Kool Mµ^® MAX Cores

HIgh DC Bias for Better Power Handling

Kool Mµ MAX is the next generation of sendust cores from Magnetics. We supercharged our low core loss Kool Mµ material with 50% better DC bias performance for better power handling. Use of copper wire is minimized by maintaining inductance using less turns, resulting in savings in overall component cost. With its super low losses, Kool Mμ MAX does not mimic the temperature rise problems found in iron powder cores. Improve inductor efficiency at a fraction of the cost of High Flux with Kool Mµ MAX.

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Key Characteristics

Composition: Al • Si • Fe
Shapes: Toroid, E, U, Block, EQ, LP, EER, Cylinder
Sizes: 13.5 mm to 165 mm
Permeability: 14µ, 19µ, 26µ, 40µ, 60µ, 75µ, 90µ
Coating Color: Black

Property Curves

View Kool Mµ MAX Material Property Curves including Normal Magnetization curves, Core Loss Density curves, Permeability versus Temperature curves, Permeability versus DC Bias curves, and Permeability versus Frequency curves.

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

Kool Mµ MAX Part Number Identification

How To Order: Magnetics Powder Cores

Kool Mμ MAX Toroids
E Cores
U Cores
EQ Cores
LP Cores
EER Cores
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	14µ	19µ	26µ	40µ	60µ	75µ	90µ	Le Path Length mm	Ae Cross Section mm2	Ve Volume mm3	OD max mm	ID min mm	HT max mm
050	6	9	12	18	27	34	40	31.2	10.9	340	13.46	6.99	5.51
120	8	11	15	24	35	43	52	41.2	19.2	790	17.27	9.52	7.11
380	10	14	19	28	43	53	64	41.4	23.2	960	18.03	9.02	7.11
206	7	10	14	21	32	41	49	50.9	22.1	1,120	21.08	12.07	7.11
310	9	14	19	29	43	54	65	56.7	31.7	1,800	23.62	13.34	8.38
350	12	16	22	34	51	63	76	58.8	38.8	2,280	24.33	13.77	9.65
930	18	23	32	50	75	94	113	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	14	20	28	41	61	76	91	81.4	65.6	5,340	33.66	19.46	11.43
585	9	12	16	25	38	47	57	89.5	46.6	4,150	35.18	22.56	9.78
324	13	18	24	37	56	70	84	89.8	67.8	6,090	36.70	21.54	11.35
395	28	39	53	81	122			95.1	153.7	14,617	40.94	21.27	17.89
254	19	26	35	54	81	101	121	98.4	107	10,600	40.77	23.32	15.37
454	25	35	47	72	108			102	147.5	15,100	43.84	23.39	17.27
089	20	27	37	57	86			116	134	15,600	47.63	27.89	16.13
438	32	43	59	90	135			107	199	21,400	47.63	23.32	18.92
725	41	56	76	117	175			114	262	29,700	51.51	24.00	21.59
715	17	23	32	49	73			127	125	15,900	51.69	30.94	14.34
540	24	33	45	69	104			126	174	22,000	54.90	28.10	15.30
109	18	24	33	50	75			143	144	20,700	58.04	34.75	14.86
195	32	44	60	92	138			125	229	28,600	58.04	25.58	16.13
596	29	39	54	83	125			143	237	33,900	60.60	33.00	20.50
620	44	60	82	126	189			144	360.2	51,900	63.09	31.70	25.91
070	33	48	65	100	143			158	314	49,700	69.42	34.67	21.41
778	47	64	88	135	205			177.2	492	81,500	78.94	38.33	26.85
740	48	64	88	136	204			183.8	497	91,300	75.21	44.40	35.92
866	16	22	30	45	68			196	176	34,500	78.94	48.21	13.84
906	20	27	37	57	85			196	221	43,400	78.94	48.21	17.02
102	26	35	48	74	111			243	358	86,900	103.00	55.75	17.91
337	37	50	68					324	678	220,000	133.96	77.19	26.80
165	42							412	987	407,000	166.50	101.02	33.15

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	60µ	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	40.1	22.8	914	19.3	8.1	4.8
2510	39	52	70	48.5	38.5	1,870	25.4	9.5	6.35
3007	33	46	71	65.6	60.1	3,940	30.1	15	7.1
3515	56	75	102	69.4	84	5,830	34.54	14.15	9.35
4017	56	76	105	98.4	128	12,600	42.85	21.1	10.8
4020	80	108	150	98.4	183	18,007	43.5	20.8	15.7
4022	104	140	194	98.4	237	23,321	43.5	20.8	20.3
4317	88	119	163	77.5	152	11,800	41.5	16.2	12.7
5528	116	157	219	123	350	43,100	55.7	27.2	21.0
5530	138	187	261	123	417	51,400	55.7	27.2	25.0
6527	162	230	300	147	540	79,400	66.4	32.1	27.4
7228	130	173	235	137	368	50,400	73.5	27.4	19.4
8020	103	145	190	185	389	72,000	81.2	37.5	20.2
8024	200	275	370	131.4	600	78,800	80	24.1	29.7
8044	91	113	170	208	389	80,900	81.2	44.0	20.2
114LE	235	335	445	215	1,220	262,000	114.3	46.2	34.9
130LE	254			219	1,080	237,000	130.3	32.5	53.85
160LE	180			273	778	212,000	160	38.1	39.6

