Ferrite Toroidal Cores

F-series

A_L (nH/Square Turn or nH/N²) is the A_L value.
L is inductance in nH (nanohenries)
N is the number of turns of a wire
Required turns (N) = square root of (desired 'L' /'A_L'), √'L' /'A_L', or 1000 turns=

\sqrt{'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 of the toroid core
I.D. is the inside diameter of the toroid core
HT is the height of the toroid core
Color may vary by material and coating characteristics
Parts are RoHS compliant

•Technical Information
•For other product details refer to: http://www.bytemark.com

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 sales@cwsbytemark.com

Part Number: (Type - Size (inches) - Material/Coat or Mix) where C stands for a coat type (see PDF)
Ex: F-23-43 F = Ferrite Toroidal, 0.23 = O.D. Dimension, 43 = Material Type or Mix
O.D. is divided by 100 to get measurement in inches
Limited product may be carried under a similar name to that of other companies

Displaying 1 to 126 (of 126 products)

Part Number A_L
nH/N² O.D. x I.D. x HT
(in.) Material Initial Permeability Alternate
Part # A_e
(cm²) L_e
(cm) Weight
(g) Quantity
on hand Price

F-193-WC 12130 1.932 x 1.252 x 0.625 W 10000 ZW-44920-TC 1.190 12.30 74.60 6 $10.50

F-114-43 510 1.142 x 0.748 x 0.295 43 800 5943001001 0.370 7.30 13.00 921 $2.25

F-114-61 80 1.142 x 0.748 x 0.285 61 125 5961001001 0.370 7.30 13.00 3768 $2.25

F-114-67 25 1.142 x 0.748 x 0.295 67 40 5967001001 0.370 7.30 13.00 51 $3.50

F-114-F 1902 1.142 x 0.748 x 0.295 F 3000 0F-42908-TC 0.358 7.32 12.90 92 $2.25

F-114-J 3170 1.142 x 0.748 x 0.295 J 5000 0J-42908-TC 0.358 7.32 12.90 214 $2.25

F-114A-43 950 1.142 x 0.748 x 0.545 43 800 5977001201 0.680 7.30 26.00 15 $2.45

F-114A-61 209 $5.90

F-125-K 2615 1.250 x 0.900 x 0.500 K 250 F-125-K 0.590 7.60 6511 $4.00 $1.75
Save: 56% off

F-140-43 885 1.400 x 0.900 x 0.500 43 800 5943002701 0.790 8.90 33.00 105 $3.75

F-140A-F 4040 1.417 x 0.906 x 0.590 F 3000 0F-43615-TC 0.946 8.97 44.00 38 $4.50

F-140A-W 13400 1.417 x 0.906 x 0.590 W 10000 0W-43615-TC 0.946 8.97 44.00 23 $6.00

F-150-F 2640 1.500 x 0.750 x 0.250 F 3000 0F-43806-TC 0.570 8.30 26.40 78 $5.00

F-150-J 4400 1.500 x 0.750 x 0.250 J 5000 0J-43806-TC 0.570 8.30 26.40 10 $5.00

F-150A-F 5020 1.500 x 0.750 x 0.500 F 3000 0F-43813-TC 1.150 8.30 51.70 83 $7.50

F-150A-J 8365 1.500 x 0.750 x 0.500 J 5000 0J-43813-TC 1.150 8.30 51.70 684 $8.00

F-150A-K 4508 1.500 x 0.750 x 0.500 K 250 F-150A-K 1.110 8.30 40 $7.00

F-193-J 6065 1.932 x 1.252 x 0.625 J 5000 0J-44920-TC 1.190 12.30 74.60 53 $10.00

F-193A-F 4460 1.932 x 1.252 x 0.750 F 3000 0F-44925-TC 1.460 12.30 91.00 170 $10.50

F-193A-J 7435 1.932 x 1.252 x 0.750 J 5000 0J-44925-TC 1.460 12.30 91.00 273 $10.50

F-23-61 25 0.230 x 0.120 x 0.060 61 125 5961000101 0.020 1.30 0.14 1984 $0.50

F-23-67 6 Min 0.230 x 0.120 x 0.060 67 40 5967000101 0.020 1.30 0.14 2694 $0.50

F-23-F 585 0.230 x 0.120 x 0.060 F 3000 0F-40601-TC 0.021 1.30 0.14 404 $0.50

F-23-H 2940 0.230 x 0.120 x 0.060 H 15000 0H-40601-TC 0.021 1.30 0.14 9544 $0.50

F-23-WC 1960 0.230 x 0.120 x 0.060 W 10000 YW-40601-TC 0.021 1.30 0.14 210 $1.00

F-234-KC 400 2.340 x 1.370 x 0.504 K 250 F-234-KC 531 $13.95

F-240-W 13690 2.400 x 1.400 x 0.500 W 10000 0W-46113-TC 1.560 14.50 117.30 22 $25.00

