OverviewAll applicationsCategoryE-MobilityApplicationOn-Board Charger

On-Board Charger

Component selectionDesign tips


E-vehicles typically are offering two ways of recharging their batteries.

  1. High-voltage DC charging systems promise very short charging times. But these also require a very powerful power connection, which many households and businesses do not have.

  1. More widespread are 3-phase AC connections, which are often also available to private households.

Alternating current (AC) firstly has to be converted to direct current (DC) on board of an electric vehicle in order to charge the vehicle's battery. Power conversion brings up challenges in power handling and EMC.

Würth Elektronik is offering a growing range of automotive-certified products matching the following industry standards:

  • AEC-Q 200 qualified products
  • IATF 16949 certified production facilities
  • PPAP Level 1-3
  • IMDS, etc.

Top Sellers for On-Board Charger

WE-PDA SMT Shielded Power Inductor


  • Magnetically shielded version
  • High Saturation currents up to 23 A
  • Very low self-losses at high switching frequency's
  • Wide inductance spectrum available at all sizes
  • Operating Temperature -40 °C up to +125 °C

WE-MAIA SMT Power Inductor


  • Magnetic iron alloy
  • Compact design
  • Magnetically shielded
  • Operating temperature range: -40°C up to +125°C

WE-CBA SMT EMI Suppression Ferrite Bead


  • Reliable Ni-Sn electrodes
  • High rated current up to 5 A
  • Operating temperature: –55 ºC to +125 ºC
  • Automotive approved

WE-AEFA Axial EMI Suppression Ferrite


  • Ferrite core made of NiZn
  • Many different types for the best possible interference suppression
  • Operating temperature: -55°C up to +150°C
  • Automotive approved

EV EMI suppression

EMC noise cancellation for new EV & HEV applications

The rising electrification of motor vehicles is inevitably accompanied by an increase in electromagnetic interference. The use of cable ferrites can significantly reduce these in electric and hybrid vehicles, whether interference signals on lines or electromagnetic field coupling effects. High-performance inductive materials in cable ferrites significantly improve EMC performance. Standard ferrite cable core suppression elements in axial as well in toroidal form are suitable for a wide range of applications with medium and high frequencies. For higher frequencies, these contain a magnesium component. A very wide frequency range is covered by cable ferrites with a new nanocrystalline material (NC).

Applications matrix

We offer the complete frequency range

Würth Elektronik cable ferrites are designed to work in all different frequency ranges with best attenuation.

It is essential for the following automotive applications:

  • In EMI suppression against Inverter spikes
  • Attenuate EMI noise induced by the rotor of the electric motor
  • Minimize NVH (Noise vibrations harshness) in the EMC spectrum at power train
  • Special EMI suppression for the junction box interconnections


Würth Elektronik Webinar: EMC components for automotive application


Würth Elektronik Webinar: Automotive requirements to Passive Components – AEC-Q200