Grades and magnetic properties – Insky | Custom Magnets & Assemblies

Read the grade before comparing values.

For a common sintered grade such as N42SH, the number identifies an energy-product class. The suffix identifies a coercivity family relevant to temperature selection. A higher number is not always the best fit.

Br · Remanence

Flux density remaining after saturation when the applied field returns to zero; not a surface-probe reading.

HcB · Normal coercivity

Reverse field needed to reduce flux density B to zero.

HcJ · Intrinsic coercivity

Reverse field needed to reduce magnetic polarization J to zero; related to resistance to demagnetization.

(BH)max · Maximum energy product

Maximum magnitude of the B–H product on the demagnetization curve; not a direct measure of holding force.

Common sintered grade references.

Grade	Remanence BrkGs	Normal coercivity HcBkOe	Intrinsic coercivity HcJkOe	Energy product (BH)maxMGOe	Hk/HcJ	Reference temperature℃	Br temperature coefficient%/℃	HcJ temperature coefficient%/℃
N40	12.6～13.2	≥10.8	≥12	38～41	≥0.95	≤80	-0.09～-0.124	-0.7～-0.82
N42	12.9～13.5	≥10.8	≥12	40～43	≥0.95	≤80	-0.09～-0.124	-0.7～-0.82
N45	13.3～13.9	≥10.8	≥12	43～46	≥0.95	≤80	-0.09～-0.124	-0.7～-0.82
N48	13.7～14.3	≥10.5	≥12	45～49	≥0.95	≤80	-0.09～-0.124	-0.7～-0.82
N50	13.9～14.6	≥10.5	≥12	47～51	≥0.95	≤75	-0.09～-0.124	-0.7～-0.82
N52	14.2～14.8	≥10.5	≥12	49～53	≥0.95	≤70	-0.09～-0.124	-0.7～-0.82
N54	14.5～15.1	≥10.5	≥11	51～55	≥0.95	≤60	-0.09～-0.124	-0.7～-0.82
N35M	11.8～12.5	≥10.8	≥14	33～36	≥0.95	≤100	-0.09～-0.124	-0.65～-0.8
N38M	12.3～13.0	≥11	≥14	36～39	≥0.95	≤100	-0.09～-0.124	-0.65～-0.8
N40M	12.6～13.2	≥11.4	≥14	38～41	≥0.95	≤100	-0.09～-0.124	-0.65～-0.8
N42M	12.9～13.5	≥11.8	≥14	40～43	≥0.95	≤100	-0.09～-0.124	-0.65～-0.8
N45M	13.3～13.9	≥12.2	≥14	43～46	≥0.95	≤100	-0.09～-0.124	-0.65～-0.8
N48M	13.7～14.3	≥12.7	≥14	45～49	≥0.95	≤100	-0.09～-0.124	-0.65～-0.8
N50M	13.9～14.6	≥13	≥14	47～51	≥0.95	≤95	-0.09～-0.124	-0.65～-0.8
N52M	14.2～14.8	≥12.5	≥14	49～53	≥0.95	≤90	-0.09～-0.124	-0.65～-0.8
N54M	14.5～15.1	≥12.5	≥14	51～55	≥0.95	≤85	-0.09～-0.124	-0.65～-0.8
N40H	12.6～13.2	≥11.7	≥17	38～41	≥0.95	≤120	-0.09～-0.124	-0.6～-0.75
N42H	12.9～13.5	≥12	≥17	40～43	≥0.95	≤120	-0.09～-0.124	-0.6～-0.75