F-37-43 350 0.375 x 0.187 x 0.125 43 800 5943000201 0.072 2.07 0.83 0 $0.60

F-37-61 55 0.375 x 0.187 x 0.125 61 125 5961000201 0.072 2.07 0.83 193 $0.60

F-37-67 18 0.375 x 0.187 x 0.125 67 40 5967000201 0.072 2.07 0.83 547 $0.60

F-37-68 5.3 Min 0.740 x 0.187 x 0.125 68 16 5968000201 0.073 2.07 0.83 290 $0.60

F-37-H 6590 0.375 x 0.187 x 0.125 H 15000 0H-41003-TC 0.070 2.07 0.82 136 $0.60

F-37-W 4392 0.375 x 0.187 x 0.125 W 10000 0W-41003-TC 0.070 2.07 0.82 0 $1.75

F-50-43 440 0.500 x 0.281 x 0.188 43 800 5943000301 0.129 2.95 2.00 1038 $0.75

F-50-61 69 0.500 x 0.281 x 0.188 61 125 5961000301 0.129 2.95 2.00 35 $0.75

F-50-67 22 0.500 x 0.281 x 0.188 67 40 5967000301 0.129 2.95 2.00 326 $0.75

F-50-68 6.6 Min 0.500 x 0.281 x 0.188 68 16 5968000301 0.129 2.95 2.00 960 $0.75

F-50-F 1630 0.500 x 0.281 x 0.188 F 3000 0F-41407-TC 0.126 2.95 1.90 590 $0.75

F-50-H 8140 0.500 x 0.281 x 0.188 H 15000 0H-41407-TC 0.126 2.95 1.90 245 $0.75

F-50-J 2715 0.500 x 0.281 x 0.188 J 5000 0J-41407-TC 0.126 2.95 1.90 272 $0.75

F-50-WC 5430 0.500 x 0.281 x 0.188 W 10000 ZW-41407-TC 0.126 2.95 1.90 350 $0.75

F-50A-43 480 0.500 x 0.312 x 0.250 43 800 5943001101 0.150 3.12 2.40 864 $0.85

F-50A-61 75 0.500 x 0.312 x 0.250 61 125 5961001101 0.150 3.12 2.40 7501 $0.85

F-50A-67 24 0.500 x 0.312 x 0.250 67 40 5967001101 0.150 3.12 2.40 519 $0.85

F-50A-68 7.2 Min 0.500 x 0.311 x 0.250 68 16 5968000301 0.150 3.12 2.40 190 $1.50

F-50A-77 1200 0.500 x 0.312 x 0.250 77 2000 5977001101 0.150 3.12 2.40 2184 $0.85

F-50A-J 2968 0.500 x 0.312 x 0.250 J 5000 0J-41306-TC 0.146 3.12 2.40 500 $0.85

F-50A-W 5936 0.500 x 0.312 x 0.250 W 10000 0W-41306-TC 0.146 3.12 2.40 17 $1.00

F-50B-43 965 0.500 x 0.312 x 0.250 43 800 5943001901 0.299 3.12 4.70 965 $0.95

F-50B-61 150 0.500 x 0.312 x 0.250 61 125 5961001901 0.299 3.12 4.70 55 $0.95

F-50B-67 48 0.500 x 0.312 x 0.500 67 40 5967001901 0.299 3.12 4.70 219 $0.95

F-50B-75 6000 0.500 x 0.312 x 0.500 75 5000 5975001901 0.299 3.12 4.70 159 $0.95

F-50B-77 2400 0.500 x 0.312 x 0.500 77 2000 5977001901 0.299 3.12 4.70 785 $0.95

F-82-43 470 0.825 x 0.520 x 0.468 43 800 5943000601 0.243 5.20 6.40 8728 $1.20

F-82-61 75 0.825 x 0.520 x 0.250 61 125 5961000601 0.243 5.20 6.40 1748 $1.20

F-82-67 22.4 0.825 x 0.516 x 0.250 67 40 5967000601 0.243 5.20 6.40 1174 $1.20

F-82-75 2950 0.825 x 0.520 x 0.250 75 5000 5975000601 0.243 5.20 6.40 23 $1.20

F-82-77 1175 0.825 x 0.520 x 0.250 77 2000 5977000601 0.243 5.20 6.40 1630 $1.20

F-87-43 485 0.870 x 0.540 x 0.250 43 800 5943001801 0.262 5.40 7.20 1008 $1.50

F-87-77 1400 0.870 x 0.540 x 0.250 77 2000 5977001801 0.262 5.40 7.20 4759 $1.50

F-87-H 9060 0.870 x 0.540 x 0.250 H 15000 0H-42206-TC 0.250 5.42 6.40 788 $1.75

F-87-J 3020 0.870 x 0.540 x 0.250 J 5000 0J-42206-TC 0.250 5.42 6.40 441 $1.20

F-87-W 6040 0.870 x 0.540 x 0.250 W 10000 0W-42206-TC 0.250 5.42 6.40 33 $1.20

F-87A-H 18100 0.870 x 0.540 x 0.500 H 15000 0H-42212-TC 0.511 5.42 13.50 375 $2.00

