This product is shortly to be EOL’d and is therefore not recommended for new designs. Existing customers should contact their local sales office for more information.

Kinetic Technologies recommends the KTA1550 for all new designs.

Dual-channel Active Choke for EMI Suppression w/ Integrated ESD Protection


  • Enables system designers to comply with:
    • CISPR22 and FCC Part 15, Class B requirements for Radiated and Conducted Emissions
    • IEC 61000-4-3 requirements for Radiated and Conducted Immunity, Level 3 or higher
    • IEC 61000-4-2 ESD (Air Discharge) of ±25kV
    • IEC 61000-4-2 ESD (Contact Discharge) of ±12kV
    • Cable Discharge Event (CDE) of ±12kV
  • Provides up to 10dB of additional common mode noise suppression over the frequency of 1MHz to 125MHz when used with Ethernet magnetics
  • Robust built-in ESD suppressors protect the Ethernet PHY and improve system ESD performance
  • JESD22-A114, ESD, HBM of ±8kV
  • Interfaces to standard Ethernet transformers and 10/100/1000 Ethernet PHYs
  • Uses a single standard power rail (3.3V or 2.5V)
  • Open drain output stage that can be biased from 1.8V to 3.3V using transformer center-tap supply as needed based on choice of Ethernet PHY
  • Flow-through routing for ease of board layout
  • Typical power consumption of 90mW
  • Low power mode available
  • Industrial temperature range (-40°C to +85°C)


  • Ethernet systems requiring additional CM suppression to meet EMC Class B emissions or higher EMI immunity requirements and ESD protection
  • POE and Non-PoE Ethernet systems
  • VoIP Phones, IP Cameras, WAPs, Routers, Switches
  • Set Top Boxes, Networked Printers and Appliances, Desktop and Laptop Computers

Key Electrical Specifications

Vin(Min) Vin(Max) CISPR22 and FCC Part 15 IEC 61000-4-3 requirements for Radiated and
Conducted Immunity
IEC 61000-4-2 ESD (Air Discharge) IEC 61000-4-2 ESD (Contact Discharge) Cable Discharge Event (CDE) Package
2.17V or 3.13V 2.63V or 3.47V  Class B, for Radiated and Conducted Emissions Level 3 or higher ±25kV ±12kV ±12kV QSOP-16L (SOIC narrow)

Typical Application Diagram