EMI Suppression Filters (EMC and Noise Suppression)Noise Suppression (EMI/EMC Suppression) for Automotive Devices

Numerous achievements in automotive devices Murata's noise suppression solutions

Starting with the commercialization of the three-terminal capacitor as the world's first dedicated noise suppression product, Murata Manufacturing Co., Ltd. has earned the trust of customers over many years by developing various noise suppression products, helping to disseminate noise suppression technology, and providing noise suppression services.

This page introduces Murata Manufacturing's diverse knowhow and achievements in noise suppression, as well as noise suppression products such as ferrite beads, LC composite filters, and common mode choke coils which are all well suited to automotive devices.

Noise suppression products Reference block diagram / Part adoption example

Murata's noise suppression products have been adopted for use in various automotive applications, from ABS and ECU automotive powertrains/safety equipment to car audio, car navigation system, and other automotive infotainment devices.
Please refer to the following typical example of target products where these are to be used for several application of automotive devices. 
These are just a little bit of representative adoption example and application devices which are now aiming to focus. To check the reference block diagram and a part adoption example, please click the following application name.

车载应用ADAS的电路框图例

Reference block diagram / Part adoption example Sample

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Applications arget area
In-Vehicle Infotainment Differential signal lines
Single ended signal lines
Analog/digital video lines
Analog/digital audio lines
Power lines
ADAS
TPMS/RKE
xEV Power Control Unit

Broad lineup of automotive noise suppression components

Automotive ferrite beads

Compact noise suppression filters that do not require a ground connection. Optimal for minor noise suppression.

Check out the lineup.

車載用フェライトビーズ

Automotive three-terminal capacitors

Capacitors with a three-terminal structure developed for noise suppression. Noise suppression performance that is superior to ferrite beads.

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車載用3端子コンデンサ

Automotive common mode choke coils

Filters that efficiently suppress the problem of common mode noise which easily occurs in cables. Optimal for noise suppression in high speed differential transmission lines.

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車載用コモンモードチョークコイル

Automotive LC composite filters

EMI suppression filters which combine a capacitor with an inductor. Little impact on the signal waveform in high speed signal lines.

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車載用LC複合型フィルタ

Automotive filters with a varistor function

EMI suppression filters which combine a capacitor with a varistor. Able to simultaneously absorb surge voltages and suppress EMI noise.

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車載用バリスタ機能付きフィルタ

Automotive block-type filters

High performance noise filter that supports large currents and provides noise suppression across a broad frequency band in one product.

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車載用ブロックタイプフィルタ

Automotive impedance filters

Filters that suppress noise at a specific frequency in audio lines, etc.

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車載用インピーダンス型フィルタ

Technical information and email newsletter

The power circuits use a switching system that increases efficiency, but is also a source of problematic noise. Noise suppression measures for the power circuits (DC-DC converter) of devices mounted in vehicles are described below.

Introduce noise countermeasure example for CAN line which is used for automotive communication network.

車載LAN用コモンモードチョークコイルによるCANのノイズ対策

There are many kinds of problematic noise that are emitted from the devices installed in vehicles.
The examples of the actions taken to suppress noise described here deal with the noise that is radiated from the USB signal cables.

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