Reference › Toroid cores

Toroid Core Reference

Every core in QRPedia's calculators, from the same data the calculators use. Blank cells mean the source data has no value.

Iron powder toroids

Source: Micrometals per-part datasheets (datasheets.micrometals.com); mix 12 (no Micrometals datasheets) from Amidon's 12 Material page, which states no A_L tolerance. Frequency ranges are Amidon's published ranges, as cited in the calculator. Dimensions are in inches.

Core	Mix	Color	A_L (nH/N²)	Tol.	OD	ID	Ht	Usable range	Best Q	Calculator
T-20-0	0	tan	0.35		0.2	0.088	0.07	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-20-0
T-20-1	1	blue	5.2	±10%	0.2	0.088	0.07	0.5 to 5 MHz		Open in calculator for T-20-1
T-20-2	2	red	2.5	±5%	0.2	0.088	0.07	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-20-2
T-20-3	3	gray	7.6	±10%	0.2	0.088	0.07	0.05 to 0.5 MHz		Open in calculator for T-20-3
T-20-6	6	yellow	2.2	±5%	0.2	0.088	0.07	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-20-6
T-20-7	7	white	2.3	±5%	0.2	0.088	0.07	3 to 35 MHz		Open in calculator for T-20-7
T-20-10	10	black	1.6	±5%	0.2	0.088	0.07	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-20-10
T-20-12	12	green/white	1		0.2	0.088	0.07	50 to 200 MHz	30 to 250 MHz	Open in calculator for T-20-12
T-20-15	15	red/white	6.5	±10%	0.2	0.088	0.07	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-20-15
T-20-17	17	blue/yellow	1	±5%	0.2	0.088	0.07	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-20-17
T-22-2	2	red	5.5	±5%	0.223	0.097	0.143	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-22-2
T-22-6	6	yellow	4.5	±5%	0.223	0.097	0.143	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-22-6
T-22-10	10	black	3.2	±5%	0.223	0.097	0.143	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-22-10
T-25-0	0	tan	0.45		0.255	0.12	0.096	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-25-0
T-25-1	1	blue	7	±10%	0.255	0.12	0.096	0.5 to 5 MHz		Open in calculator for T-25-1
T-25-2	2	red	3.4	±5%	0.255	0.12	0.096	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-25-2
T-25-3	3	gray	10	±10%	0.255	0.12	0.096	0.05 to 0.5 MHz		Open in calculator for T-25-3
T-25-6	6	yellow	2.7	±5%	0.255	0.12	0.096	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-25-6
T-25-7	7	white	2.9	±5%	0.255	0.12	0.096	3 to 35 MHz		Open in calculator for T-25-7
T-25-10	10	black	1.9	±5%	0.255	0.12	0.096	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-25-10
T-25-12	12	green/white	1.2		0.255	0.12	0.096	50 to 200 MHz	30 to 250 MHz	Open in calculator for T-25-12
T-25-15	15	red/white	8.5	±10%	0.255	0.12	0.096	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-25-15
T-25-17	17	blue/yellow	1.2	±5%	0.255	0.12	0.096	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-25-17
T-27-0	0	tan	0.45		0.28	0.151	0.128	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-27-0
T-27-2	2	red	3.3	±5%	0.28	0.151	0.128	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-27-2
T-27-6	6	yellow	2.7	±5%	0.28	0.151	0.128	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-27-6
T-27-10	10	black	2.2	±5%	0.28	0.151	0.128	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-27-10
T-27-17	17	blue/yellow	1.3	±5%	0.28	0.151	0.128	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-27-17
T-30-0	0	tan	0.6		0.307	0.151	0.128	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-30-0
T-30-1	1	blue	8.5	±10%	0.307	0.151	0.128	0.5 to 5 MHz		Open in calculator for T-30-1
T-30-2	2	red	4.3	±5%	0.307	0.151	0.128	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-30-2
T-30-3	3	gray	14	±10%	0.307	0.151	0.128	0.05 to 0.5 MHz		Open in calculator for T-30-3
T-30-6	6	yellow	3.6	±5%	0.307	0.151	0.128	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-30-6
