Kool Mµ^® Ultra Cores

Lowest Losses and Superior DC Bias

New from Magnetics! Kool Mµ^® Ultra's ultra low losses approach that of ferrite cores while maintaining powder core advantages of soft saturation, stable high temperature performance, and no gap fringing losses. With DC Bias also superior to standard Kool Mµ and comparable to Kool Mµ Hf, Kool Mµ Ultra is a great choice for datacom and telecom applications.

Key Characteristics

Composition: Al • Si • Fe
Shapes: Toroid, E, Block, Cylinder, U
Sizes: Up to 133 mm
Permeability: 26µ, 40µ, 60µ
Coating Color: Black

For more information on Magnetics' new Kool Mµ Ultra toroids, view our technical bulletin.

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Property Curves

View Kool Mµ Ultra Material Property Curves including DC Magnetization, Core Loss Density curves, and Permeability versus DC Bias curves.

Kool Mµ Ultra Part Number Identification

How To Order: Magnetics Powder Cores

Kool Mu Ultra Toroids
Kool Mu Ultra E Cores
Kool Mu Ultra Blocks

Core Data	AL nH/T2 (nominal)			Le Path Length mm	Ae Cross Section mm2	Ve Volume mm3	OD max mm	ID min mm	HT max mm
Core Data	26µ	40µ	60µ	Le Path Length mm	Ae Cross Section mm2	Ve Volume mm3	OD max mm	ID min mm	HT max mm
050	12	18	27	31.2	10.9	340	13.46	6.99	5.51
120	15	24	35	41.2	19.2	791	17.27	9.52	7.11
380	19	28	43	41.4	23.2	960	18.03	9.02	7.11
206	14	21	32	50.9	22.1	1,120	21.08	12.07	7.11
310	19	29	43	56.7	31.7	1,800	23.62	13.34	8.38
350	22	34	51	58.8	38.8	2,280	24.33	13.77	9.65
930	32	50	75	63.5	65.4	4,150	27.69	14.10	11.94
426	30		69	66.5	72.7	4,840	30.00	17.40	10.90
548	28	41	61	81.4	65.6	5,340	33.66	19.46	11.43
585	16	25	38	89.5	46.6	4,150	35.18	22.56	9.78
324	24	37	56	89.8	67.8	6,090	36.70	21.54	11.35
395	53	81	122	95.1	153.7	14,617	40.94	21.27	17.89
254	35	54	81	98.4	107	10,600	40.77	23.32	15.37
454	47	72	108	102	147.5	15,100	43.84	23.39	17.27
089	37	57	86	116	134	15,600	47.63	27.89	16.13
438	59	90	135	107	199	21,300	47.63	23.32	18.92
725	76	117	175	114	262	29,700	51.51	24.00	21.59
715	32	49	73	127	125	15,900	51.69	30.94	14.35
540	45	69	104	126	174	22,000	54.90	28.10	15.30
109	33	50	75	143	144	20,700	58.04	34.75	14.86
195	60	92	138	125	229	28,600	58.04	25.58	16.13
596	54	83	125	143	237	33,900	60.60	33.00	20.50
620	82	126	189	144	360	51,800	63.09	31.70	25.91
070	65	100	143	158	314	49,700	69.42	34.67	21.41
778	88	135	205	177.2	492	81,500	78.94	38.33	26.85
740	88	136	204	184	497	91.400	75.21	44.40	35.92
866	30	45	68	196	176	34,500	78.94	48.21	13.84
906	37	57	85	196	221	43,400	78.94	48.21	17.02
102	48			243	358	86,900	103.00	55.75	17.91
337	68			324	678	220,000	133.96	77.19	26.80

Core Data	A_L nH/T² (nominal)		L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	Length max mm	Leg Length min mm	Height max mm
Core Data	26µ	40µ	L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	Length max mm	Leg Length min mm	Height max mm
4022	104	140	98.4	237	23,321	43.5	20.8	20.3
4317	88	119	77.5	152	11,800	41.5	16.2	12.7
5528	116	157	123	350	43,100	55.7	27.2	21.0
5530	138	187	123	417	51,400	55.7	27.2	25.0
6527	162	230	147	540	79,400	66.4	32.1	27.4
7228	130	173	137	368	50,400	73.5	27.4	19.4
8020	103	145	185	389	72,000	81.2	37.5	20.2
8044	91		208	389	80,900	81.2	44.0	20.2

Block Core Data	AL nH/T² (nominal)		Ve Volume mm³	Length mm	Width mm	Height mm
Block Core Data	26µ	40µ	Ve Volume mm³	Length mm	Width mm	Height mm
4741	PDF	PDF	53,600	47.5	41.0	27.5
6030	PDF	PDF	27,000	60.0	30.0	15.0
9541	PDF	PDF	107,200	95.0	41.0	27.5

Kool Mµ® Ultra Cores

Lowest Losses and Superior DC Bias

Key Characteristics

Property Curves

Kool Mµ Ultra Part Number Identification

Kool Mµ^® Ultra Cores