Price survey on ferrite toroids and clamp-ons for ham RFI applications
Gary NA6O.  Updated July 2025 and partial Dec 2025. 
Reference: Fair-Rite catalog https://na6o.com/rfi/ewExternalFiles/Fair-Rite_Catalog_17th_Edition.pdf

Showing only suppliers with websites that list inventory and allow online ordering. When ordering 2.4-inch toroids, order in multiples of 10, then most suppliers will pack them in original factory-molded foam sheets. 

Tarriff note: As of July 2025 you may see an extra tariff charge at checkout or passed along via a bill from the carrier. Typically 22-25% and may be billed by the shipper later, which is a big surpise! Read the company listing for each part carefully and see if they indicate tariff.

************************************************************ 
Toroid, 2.4" (61 mm) OD, #31, Fair-Rite 2631803802
This is your #1 most-valuable RFI mitigation device. Buy LOTS of them.
************************************************************ 

https://www.arrow.com/en/products/2631803802/fair-rite-products
12-21-25 out of stock. ADD 22% TARIFF
1:   $3.63 -> $4.83
10:  $3.14 
25:  $2.78
100: $2.76

https://proaudioeng.com/fair-rite-ferrites/
7-16-25 in stock
1:  $7.00
4:  $6.75
10: $6.50

https://www.digikey.com/
12-29-25 large stock. No tariff note but probably add 22%
1:  $8.13
10: $5.46
25: $4.58
50: $4.14

https://www.mouser.com
12-29-25 large stock  ADD 25% TARIFF
1:   $7.87
10:  $5.47
20:  $4.59
50:  $4.47 

http://www.newark.com/     
12-29-25  in stock, includes tariff
1:   $9.59
10:  $6.30
25:  $6.20

http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-16-25 in stock
1:  $9.95
10: $8.45

http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25  in stock
1:   $9.99  
10:  $8.99
100: $7.95

http://www.kitsandparts.com/toroids.php
7-16-25  in stock, shipping: flat rate box, about $10
1:   $11.00
10:  $9.50

http://www.amidoncorp.com/ft-240-31/
7-16-25  in stock
1:  $11.00

https://www.dxengineering.com/parts/dxe-tc31-24-4
7-16-25 in stock
4:  $15.75


************************************************************ 
"Biggest clamp on"  Fair-Rite #31 p/n 0431177081
Page 83 of pdf catalog #17.  1" bore, 1.7" long
Equivalent to about 3 toroids.  Standard bulk pack: 36 pcs.
************************************************************ 

https://www.arrow.com/en/products/0431177081/fair-rite-products
7-16-25 in stock   
9:	 $8.16
25:  $7.52
100: $7.45

https://www.mouser.com 
12-29-25 in stock   ADD 25% TARIFF
1:  $14.02
10: $10.15
36: $10.03

https://www.digikey.com/
12-29-25 large stock. No tariff note but probably add 22%
1:  $15.36
10: $10.14
36: $8.78

https://proaudioeng.com/fair-rite-ferrites/
7-16-25 in stock
1:	 $15.25
10:  $14.88
25:  $14.41

https://www.newark.com/     54H0362
7-16-25  small stock
1:   $17.21
10:  $15.72
25:  $12.46

https://palomar-engineers.com/ferrite-products/ferrite-cores/Snap-On-Mix-31-RFI-Range-1-300-MHz-c21480229
7-16-25  in stock
1:   $19.50
3:   $16.65
10:  $16.95
36:  $15.27

http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-16-25 in stock
1:  $21.95
10: $18.65

https://www.dxengineering.com/parts/dxe-csb31-10-1
7-16-25 in stock
1:  $34.99

************************************************************ 
Extra-Large Toroid, Fair-Rite #31 2631814002
4-inch OD, 3-inch ID
Good for large power cords, often with the plug installed.
************************************************************ 

https://www.arrow.com/en/products/2631814002/fair-rite-products
7-16-25 in stock 
1:  $23.73
10: $16.56