T-30-7	7	white	3.7	±5%	0.307	0.151	0.128	3 to 35 MHz		Open in calculator for T-30-7
T-30-10	10	black	2.5	±5%	0.307	0.151	0.128	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-30-10
T-30-12	12	green/white	1.6		0.307	0.151	0.128	50 to 200 MHz	30 to 250 MHz	Open in calculator for T-30-12
T-30-15	15	red/white	9.3	±10%	0.307	0.151	0.128	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-30-15
T-30-17	17	blue/yellow	1.6	±5%	0.307	0.151	0.128	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-30-17
T-37-0	0	tan	0.49		0.375	0.205	0.128	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-37-0
T-37-1	1	blue	8	±10%	0.375	0.205	0.128	0.5 to 5 MHz		Open in calculator for T-37-1
T-37-2	2	red	4	±5%	0.375	0.205	0.128	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-37-2
T-37-3	3	gray	12	±10%	0.375	0.205	0.128	0.05 to 0.5 MHz		Open in calculator for T-37-3
T-37-6	6	yellow	3	±5%	0.375	0.205	0.128	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-37-6
T-37-7	7	white	3.2	±5%	0.375	0.205	0.128	3 to 35 MHz		Open in calculator for T-37-7
T-37-10	10	black	2.5	±5%	0.375	0.205	0.128	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-37-10
T-37-12	12	green/white	1.5		0.375	0.205	0.128	50 to 200 MHz	30 to 250 MHz	Open in calculator for T-37-12
T-37-15	15	red/white	9	±10%	0.375	0.205	0.128	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-37-15
T-37-17	17	blue/yellow	1.5	±5%	0.375	0.205	0.128	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-37-17
T-44-0	0	tan	0.65		0.44	0.229	0.159	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-44-0
T-44-1	1	blue	10.5	±10%	0.44	0.229	0.159	0.5 to 5 MHz		Open in calculator for T-44-1
T-44-2	2	red	5.2	±5%	0.44	0.229	0.159	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-44-2
T-44-3	3	gray	18	±10%	0.44	0.229	0.159	0.05 to 0.5 MHz		Open in calculator for T-44-3
T-44-6	6	yellow	4.2	±5%	0.44	0.229	0.159	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-44-6
T-44-7	7	white	4.6	±5%	0.44	0.229	0.159	3 to 35 MHz		Open in calculator for T-44-7
T-44-10	10	black	3.3	±5%	0.44	0.229	0.159	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-44-10
T-44-12	12	green/white	1.85		0.44	0.229	0.159	50 to 200 MHz	30 to 250 MHz	Open in calculator for T-44-12
T-44-15	15	red/white	16	±10%	0.44	0.229	0.159	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-44-15
T-44-17	17	blue/yellow	1.85	±5%	0.44	0.229	0.159	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-44-17
T-44-2A	2	red	3.6	±5%	0.44	0.229	0.128	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-44-2A
T-50-0	0	tan	0.64		0.5	0.303	0.19	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-50-0
T-50-1	1	blue	10	±10%	0.5	0.303	0.19	0.5 to 5 MHz		Open in calculator for T-50-1
T-50-2	2	red	4.9	±5%	0.5	0.303	0.19	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-50-2
T-50-3	3	gray	17.5	±10%	0.5	0.303	0.19	0.05 to 0.5 MHz		Open in calculator for T-50-3
T-50-6	6	yellow	4	±5%	0.5	0.303	0.19	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-50-6
T-50-7	7	white	4.3	±5%	0.5	0.303	0.19	3 to 35 MHz		Open in calculator for T-50-7
T-50-10	10	black	3.1	±5%	0.5	0.303	0.19	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-50-10
T-50-12	12	green/white	1.8		0.5	0.303	0.19	50 to 200 MHz	30 to 250 MHz	Open in calculator for T-50-12
T-50-15	15	red/white	13.5	±10%	0.5	0.303	0.19	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-50-15
T-50-17	17	blue/yellow	1.8	±5%	0.5	0.303	0.19	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-50-17
T-51-2B	2	red	13.8	±5%	0.5	0.2	0.312	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-51-2B
T-51-6B	6	yellow	10.2	±5%	0.5	0.2	0.312	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-51-6B
T-60-2	2	red	6.5	±5%	0.6	0.336	0.234	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-60-2
