Ferrite  Core 

       Selection of ferrite magnetic core: According to the frequency of interference to be suppressed, select ferrite materials with different permeability. The higher the permeability of ferrite, the larger the impedance of low frequency and the smaller the impedance of high frequency. According to different requirements, different processes can be selected to manufacture magnetic rings. The magnetic core  has different impedance characteristics at different frequencies, and the impedance is generally very small at low frequencies, and the impedance of the magnetic ring increases sharply when the signal frequency increases

EQ CORES

Type	Dimensions (mm)								Fig	Weight (g/set)
	A	B	C	D1	D2	E	F	B-F
EQ23	23.0±0.5	7.9±0.2	18.0±0.3	20.0±0.5	14.5min	11.0±0.2	5.3±0.2	2.6±0.15	I	23.3
EQ25	25.0±0.5	7.4±0.2	18.0±0.3	22.0±0.5	16.5min	11.0±0.2	4.8±0.2	2.6±0.15	I	22.3
EQ27	27.0±0.4	6.8±0.15	17.5±0.3	23.5min	18.75min	11.2±0.2	4.4±0.15	2.4±0.2	I	22.1
EQ30	30.0±0.6	6.7±0.2	20.0±0.3	26.4±0.5	20.3min	11.0±0.2	4.0±0.2	2.7±0.2	I	28.4
EQ30A	30.0±0.6	8.2±0.2	20.0±0.3	26.4±0.5	20.3min	11.0±0.2	5.6±0.2	2.6±0.2	I	33.5
EQ31	31.8±0.5	20.15±0.25	27.6±0.3	12.5±0.2	21.5±0.35	6.85±0.1	2.75±0.15	4.15±0.15	I	31
EQ33	32.8±0.5	7.25±0.2	20.3±0.3	27.6min	23.0min	13.1±0.25	4.25±0.25	3.0±0.2	I	35.3
EQ33A	33.0±0.5	5.2±0.15	23.5±0.4	29.1±0.4	22.6±0.5	12.5±0.25	3.1±0.15	2.1±0.15	I	28.5
EQ33B	33.6±0.4	5.55±0.15	23.5±0.3	28.7min	20.0min	12.5±0.2	3.2±0.2	2.35±0.2	I	32.5
EQ34	34.0±0.5	6.9±0.15	25.0±0.4	30.2±0.5	26.0±0.5	14.8±0.2	3.9±0.19	3.0±0.2	I	43.3
EQ56	55.8±0.5	3.0±0.15	47.8±0.5	48.2±0.5	25.0±0.5	20.0±0.3	0.5±0.15	2.5±0.15	Ⅱ	105.4

Type	Parameters				AL-value(1±25%)/(nH/N²)
					1kHz,0.25V,10Ts,25±3℃
	C₁ (mm-1)	Le (mm)	Ae (mm²)	Ve (mm³)	KY30	KY301	KY302	KY303	KY404
EQ23	0.42	39.8	94.5	3761	5300	5300	5600	5600	7400
EQ25	0.43	41	94.5	3875	4800	4800	5000	5000	6850
EQ27	0.44	39.7	89.5	3555	4900	4900	5200	5200	6900
EQ30	0.36	39.2	108.8	4265	5500	5500	5800	5800	7300
EQ30A	0.43	45.1	105.6	4766.7	5400	5400	5700	5700	7600
EQ31	0.34	40.38	119.85	4840	5800	5800	6100	6100	8400
EQ33	0.33	39.46	119.28	5587	7200	7200	7500	7500	10300
EQ33A	0.36	39.5	110.8	4379.9	7500	7500	7800	7800	10500
EQ33B	0.32	38.8	119.5	4635.3	8000	8000	8250	8250	11500
EQ34	0.27	43	157.5	6776	8600	8600	8900	8900	11500
EQ56	0.18	45.4	254.8	11576	11500	11500	12500	12500	16500