https://proaudioeng.com/fair-rite-ferrites/
7-16-25  in stock
1:  $26.25
4:  $24.60

http://www.mouser.com 
7-16-25 in stock
1:  $27.67
10: $17.91
25: $17.65

http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-16-25 in stock
1:  $28.95

http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25  in stock
1:  $39.95

https://www.amidoncorp.com/ft-400-31/
7-16-25 in stock
1:  $44.50

https://www.dxengineering.com/parts/dxe-tc31-40-1
7-16-25 in stock
1: $61.99   

http://www.newark.com/     01P1090
7-16-25 out of stock
50:  $27.19

************************************************************ 
Toroid, 2.4" (61 mm) OD, #43, Fair-Rite 2643803802
Note: Mix 31 is generally preferred over this.
************************************************************ 

https://www.arrow.com/en/products/2643803802/fair-rite-products
7-16-25 in stock
1:   $5.10
10:  $3.90
25:  $3.50

http://www.mouser.com 
7-16-25 in stock
1:   $6.42
10:  $5.41
20:  $4.74
50:  $3.97

http://www.newark.com/    14N5458
7-16-25 in stock
1:   $7.60
10:  $7.30
25:  $6.53
50:  $6.17

http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25  in stock
1:   $8.95
10:  $8.00
100: $7.95

http://www.kitsandparts.com/toroids.php
7-16-25  in stock, shipping: flat rate box, about $10
1:   $9.00
10:  $8.50

http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-26-25 in stock
1:  $9.95
10: $8.45

http://www.amidoncorp.com/ft-240-43/
7-16-25
1:  $11.00

************************************************************ 
Toroid, 1.4" (36 mm) OD, #43, Fair-Rite 2643802702
Great for small wires like wall-warts
************************************************************ 

https://www.arrow.com/en/products/2643802702/fair-rite-products?q=2643802702
7-16-25 in stock  (+$1 ea tarrif, charged by FedX with no warning)
1:   $2.05
10:  $1.41
50:  $1.06
100: $0.93

http://www.mouser.com 
7-16-25 in stock
1:   $2.14
10:  $1.48
25:  $1.27
50:  $1.12

http://www.newark.com/    06C1035
7-16-25 in stock
1:   $2.62
10:  $2.00
25:  $1.71
50:  $1.56

http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25  in stock
1:   $3.89
10:  $3.50
100: $2.99

http://www.kitsandparts.com/toroids.php
7-16-25  in stock, shipping: flat rate box, about $10
2:  $6.00
30: $2.50

************************************************************ 
Toroid, 1.14" (29 mm) OD, #31, Fair-Rite 2631801202
Great for small wires like wall-warts
************************************************************ 
http://www.newark.com/    60M2921
12-29-25 in stock  Includes tariff
500  $2.02 (large quan only)

http://palomar-engineers.com/ferrite-products/ferrite-cores
7-16-25  in stock
1:  $1.95

https://www.arrow.com/en/products/2631801202/fair-rite-products
12-29-25 in stock  ADD 22% tariff
1:  $1.30
100: $1.12

http://www.kf7p.com/KF7P/Ferrite_chokes.html
7-16-25 in stock
1:  $2.45
10: $1.99

http://www.mouser.com 
7-16-25  in stock
1:   $2.69
10:  $1.90
25:  $1.59
100: $1.43

************************************************************ 
Snap-on, 1.22" long, 0..500" bore, #31, Fair-Rite 0431164181
Great for small wires like wall-warts, also fits RG8. Bulk pack is 110 pcs.
************************************************************ 
https://proaudioeng.com/fair-rite-ferrites/
12-21-25 in stock
1:  $4.17
4:  $4.05
10: $3.90

https://www.digikey.com/
12-29-25 large stock. No tariff note but probably add 22%
1:  $4.84
10: $3.29
25: $2.78
50:  $2.43
110: $2.25

http://www.mouser.com 
12-21-25  in stock  ADD 25% TARIFF
1:   $4.84
10:  $3.29
25:  $2.79
50:  $2.43