T-60-6	6	yellow	5.5	±5%	0.6	0.336	0.234	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-60-6
T-68-0	0	tan	0.75		0.69	0.37	0.19	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-68-0
T-68-1	1	blue	11.5	±10%	0.69	0.37	0.19	0.5 to 5 MHz		Open in calculator for T-68-1
T-68-2	2	red	5.7	±5%	0.69	0.37	0.19	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-68-2
T-68-3	3	gray	19.5	±10%	0.69	0.37	0.19	0.05 to 0.5 MHz		Open in calculator for T-68-3
T-68-6	6	yellow	4.7	±5%	0.69	0.37	0.19	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-68-6
T-68-7	7	white	5.2	±5%	0.69	0.37	0.19	3 to 35 MHz		Open in calculator for T-68-7
T-68-10	10	black	3.2	±5%	0.69	0.37	0.19	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-68-10
T-68-12	12	green/white	2.1		0.69	0.37	0.19	50 to 200 MHz	30 to 250 MHz	Open in calculator for T-68-12
T-68-15	15	red/white	18	±10%	0.69	0.37	0.19	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-68-15
T-68-17	17	blue/yellow	2.1	±5%	0.69	0.37	0.19	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-68-17
T-68-2A	2	red	7	±5%	0.69	0.37	0.25	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-68-2A
T-68-3A	3	gray	26	±10%	0.69	0.37	0.25	0.05 to 0.5 MHz		Open in calculator for T-68-3A
T-68-6A	6	yellow	6.2	±5%	0.69	0.37	0.25	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-68-6A
T-68-7A	7	white	7.3	±5%	0.69	0.37	0.25	3 to 35 MHz		Open in calculator for T-68-7A
T-72-2	2	red	12.8	±5%	0.72	0.28	0.26	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-72-2
T-72-3	3	gray	36	±10%	0.72	0.28	0.26	0.05 to 0.5 MHz		Open in calculator for T-72-3
T-72-7	7	white	9.5	±5%	0.72	0.28	0.26	3 to 35 MHz		Open in calculator for T-72-7
T-80-0	0	tan	0.85		0.795	0.495	0.25	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-80-0
T-80-1	1	blue	11.5	±10%	0.795	0.495	0.25	0.5 to 5 MHz		Open in calculator for T-80-1
T-80-2	2	red	5.5	±5%	0.795	0.495	0.25	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-80-2
T-80-3	3	gray	18	±10%	0.795	0.495	0.25	0.05 to 0.5 MHz		Open in calculator for T-80-3
T-80-6	6	yellow	4.5	±5%	0.795	0.495	0.25	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-80-6
T-80-10	10	black	3.2	±5%	0.795	0.495	0.25	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-80-10
T-80-12	12	green/white	2.2		0.795	0.495	0.25	50 to 200 MHz	30 to 250 MHz	Open in calculator for T-80-12
T-80-15	15	red/white	17	±10%	0.795	0.495	0.25	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-80-15
T-80-17	17	blue/yellow	2.2	±5%	0.795	0.495	0.25	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-80-17
T-80-7B	7	white	8.4	±5%	0.795	0.495	0.375	3 to 35 MHz		Open in calculator for T-80-7B
T-94-0	0	tan	1.06		0.942	0.56	0.312	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-94-0
T-94-1	1	blue	16	±10%	0.942	0.56	0.312	0.5 to 5 MHz		Open in calculator for T-94-1
T-94-2	2	red	8.4	±5%	0.942	0.56	0.312	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-94-2
T-94-3	3	gray	24.8	±10%	0.942	0.56	0.312	0.05 to 0.5 MHz		Open in calculator for T-94-3
T-94-6	6	yellow	7	±5%	0.942	0.56	0.312	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-94-6
T-94-10	10	black	5.8	±5%	0.942	0.56	0.312	10 to 100 MHz	15 to 100 MHz	Open in calculator for T-94-10
T-94-15	15	red/white	20	±10%	0.942	0.56	0.312	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-94-15
T-94-17	17	blue/yellow	2.9	±5%	0.942	0.56	0.312	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-94-17
T-106-0	0	tan	1.9		1.06	0.57	0.437	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-106-0
T-106-1	1	blue	28	±10%	1.06	0.57	0.437	0.5 to 5 MHz		Open in calculator for T-106-1
T-106-2	2	red	13.5	±5%	1.06	0.57	0.437	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-106-2
