Specs for FT37-43 RF Toroids
From: https://toroids.info/FT37-43.php

FB-43-101

BLN1728-8

FT23-43

FT114-43

T25-2

T80-2


FB-43-2401

BN-43-2402

FT37-43

FT114-61

T25-6

T80-6


FB-73-2401

BN-61-2402

FT37-61

FT140-43

T30-2

T80-10


FB-43-4852

BN-43-1502

FT37-67

FT140-61

T30-6

T80-17


FB-43-7351

BN-61-1502

FT50-43

FT140-77

T30-10

T94-2


FB-31-1020

BN-43-302

FT50-61

FT240-31

T37-0

T94-6




BN-61-302

FT50-75

FT240-43

T37-1

T94-10




BN-43-202

FT50-J

FT240-52

T37-2

T106-0




BN-61-202

FT82-43

FT240-K

T37-6

T106-2




BN-73-202

FT82-61

FT240-61

T37-7

T106-6




BN-43-3312



FT290-43

T37-10

T130-0




BN-43-7051



XXX-XX

T37-17

T130-1




BN-61-002





T44-2

T130-2










T44-6

T130-6










T50-1

T130-17










T50-2

T157-2










T50-3

T157-17










T50-6

T184-17










T50-7

T200-2










T50-10

T200-2B










T50-17

T200-6










T68-1

T225-2B










T68-2












T68-6












T68-7












T68-10













Physical Dimensions









OD(A) = 0.375 in / 9.5 mm +/- 0.25 mm

ID(B) = 0.187 in. / 4.75 mm +/- 0.10 mm

Ht(C) = 0.125 in. / 3.3 mm +/- 0.25 mm

 A
L
=350 
 +/- 20 %      uH=(A
L
*Turns
2
)/1000 

Temperature Stability (ppm /°C) = 12500

Color Code = shiny black

Application Freq Range

Wideband Transformers 5 - 400 MHz

Power Transformers 0.5 - 30 MHz

RFI Suppression 5 - 500 MHz


Orders and Pricing


www.kitsandparts.com









Freq/L/C/Z/Turns Calculator for 
FT37-43



Includes 1 inch / 2.5 cm pig-tails



MHz



uH



pF



ohms



turns



inches - cm



 



 






enter uH to Calc number of turns, or

enter number of turns to Calc uH, or

enter two (2) items: MHz, uH, pF, ohms or turns to Calc all values.





Impedance Matching Network Calculator using a FT37-43 where Z2 > Z1

Enter F(MHz), Z1(Ω) and Z2(Ω) below, then click the Calc button




X
L

 = sqrt ( Z1*Z2 - Z1^2 )             
                   X
C
 = Z1*Z2 / X
L


F(MHz)



Z1(Ω)



Z2(Ω)



L(uH)



L(turns)



L(inches - cm)



C(pF)



 



 








Impedance Matching Network Calculator using a FT37-43 where Z2 > Z1

Enter F(MHz), Z1(Ω) and Z2(Ω) below, then click the Calc button




X
L

 = Z2 * sqrt ( Z1 / (Z2 - Z1) )           
                    
 X
C
 = Z1*Z2 / X
L


F(MHz)



Z1(Ω)



Z2(Ω)



L(uH)



(Lturns)



L(inches - cm)



C(pF)



 



 







additional rf-impedance-matching-calculator