F-87A-J 6040 0.870 x 0.540 x 0.500 J 5000 0J-42212-TC 0.511 5.42 13.50 24 $2.00

F-23-43 158 0.230 x 0.120 x 0.060 43 800 5943000101 0.020 1.30 0.14 1417 $0.50

F-23-77 390 0.230 x 0.120 x 0.060 77 2000 5977000101 0.020 1.30 0.14 930 $0.50

F-50A-HC 8840 0.500 x 0.317 x 0.250 H 15000 ZH-41306-TC 0.146 3.12 2.40 1440 $2.25

F-114-JC 3170 1.142 x 0.748 x 0.295 J 5000 ZJ-42908-TC 0.358 7.32 12.90 122 $2.75

F-100-JC 3913 1.000 x 0.610 x 0.312 J 5000 ZJ-42507-TC 0.374 6.17 11.60 309 $1.05

F-114-43C 510 1.187 x 0.708 x 0.325 43 800 5943001021 0.370 7.30 13.00 0 $2.45

F-125-61C 120 1.299 x 0.729 x 0.405 61 125 5961001721 0.590 7.60 23.00 98 $3.00

F-125-67 39 1.250 x 0.750 x 0.375 67 40 5967001701 0.590 7.60 23.00 15 $3.00

F-140A-FC 4040 1.417 x 0.906 x 0.590 F 3000 ZF-43615-TC 0.946 8.97 44.00 85 $4.50

F-150A-FC 5020 1.500 x 0.750 x 0.500 F 3000 ZF-43813-TC 1.150 8.30 51.70 6 $8.50

F-150A-JC 8365 1.500 x 0.750 x 0.500 J 5000 ZJ-43813-TC 1.150 8.30 51.70 1058 $9.00

F-150A-WC 16700 1.500 x 0.750 x 0.500 W 10000 ZW-43813-TC 1.150 8.30 51.70 791 $9.00

F-200-K K 250 F-200-K 9 $11.50

F-23-75 785 0.230 x 0.120 x 0.060 75 5000 5975000101 0.020 1.30 0.14 261 $0.50

F-240-43C 1075 2.472 x 1.347 x 0.539 43 800 5943003821 1.580 14.50 106.00 43 $13.00

F-240-JC 6845 2.400 x 1.400 x 0.500 J 5000 ZJ-46113-TC 1.560 14.50 117.30 662 $12.00

F-240-WC 13690 2.400 x 1.400 x 0.500 W 10000 ZW-46113-TC 1.560 14.50 117.30 208 $30.00

F-290-JC 8140 2.900 x 1.530 x 0.500 J 5000 ZJ-47313-TC 2.120 1.65 177.00 42 $40.00

F-37-JC 2196 0.375 x 0.187 x 0.125 J 5000 ZJ-41003-TC 0.070 2.07 0.82 14 $2.00

F-50-43C 440 0.529 x 0.254 x 0.213 43 800 5943000321 0.129 2.95 2.00 346 $0.95

F-50-75 2725 0.500 x 0.281 x 0.188 75 5000 5975000301 0.129 2.95 2.00 463 $0.75

F-50-75C 2725 0.500 x 0.281 x 0.188 75 5000 5975000301C 0.129 2.95 2.00 371 $1.00

F-50-77 1180 0.500 x 0.281 x 0.188 77 2000 5977000301 0.129 2.95 2.00 224 $0.75

F-50-77C 1180 0.529 x 0.254 x 0.212 77 2000 5977000321 0.129 2.95 2.00 270 $0.85

F-50-W 5430 0.500 x 0.281 x 0.188 W 10000 0W-41407-TC 0.126 2.95 1.90 79 $0.75

F-50A-43C 480 0.500 x 0.312 x 0.250 43 800 0.150 3.12 2.40 2492 $0.85

F-50A-63 63 5963001101 11 $0.85

F-50A-75 3000 0.500 x 0.312 x 0.250 75 5000 5975001101 0.150 3.12 2.40 10 $0.85

F-50A-77C 1300 0.529 x 0.284 x 0.279 77 2000 5977001121 0.150 3.12 2.40 3303 $0.95