T-106-3	3	gray	45	±10%	1.06	0.57	0.437	0.05 to 0.5 MHz		Open in calculator for T-106-3
T-106-6	6	yellow	11.6	±5%	1.06	0.57	0.437	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-106-6
T-106-7	7	white	13.3	±5%	1.06	0.57	0.437	3 to 35 MHz		Open in calculator for T-106-7
T-106-15	15	red/white	34.5	±10%	1.06	0.57	0.437	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-106-15
T-106-17	17	blue/yellow	5.1	±5%	1.06	0.57	0.437	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-106-17
T-130-0	0	tan	1.5		1.3	0.78	0.437	100 to 300 MHz	50 to 350 MHz	Open in calculator for T-130-0
T-130-1	1	blue	20	±10%	1.3	0.78	0.437	0.5 to 5 MHz		Open in calculator for T-130-1
T-130-2	2	red	11	±5%	1.3	0.78	0.437	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-130-2
T-130-3	3	gray	35	±10%	1.3	0.78	0.437	0.05 to 0.5 MHz		Open in calculator for T-130-3
T-130-6	6	yellow	9.6	±5%	1.3	0.78	0.437	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-130-6
T-130-7	7	white	10.3	±5%	1.3	0.78	0.437	3 to 35 MHz		Open in calculator for T-130-7
T-130-15	15	red/white	25	±10%	1.3	0.78	0.437	0.1 to 2 MHz	0.15 to 3 MHz	Open in calculator for T-130-15
T-130-17	17	blue/yellow	4	±5%	1.3	0.78	0.437	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-130-17
T-157-1	1	blue	32	±10%	1.57	0.95	0.57	0.5 to 5 MHz		Open in calculator for T-157-1
T-157-2	2	red	14	±5%	1.57	0.95	0.57	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-157-2
T-157-3	3	gray	42	±10%	1.57	0.95	0.57	0.05 to 0.5 MHz		Open in calculator for T-157-3
T-157-6	6	yellow	11.5	±5%	1.57	0.95	0.57	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-157-6
T-157-17	17	blue/yellow	5.3	±5%	1.57	0.95	0.57	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-157-17
T-175-2	2	red	15	±5%	1.75	1.07	0.65	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-175-2
T-175-6	6	yellow	12.5	±5%	1.75	1.07	0.65	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-175-6
T-184-1	1	blue	50	±10%	1.84	0.95	0.71	0.5 to 5 MHz		Open in calculator for T-184-1
T-184-2	2	red	24	±5%	1.84	0.95	0.71	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-184-2
T-184-3	3	gray	72	±10%	1.84	0.95	0.71	0.05 to 0.5 MHz		Open in calculator for T-184-3
T-184-6	6	yellow	19.5	±5%	1.84	0.95	0.71	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-184-6
T-184-17	17	blue/yellow	8.7	±5%	1.84	0.95	0.71	20 to 200 MHz	20 to 200 MHz	Open in calculator for T-184-17
T-200-1	1	blue	25	±10%	2	1.25	0.55	0.5 to 5 MHz		Open in calculator for T-200-1
T-200-2	2	red	12	±5%	2	1.25	0.55	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-200-2
T-200-3	3	gray	42.5	±10%	2	1.25	0.55	0.05 to 0.5 MHz		Open in calculator for T-200-3
T-200-6	6	yellow	10.4	±5%	2	1.25	0.55	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-200-6
T-200-7	7	white	10.5	±5%	2	1.25	0.55	3 to 35 MHz		Open in calculator for T-200-7
T-200-2B	2	red	21.8	±5%	2	1.25	1	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-200-2B
T-225-2	2	red	12	±5%	2.25	1.405	0.55	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-225-2
T-225-3	3	gray	42.5	±10%	2.25	1.405	0.55	0.05 to 0.5 MHz		Open in calculator for T-225-3
T-225-6	6	yellow	10.4	±5%	2.25	1.405	0.55	10 to 50 MHz	3 to 40 MHz	Open in calculator for T-225-6
T-225-2B	2	red	21.5	±5%	2.25	1.405	1	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-225-2B
T-300-2	2	red	11.4	±5%	3.04	1.93	0.5	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-300-2
T-300-2D	2	red	22.8	±5%	3.04	1.93	1	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-300-2D
T-400-2	2	red	18	±5%	4	2.25	0.65	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-400-2
T-400-2D	2	red	36	±5%	4	2.25	1.3	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-400-2D
T-520-2	2	red	20	±5%	5.2	3.08	0.8	2 to 30 MHz	0.25 to 10 MHz	Open in calculator for T-520-2

