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Powder Cores

Kool Mu Cores

Kool Mµ^® material’s low loss and relatively high saturation level (10,500 gauss) make it excellent for use in power factor correction circuits (PFC) as well as unidirectional drive applications such as Pulse Transformers and Flyback Transformers. The near zero magnetostriction makes Kool Mµ ideal for eliminating audible frequency noise in In-Line Noise Filters and Inductors.

Learn more about Kool Mu cores including applications and the advantages of Kool Mu cores versus Powdered Iron and gapped ferrite E cores.

View Kool Mµ Material Property Curves

Kool Mu Toroid

	A_L nH/T² (nominal)
Core Data	26µ	40µ	60µ	75µ	90µ	125µ	L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	OD max mm	ID min mm	HT max mm
140			13	16	19	26	8.06	1.30	10.48	4.19	1.27	2.16
150			17		25	35	9.42	2.11	19.88	4.57	1.73	3.18
180			20		30	42	10.62	2.85	30.27	5.11	2.03	3.18
020			24	30	36	50	13.61	4.82	65.6	6.99	2.29	3.43
240					39	54	13.63	4.76	64.9	7.06	2.16	3.00
270			50	62	74	103	13.63	9.12	124.3	7.24	2.16	5.41
410					50	70	16.5	7.25	119.6	7.32	3.63	5.72
030			25	31	37	52	17.9	6.02	107.8	8.51	3.45	3.81
280			25	32	38	53	21.8	7.51	163.7	10.3	4.27	3.81
290			32		48	66	21.8	9.45	206	10.3	4.27	4.60
040			32		48	66	23	9.76	225	10.8	4.57	4.60
130			26	32	38	53	26.9	9.27	249	11.8	5.84	4.60
050	12		27	34	40	56	31.2	11.70	365	13.5	6.99	5.51
120			35	43	52	72	41.2	19.56	806	17.3	9.53	7.11
380			43	53	64	89	41.4	23.20	960	18.0	9.02	7.11
206		21	32	41	49	68	50.9	23.47	1,194	21.1	12.1	7.11
310	19	29	43	54	65	90	56.7	32.85	1,863	23.6	13.3	8.4
350	22	34	51	63	76	105	58.8	38.80	2,281	24.3	13.8	9.7
930	32	50	75	94	113	157	65.4	66.1	4,322	27.7	14.1	11.9
548	28	41	61	76	91	127	81.4	67.7	5,509	33.8	19.3	11.4
585	16	25	38	47	57	79	89.5	47.1	4,215	35.2	22.6	9.8
324	24	37	56	70	84	117	89.8	68.3	6,136	36.7	21.5	11.4
254	35	54	81	101	121	168	98.4	110.6	10,880	40.8	23.3	15.4
089	37	57	86	107	128	178	116.3	133.3	15,502	47.6	27.9	16.1
438	59	90	135	169	202	281	107.4	197.7	21,235	47.6	23.3	18.9
715	32	49	73	91	109	152	127.3	124.4	15,832	51.7	30.9	14.4
109	33	50	75	94	112	156	143	146.3	20,918	58.0	34.7	14.9
195	60	92	138	172	207	287	125	229	28,625	58.0	25.6	16.1
866	30	45	68				199.5	176	35,112	78.9	48.2	13.8
906	37	57	85				199.5	227	45,287	78.9	48.2	17.0

Kool Mu E Core

	A_L nH/T² (nominal)
Core Data	26µ	40µ	60µ	90µ	L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	Length max mm	Leg Length min mm	Height max mm
1808	26	35	48	69	40.1	22.8	914	19.6	8.28	4.93
2510	39	52	70	100	48.5	38.5	1,867	25.8	9.70	6.45
3007	40	54	75	106	65.6	60.1	3,943	30.6	15.2	7.21
3515	56	75	102	146	69.4	84	5,830	35.1	14.4	9.53
4017	56	76	105	151	98.4	128	12,595	43.5	21.4	11.0
4020	80	108	150	217	98.4	183	18,007	43.5	21.4	15.7
4022	104	140	194	281	98.4	237	23,321	43.5	21.4	20.3
4317	88	119	163	234	77.5	152	11,780	41.5	16.8	12.7
5528	116	157	219	322	123	350	43,050	55.7	28.0	21.0
5530	138	187	261	338	123	417	51,291	55.7	28.0	25.0
6527	162	230	300		147	540	79,380	66.4	32.9	27.4
7228	130	173	236		137	368	50,416	73.5	28.4	19.4
8020	103	145	190		185	389	71,965	81.2	38.7	20.2
8044	91				208	389	80,912	80.9	45.2	20.2
130LE	254				219	1080	236,520	134.1	32.8	55.1
160LE	180				273	778	212,394	162.6	38.7	40.9

Kool Mu U Core

	A_L nH/T² (nominal)
Core Data	26µ	40µ	60µ	90µ	L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	Length max mm	Leg Length min mm	Height max mm
3112			111		65.6	101	6,620	31.8	11.4	12.4
4110			77.5		85.2	80	6,816	41.1	11.7	9.91
4111			95		85.2	101	8,605	41.1	11.4	12.4
4119		110	151	218	85.2	160	13,632	41.1	11.4	19.4
5527	67				168	172	28,896	55.5	28.1	16.6
5529	85				168	244	40,992	55.5	28.1	23.5
6527	89		165		219	270	59,130	66.5	32.8	27.4
6533	82				199	250	49,750	66.5	32.8	20.4
7228	130				137	368	50,416	73.5	28.4	19.4
7236	87				219	290	63,510	73.3	36.2	21.2
8020	64				273	195	53,235	80.9	38.7	20.2
8038	97		179		237	354	83,898	80.9	38.7	23.4

Kool Mu Segment

	A_L nH/T² (nominal)
Core Data	26µ	40µ	60µ	90µ	L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	OD mm	ID mm	HT mm
102TC	47.9				242.7	356	47,900	101.6	57.2	16.51
102RT	29.8				357	356	29,800	101.6	57.2	16.51
102AR	-									16.51
102IS	-									16.51
133TC	67.4				324.3	669	67,400	132.5	78.6	25.4
133RT	45.9				476.7	669	45,900	132.5	78.6	25.4
133AR	-									25.4
133IS	-									25.4

Kool Mu Block

	A_L nH/T² (nominal)
Core Data	26µ	40µ	60µ	90µ	L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	Length mm	Width mm	Height mm
4741	-		-				53,600	47.5	41.0	27.5
5528	-	-	-				31,200	54.9	27.6	20.6
6030	-			-			27,000	60.0	30.0	15.0

Each Magnetics part has a unique ordering code that identifies material, shape, size and finish. Below is an overview of the ordering code for Kool Mµ cores.

RoHS Compliant