F-50A-FC 1782 0.500 x 0.312 x 0.250 F 3000 ZF-41306-TC 0.146 3.12 2.40 1451 $0.95

F-62-WC 5520 0.625 x 0.350 x 0.185 W 10000 ZW-41605-TC 0.153 3.68 2.80 86 $1.20

F-80-JC 4200 0.810 x 0.500 x 0.350 J 5000 ZJ-42109TC 0.326 5.00 8.10 16 $1.85

F-80-WC 8400 0.810 x 0.500 x 0.350 W 10000 ZW-42109-TC 0.326 5.00 8.10 395 $3.00

F-87A-JC 6040 0.870 x 0.540 x 0.500 J 5000 ZJ-42212-TC 0.511 5.42 13.50 945 $2.00

F-87-WC 6040 0.870 x 0.540 x 0.250 W 10000 ZW-42206-TC 0.250 5.42 6.40 326 $1.50

F-87-77C 1305 0.905 x 0.508 x 0.279 77 2000 5977001821 0.262 5.40 7.20 2909 $1.20

F-82-77C 1270 0.860 x 0.489 x 0.279 77 2000 5977000621 0.243 5.20 6.40 202 $2.00

F-150A-KC 4508 1.500 x 0.750 x 0.500 K 250 F-150A-KC 1.110 8.30 1445 $8.00

ZW-42507-TC 7825 1.000 x 0.608 x 0.302 W 10000 ZW-42507-TC 0.374 6.15 11.60 22 $1.53

ZW-44916-TC 11800 1.932 x 1.332 x 0.625 W 10000 ZW-44916-TC 1.200 12.70 75.30 795 $8.50

ZJ-42207-TC 3700 0.870 x 0.540 x 0.312 J 5000 ZJ-42207-TC 0.325 5.42 8.50 42 $1.38

ZP-41306-TC 1485 0.500 x 0.320 x 0.250 P 2500 ZP-41306-TC 0.142 3.17 2.40 448 $0.96

ZP-47313-TC 4024 2.900 x 1.530 x 0.500 P 2500 ZP-47313-TC 2.100 16.50 172.00 114 $18.00

ZF-41005-TC 1980 0.375 x 0.187 x 0.188 F 3000 ZF-41005-TC 0.109 2.07 1.20 23 $0.96

ZF-41406-TC 2166 0.500 x 0.312 x 0.250 F 3000 ZF-41406-TC 0.171 2.95 2.70 202 $0.90

ZF-41303-TC 894 0.500 x 0.320 x 0.125 F 3000 ZF-41303-TC 0.071 3.17 1.20 2230 $0.54

ZJ-41305-TC 2380 0.500 x 0.320 x 0.200 J 5000 ZJ-41305-TC 0.114 3.17 1.90 188 $0.87

YW-40402-TC 3800 0.190 x 0.090 x 0.100 W 10000 YW-40402-TC 0.031 1.02 0.17 206 $0.39

YW-40705-TC 8350 0.300 x 0.125 x 0.188 W 10000 YW-40705-TC 0.099 1.50 0.90 725 $0.54

VJ-42206-TC 3020 0.870 x 0.540 x 0.250 J 5000 VJ-42206-TC 0.262 5.41 6.40 116 $0.75

ZF-40907-TC 2260 0.375 x 0.220 x 0.280 F 3000 ZF-40907-TC 0.137 2.27 1.60 93 $2.55

ZJ-41809-TC 6115 0.726 x 0.384 x 0.404 J 5000 ZJ-41809-TC 0.431 4.14 9.90 95 $2.25

ZW-41406-TC 7224 0.500 x 0.281 x 0.250 W 10000 ZW-41406-TC 0.171 2.95 2.70 1303 $1.20

ZW-46113-TC 13690 2.400 x 1.400 x 0.500 W 10000 ZW-46113-TC 1.574 14.46 113.00 34 $19.89

ZW-48613-TC 11040 3.375 x 2.187 x 0.500 W 10000 ZW-48613-TC 1.888 21.50 203.00 25 $29.40

ZJ-41206-TC 5640 0.500 x 0.203 x 0.250 J 5000 ZJ-41206-TC 0.220 2.50 3.30 46

ZP-41406-TC 1805 0.500 x 0.281 x 0.250 P 2500 ZP-41406-TC 0.171 2.95 2.70 500

ZP-42106-TC 1500 0.811 x 0.500 x0.250 P 2500 ZP-42106-TC 0.246 5.03 5.40 48 $0.96

F-394-J1 11500 3.940 x 2.160 x 0.790 J1 5000 CF265 T10020 4.368 22.96 520 10

F-590-J1 5700 5.964 x 4.094 x 0.590 J1 5000 CF265 T15215 3.557 39.26 10

F-795-J1 6700 6.023 x 6.142 x 5.906 J1 5000 CF265 T20225 6.086 55.05 160.00 10

Displaying 1 to 126 (of 126 products)