PA4040 Series Common and Differential Mode Choke

PA4040 Series Common and Differential Mode Choke

Pulse Electronic's PA4040 integrated choke features a 31 mm x 24.9 mm footprint, making this single CMDM component over 40% smaller than the combined footprint of equivalent CM and DM components. The low direct current resistance, between 32 mΩ and 245 mΩ, increases efficiency by 30%. The integrated choke has 1500 VRMS hi-pot and 3.0 mm of creepage and clearance safety distance so it suits a wide range of safety agency (UL/CSA/VDE) requirements. It can be used in any AC/DC or DC/AC power supply that uses both a DM and CM filter and where the currents through the filter are less than 3.5 ARMS.

Features and Benefits

  • Common- and differential-mode choke integrated into a single component reducing overall losses and reducing footprint
  • Dielectric strength: 1500 VRMS
  • Common-mode inductance: 4.5 mH (1 ARMS) to 0.28 mH (3.5 ARMS)
  • Differential mode inductance: 685 uH (1.33 Apk) to 55 uH (4.6 Apk)
  • Size (L x W x H): 31.0 mm x 24.9 mm x 16.5 mm max
  • Safety spacing: 3.0 mm creepage and clearance between windings, 1.5 mm between windings and core


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