Cathode Filter Entaron FC 4 (Right Side Inlet)


  • Cathode filters are preventing irreversible damage to the catalyst of fuel cells.
  • This variant has a right side inlet
  • Enhanced adsorption of Toluene, n-Butane, Sulfur dioxide (SO2), Nitrogen oxides (NOx) and Ammonia (NH3)
  • Optimized air flow
  • Flexible housing
  • Easy service
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Cathode filter Entaron FC 4

  • The adsorption of critical gases from the cathode air can cause irreversible damage to the catalyst of fuel cells that leads to a loss of performance.
  • The ENTARON FC 4 cathode air cleaner extends the service life of the fuel cell system by reliably protecting the catalyst from these gases.
  • It also protects the system from channel blocking and wear by separating particles from the cathode air.

Key benefits

  • Harmful gases are efficiently removed from the intake air, for example sulfur dioxide (SO2), nitrogen oxides (NOx) and ammonia (NH3)
  • Air flow optimized system for low pressure loss and best air mass flow
  • Flexible design options depending on customer needs
  • Option to integrate further functions like sensors and acoustic measures
  • Compact Housing Concept

Key features

  • Well balanced gas adsorption performance for various gases due to in-house blended activated carbon media
  • Increased adsorption power density utilizing an award-winning wound layer element design
  • Optimized differential pressure while boasting advanced gas removal capacity

Operating parameters

  • Efficiency of more than 80% @0.5 μm (100 m³/h) and more than 98% @ 5.0 μm (100 m³/h)
  • Differential pressure: 1.3 mbar @ 50 m³/h; 4.0 mbar @ 100 m³/h; 7.9 mbar @ 150 m³/h; 12.8 mbar @ 200 m³/h
  • Vertical and horizontal mounting position possible
  • Protection against water
  • Front servicing with comfort fasteners



Application areas

  • Optional use for mobile or stationary fuel cell applications
  • Protection of the cathode air path

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  • MANN+HUMMEL is able to use its many years of experience in the area of filtration to meet the requirements for future mobility.
  • Fill out the contact form and contact us today!
Dimensions33 cm
Diameter (in mm)

Cut-Off Particle Size (μm)


Pressure Drop (in bar)

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Manufacturing Readiness (MRL)

Technology Readiness (TRL)


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Mann+Hummel Entaron FC datasheet

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      MANN+HUMMEL is a leading global company in filtration technology. Under its two business units Transportation and Life Sciences & Environment, the Ludwigsburg-based Group develops intelligent solutions that enable cleaner mobility, cleaner air and cleaner water. Thus, the company makes an important contribution to clean earth and the sustainable use of limited resources. In 2020, over 23,000 employees at more than 80 locations generated a turnover of EUR 4.2 billion. We are your perfect partner to develop and globally scale your fuel cell business as we can leverage more than 80 years of know-how in filtration. You can find the products of MANN+HUMMEL listed on Hyfindr and also in our E-Mobility Onlineshop.


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