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
597.7 @ 0.19 MHz
301.9 @ 0.65 MHz
43.32 @ 1.2 MHz
inductance1 inductance Irms2
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 maxi-
3. DCR is specified per winding.
4. Isolation (hipot) measured for one minute.
5. Electrical specifications at 25°C.
Core material Ferrite
Terminations RoHS compliant tin-silver over tin over copper.
Weight 100 – 113 g
Ambient temperature –40°C to +85°C
Storage temperature Component: –40°C to +85°C.
Tray packaging: –40°C to +80°C
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
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.
US +1-847-639-6400 email@example.com
UK +44-1236-730595 firstname.lastname@example.org
Taiwan +886-2-2264 3646 email@example.com
China +86-21-6218 8074 firstname.lastname@example.org
Singapore + 65-6484 8412 email@example.com
Document 144-1 Revised 09/13/17
© Coilcraft Inc. 2017
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.