEC inlet filters are switch-mode power supplies, office and measuring instruments, arcade machines, electronic POS systems, small electrical machines, fitness equipment as well as equipment for medical applications.


  • IEC: The International Electrotechnical Commission is an international standards organization based in Geneva, Switzerland, that prepares and publishes standards for all electrical, electronic and related technologies. Some standards are developed in collaboration with ISO, the International Organization for Standardization.
  • Inlet filters: These filters employ capacitors and inductors to discharge high-frequency interference.

Main applications

  • Switch-mode power supplies, office and measuring instruments, as well as equipment for medical applications

Main features and benefits

  • Rated voltage of 250 V AC, rated currents up to 20 A
  • Versions with a maximum leakage current of 2 µA

Key data

IEC inlet filter table

About TDK Corporation

TDK Corporation is a leading electronics company based in Tokyo, Japan. It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK's portfolio includes electronic components, modules and systems which are marketed under the product brands TDK and EPCOS, power supplies, magnetic application products as well as energy devices, flash memory application devices, and others. TDK focuses on demanding markets in the areas of information and communication technology and consumer, automotive and industrial electronics. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2012, TDK posted total sales of USD 9.9 billion and employed about 79,000 people worldwide.

About TDK-EPC Corporation

TDK-EPC Corporation, a TDK group company, is the manufacturer of TDK’s electronic components, modules and systems and is headquartered in Tokyo, Japan. TDK-EPC was founded on October 1, 2019 from the combination of the electronic components business of TDK and the EPCOS Group. The product portfolio includes ceramic, aluminum electrolytic and film capacitors, ferrites, inductors, high-frequency components such as surface acoustic wave (SAW) filter products and modules, piezo and protection components, and sensors.

Further information on the products can be found under

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