Ferrite toroids

Source: Fair-Rite per-part product pages and datasheets (fair-rite.com). Dimensions are in mm.

Core	Fair-Rite part	Mix	µi	A_L (nH/N²)	Tol.	OD	ID	Ht	Calculator
FT-23-43	5943000101	43	800	158	±20%	5.95	3.05	1.65	Open in calculator for FT-23-43
FT-23-61	5961000101	61	125	25	±25%	5.95	3.05	1.65	Open in calculator for FT-23-61
FT-37-43	5943000201	43	800	350	±20%	9.5	4.75	3.175	Open in calculator for FT-37-43
FT-37-61	5961000201	61	125	55	±25%	9.5	4.75	3.3	Open in calculator for FT-37-61
FT-50-43	5943000301	43	800	440	±20%	12.7	7.15	4.9	Open in calculator for FT-50-43
FT-50-61	5961000301	61	125	69	±25%	12.7	7.15	4.9	Open in calculator for FT-50-61
FT-50A-43	5943001101	43	800	480	±20%	12.7	7.9	6.35	Open in calculator for FT-50A-43
FT-50A-61	5961001101	61	125	75	±25%	12.7	7.9	6.35	Open in calculator for FT-50A-61
FT-50B-43	5943001901	43	800	965	±20%	12.7	7.9	12.7	Open in calculator for FT-50B-43
FT-50B-61	5961001901	61	125	150	±25%	12.7	7.9	12.7	Open in calculator for FT-50B-61
FT-82-43	5943000601	43	800	470	±20%	21	13.2	6.35	Open in calculator for FT-82-43
FT-82-61	5961000601	61	125	75	±25%	21	13.2	6.35	Open in calculator for FT-82-61
FT-100-43	5943001301	43	800	500	±20%	25.4	15.5	6.35	Open in calculator for FT-100-43
FT-114-43	5943001001	43	800	510	±20%	29	19	7.5	Open in calculator for FT-114-43
FT-114-61	5961001001	61	125	80	±25%	29	19	7.5	Open in calculator for FT-114-61
FT-114A-43	5943001201	43	800	950	±20%	29	19	13.85	Open in calculator for FT-114A-43
FT-114A-61	5961001201	61	125	145	±25%	29	19	13.85	Open in calculator for FT-114A-61
FT-125-43	5943001701	43	800	775	±20%	31.75	19.05	9.5	Open in calculator for FT-125-43
FT-125-61	5961001701	61	125	120	±25%	31.75	19.05	9.5	Open in calculator for FT-125-61
FT-140-43	5943002701	43	800	885	±20%	35.55	23	12.7	Open in calculator for FT-140-43
FT-140-61	5961002701	61	125	140	±25%	35.55	23	12.7	Open in calculator for FT-140-61
FT-240-43	5943003801	43	800	1075	±20%	61	35.55	12.7	Open in calculator for FT-240-43
FT-240-61	5961003801	61	125	170	±25%	61	35.55	12.7	Open in calculator for FT-240-61

Binocular cores

Source: Fair-Rite per-part product pages and datasheets (fair-rite.com). Dimensions are Fair-Rite's A/B/C/E/H, in mm. A_L is Fair-Rite's published minimum.

Core	Fair-Rite part	Mix	A_L min (nH/N²)	A	B	C	E	H	Calculator
BN-61-2302	2861002302	61	≥60	3.45	2.35	2	1.45	0.75	Open in calculator for BN-61-2302
BN-61-2702	2861002702	61	≥80	7	3.1	4.2	2.9	1.7	Open in calculator for BN-61-2702
BN-61-2402	2861002402	61	≥160	7	6.2	4.2	2.9	1.7	Open in calculator for BN-61-2402
BN-61-1502	2861001502	61	≥145	13.3	6.6	7.5	5.7	3.8	Open in calculator for BN-61-1502
BN-61-302	2861000302	61	≥230	13.3	10.3	7.5	5.7	3.8	Open in calculator for BN-61-302
BN-61-102	2861000102	61	≥300	13.3	13.4	7.5	5.7	3.8	Open in calculator for BN-61-102
BN-61-202	2861000202	61	≥320	13.3	14.35	7.5	5.7	3.8	Open in calculator for BN-61-202
BN-61-6802	2861006802	61	≥600	13.3	27	7.5	5.7	3.8	Open in calculator for BN-61-6802
BN-61-002	2861010002	61	≥800	30.2	28.7	15	14.6	6.8	Open in calculator for BN-61-002