Core Data	AL nH/T2 (nominal)			Le Path Length mm	Ae Cross Section mm2	Ve Volume mm3	Length max mm	Leg Length min mm	Height max mm
Core Data	26µ	40µ	60µ	Le Path Length mm	Ae Cross Section mm2	Ve Volume mm3	Length max mm	Leg Length min mm	Height max mm
3112	61	92	111	65.6	101	6,630	31.8	10.9	12.5
4110	42	56	78	85.2	80	6,820	41.2	10.7	9.9
4111	52	72	95	85.2	101	8,610	41.2	10.9	12.5
4119	79	110	151	85.2	159	13,500	41.2	10.9	19.4
5527	67	95	120	168	172	28,900	55.5	27.1	16.7
5529	85	121	160	168	244	41,000	55.5	27.1	23.5
6527	89	111	145	219	270	59,100	66.0	32.2	27.4
6533	82	109	143	199	250	49,800	66.0	32.2	20.4
7236	87	114	149	219	290	63,500	73.3	34.9	21.3
8020	64	77	95	273	195	53,200	80.9	37.5	20.2
8038	97	124	179	237	354	83,900	80.9	37.5	23.4

Core Data	A_L nH/T² (nominal)				L_e Path Length mm	A_eCross Section mm²	Length mm	Height mm	Width mm
Core Data	26µ	40µ	60µ	75µ	L_e Path Length mm	A_eCross Section mm²	Length mm	Height mm	Width mm
EQY20 L050	81	120	167	203	29.3	60.8	20.0	5.0	14.0
EQY20 L061	67	98	138	168	35.8	60.8	20.0	6.1	14.0
EQY26 L070	111				42.3	119.8	26.5	7.0	19.0
EQY26 L088	95				49.5	119.8	26.5	8.8	19.0
EQY26 L101	86				54.7	119.8	26.5	10.1	19.0
EQY26 L124	74				63.9	119.8	26.5	12.4	19.0
EQY32 L101	100				59.5	152.3	32.0	10.1	22.0
EQY32 L152	75		156		79.9	152.3	32.0	15.2	22.0
EQY32 L180	66				91.1	152.3	32.0	18.0	22.0
EQY36 L100	109	160	223	272	65.1	180.8	36.0	10.0	26.0
EQY36 L110	102	151	211	256	69.1	180.8	36.0	11.0	26.0
EQY36 L174	75	110	154	187	94.7	180.8	36.0	17.4	26.0
EQY41 L120	94	138	193	234	83.6	199.7	41.5	12.0	28.0
EQY41 L199	68	100	140	163	115.2	199.7	41.5	19.9	28.0
EQY50 L200	109	160	223	271	113.4	314.1	50.0	20.0	32.0
EQY50 L250	92	136	190	231	133.4	314.1	50.0	25.0	32.0

Core Data	A_L nH/T² (nominal)				L_e Path Length mm	A_e Cross Section mm²	Length mm	Height mm	Width mm
Core Data	26µ	40µ	60µ	75µ	L_e Path Length mm	A_e Cross Section mm²	Length mm	Height mm	Width mm
LPY23 L087	54	79	110	134	49.1	67.0	23.4	8.7	14.0
LPY25 L099	68				55.7	96.0	25.0	9.9	18.0
LPY30 L118	65				68.0	114.0	30.0	11.8	20.0
LPY32 L152	69				82.1	143.0	32.0	15.2	22.0
LPY36 L144	86	127	177		80.6	177.0	36.2	14.4	24.0
LPY42 L107	116	171	239	290	69.7	206.0	42.0	10.7	25.0
LPY42 L123	106	156	218	265	76.1	206.0	42.0	12.3	25.0
LPY42 L158	90	132	184	224	90.1	206.0	42.0	15.8	25.0

Core Data	A_L nH/T² (nominal)			L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	Length mm	Height mm	Width mm
Core Data	26µ	40µ	60µ	L_e Path Length mm	A_e Cross Section mm²	V_e Volume mm³	Length mm	Height mm	Width mm
ERY25 L110	34	47	65	57.8	45.0	2,600	25.5	11.0	7.5
ERY40 L224	59	81	111	111.3	149.1	16,600	40.0	22.4	13.3

Block Core Data	AL nH/T² (nominal)			Ve Volume mm³	Length mm	Width mm	Height mm
Block Core Data	26µ	40µ	60µ	Ve Volume mm³	Length mm	Width mm	Height mm
4741	PDF	PDF	PDF	53,600	47.5	41.0	27.5
5030	PDF	PDF	PDF	23,000	50.5	30.3	15.0
5528	PDF	PDF	PDF	31,200	54.9	27.6	20.6
6020				56600	60.5	20.3	20.0
6030	PDF	PDF	PDF	27,000	60.0	30.0	15.0
6131	PDF	PDF	PDF	36,700	60.5	30.3	20.0
7020	PDF	PDF	PDF	28,600	70.5	20.3	20.0
7030	PDF	PDF	PDF	42,800	70.5	30.3	20.0
8020	PDF	PDF	PDF	32,700	80.5	20.3	20.0
8030	PDF	PDF	PDF	48,800	80.5	30.3	20.0
9541	PDF	PDF	PDF	107,200	95.0	41.0	27.5

Kool Mµ® MAX Cores

HIgh DC Bias for Better Power Handling

Key Characteristics

Property Curves

Kool Mµ MAX Part Number Identification

Kool Mµ^® MAX Cores