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- November 24th 2020 -
Call: 1 (800) 377-3244
We Are Open Monday to Friday From 8 A.M.- 5 P.M., (Pacific Time)
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Ferrite Pot Cores for Inductors and Power Supplies


A kit includes bobbin, screw, washers and other hardware
All are Material #77, u=2000, AL value is given in mH/per 1000 turns.
The Power Ratings listed in the shopping cart below are conservative, based on 20 Khz switching frequency.
CWS Bytemark carries many other types of shaped cores such as EFD, EPD, etc. These can be rated for 100 Khz to 500 Khz.
AL (nH/Square Turn or nH/N2) is the AL value.
L is inductance in nH (nanohenries)
N is the number of turns of a wire
Required turns (N) = square root of (desired 'L' /'AL'), √'L' /'AL', or 1000 turns='mH' /'AL', (square rooted)
CWS ByteMark Part Number is the part number to use to place purchase order. 1 inch = 25.4 mm
O.D. is the outer diameter
I.D. is the inside diameter
HT is the height
Color may vary by material and coating characteristics

•Pot Cores Technical Data and Specifications
• Drawing of Pot Cores in .PDF
•Download Entire Ferrite Specifications and Data sheets in .PDF

Low order fees are charged to total a minimum payment of $25.
Quantity marked in red is subject to availability and prior sales, or back order.
Orders are processed in 2 to 3 business days.
Please call for volume and price inquiries or email

Part Number:

Ex: P-1107-77

P = Pot Core (2 pieces), 11 = Diameter (2 pieces together), 07 = height (2 pieces together),

77 = Ferrite Material Type, G = Gapped (in middle hole)

  Part Number Dimensions AL(nH/N2)
on hand
P-1107-77 11 X 07 mm 1420 mh/1000t 0 $2.50
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P-1408-77 14 X 08 mm 1960 mh/1000t 2 $2.75
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P-1811-77 18 X 11 mm 2880 mh/1000t 0 $3.05
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P-2213-77 22 X 13 mm 3660 mh/1000t -2 $3.75
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P-2616-77 26 X 16 mm 4700 mh/1000t -2 $4.25
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P-3019-77 30 X 19 mm 5900 mh/1000t 1 $4.75
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P-3622-77 36 X 22 mm 7680 mh/1000t 0 $6.25
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Disclaimer: CWS Bytemark reserves the right at any time and from time to time to make changes to design, technical specification, or construction of any product listed on this website without notice. CWS Bytemark also reserves the right to discontinue or limit sale of any product or service available throughout this website on temporary or permanently basis without notice. CWS Bytemark highly recommend customers not to use its products offered on this website for inappropriate use and applications. Products should be tested for its suitability by prospective customers in all possible applications and conditions.

WARNING: This product can expose you to chemicals, which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go to

Any Comments, Suggestions or Questions? Contact us! Email:
CWS 353 West Grove Ave. Orange, California 92865
Call us Toll Free: 1-800-679-3184 or 1 (800) 377-3244
Tel: (714) 279-9010, Fax: (714) 279-9482

Copyright (C)2008, CWS Bytemark
Updated 2013 Jan. Rev. V3.1