Coilcraft Combination Line Filter Choke
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Combination Line Filter Choke

  • Combines common and differential mode filtering in a single component
  • Can eliminate two extra filter chokes compared to standard common mode choke
  • Special windings and materials provides better filtering performance than common mode chokes or a single winding inductor alone
  • Refer to Designing Common Mode Filters for design guidance.
  • RoHS-compliant. Tin-silver over tin over copper terminations.


Part number
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Common mode
max (kOhms)
Inductance typ1 Irms2
DCR max3
mode (mH)
mode (µH)
P3717-AL 597.7 @ 0.19 MHz 25.0 1000 3 0.30 1500
Q4007-AL 301.9 @ 0.65 MHz 4.5 150 5 0.06 1500
Q4018-AL 43.32 @ 1.2 MHz 1.5 35 10 0.02 1500
1 Inductance measured at 15.75 kHz, 1.0 Vrms, 0 Adc
2 Current that causes a 40°C temperature rise from 25°C ambient. This information is for reference only and does not represent absolute maximum ratings.
3 DCR at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4 Isolation (hipot) measured for one minute
5 Ambient temperature range: −40°C to +85°C
6 Storage temperature range: Component: −40°C to +85°C
Packaging trays: −40°C to +80°C
7 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.

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Updated: April 16, 2018