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Document 144-1
Common and
CombinationLineFilterChokes Differential Mode
This series of chokes is intended for use in AC line filters
for switching power supplies.They combine common and
differential mode filtering in a single component.
By using these parts, designers can eliminate two extra fil-
ter chokes compared to a standard common mode choke.
The unique combination of special windings and materials
provides much better filtering performance than either a
common mode choke or a single winding inductor alone.
The differential filtering frequency response is designed
to provide filtering at higher frequencies while still allow-
ing the AC line power to pass through without loss. This
characteristic is demonstrated in the Differential Mode
Attenuation curves.
Common mode
Common mode
Differential mode
inductance
typ (µH)
1
1
2
3
4
Part
number
impedance
inductance
Irms
(A)
DCR max
(Ohms)
Isolation
(Vrms)
max (kOhms)
typ (mH)
P3717-AL
Q4007-AL
Q4018-AL
597.7 @ 0.19 MHz
301.9 @ 0.65 MHz
43.32 @ 1.2 MHz
25.0
4.5
1.5
1000
150
35
3.0
5.0
10
0.30
0.06
0.02
1500
1500
1500
1. Inductance measured at 15.75 kHz, 1.0 Vrms, 0 Adc.
Core material Ferrite
2. Current that causes a 40°C temperature rise from 25°C ambient.This
information is for reference only and does not represent absolute maxi-
mum ratings.
Terminations RoHS compliant tin-silver over tin over copper.
Weight 100 – 113 g
Ambient temperature –40°C to +85°C
3. DCR is specified per winding.
Storage temperature Component: –40°C to +85°C.
Tray packaging: –40°C to +80°C
4. Isolation (hipot) measured for one minute.
5. Electrical specifications at 25°C.
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Packaging 30 per tray (after 5/09); 16 per tray (prior to 6/09)
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Document 144-1 Revised 07/06/22
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© Coilcraft Inc. 2022
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.