N45H	13.3～13.9	≥12.5	≥17	43～46	≥0.95	≤120	-0.09～-0.124	-0.6～-0.75
N48H	13.7～14.3	≥12.8	≥17	45～49	≥0.95	≤120	-0.09～-0.124	-0.6～-0.75
N50H	13.9～14.6	≥13	≥17	47～51	≥0.95	≤115	-0.09～-0.124	-0.6～-0.75
N52H	14.2～14.8	≥12.5	≥17	49～53	≥0.95	≤110	-0.09～-0.124	-0.6～-0.75
N54H	14.5～15.1	≥12.5	≥17	51～55	≥0.95	≤105	-0.09～-0.124	-0.6～-0.75
N40SH	12.6～13.2	≥11.5	≥20	38～41	≥0.9	≤150	-0.09～-0.122	-0.55～-0.7
N42SH	12.9～13.5	≥11.8	≥20	40～43	≥0.9	≤150	-0.09～-0.122	-0.55～-0.7
N45SH	13.3～13.9	≥12.4	≥20	43～46	≥0.9	≤150	-0.09～-0.122	-0.55～-0.7
N48SH	13.7～14.3	≥12.8	≥20	45～49	≥0.9	≤150	-0.09～-0.122	-0.55～-0.7
N50SH	13.9～14.6	≥13	≥20	47～51	≥0.9	≤145	-0.09～-0.122	-0.55～-0.7
N52SH	14.2～14.8	≥13	≥20	49～53	≥0.9	≤140	-0.09～-0.122	-0.55～-0.7
N28UH	10.5～11.2	≥9.5	≥25	26～29	≥0.9	≤180	-0.09～-0.12	-0.53～-0.66
N40UH	12.6～13.2	≥11.5	≥25	38～41	≥0.9	≤180	-0.09～-0.12	-0.53～-0.66
N42UH	12.9～13.5	≥11.8	≥25	40～43	≥0.9	≤180	-0.09～-0.12	-0.53～-0.66
N45UH	13.3～13.9	≥12.2	≥25	43～46	≥0.9	≤180	-0.09～-0.12	-0.53～-0.66
N40EH	12.5～13.1	≥11.9	≥30	37～41	≥0.9	≤200	-0.09～-0.12	-0.5～-0.62
N42EH	12.8～13.4	≥12.2	≥30	39～43	≥0.9	≤200	-0.09～-0.12	-0.5～-0.62
N28TH	10.5～11.2	≥9.5	≥35	26～29	≥0.9	≤230	-0.09～-0.12	-0.47～-0.6
N30TH	10.8～11.5	≥10.1	≥35	28～31	≥0.9	≤230	-0.09～-0.12	-0.47～-0.6
N33TH	11.4～12.1	≥10.2	≥35	31～34	≥0.9	≤230	-0.09～-0.12	-0.47～-0.6
N35TH	11.8～12.5	≥10.6	≥35	33～36	≥0.9	≤230	-0.09～-0.12	-0.47～-0.6
N38TH	12.2～12.8	≥11.6	≥35	35～39	≥0.9	≤230	-0.09～-0.12	-0.47～-0.6

Reference temperatures are selection information, not guaranteed limits for every geometry. Demagnetization also depends on shape, circuit, opposing fields and conditions. Curie temperature is not the permitted operating temperature.

Injection-bonded materials.

Grade	Magnetic powder	Polymer	Remanence BrG	Normal coercivity HcBOe	Intrinsic coercivity HcJOe	Energy product (BH)maxMGOe	Br temperature coefficient%/℃	HcJ temperature coefficient%/℃	Relative recoil permeabilityμrec	Densityg/cm³	Reference max. temperature℃
N801	NdFeB	PPS	4480	3610	8560	4.48	-0.11	-0.4	1.13～1.22	4.60	≤180
N802	NdFeB	PPS	4980	3790	8560	4.99	-0.11	-0.4	1.13～1.22	5.00	≤180
N803	NdFeB	PPS	5100	4410	11700	5.58	-0.11	-0.4	1.13～1.22	5.18	≤180
N804	NdFeB	PPS	5000	4100	10000	5.40	-0.11	-0.4	1.13～1.22	5.26	≤180
N805	NdFeB	PPS	6750	5700	13500	10.50	-0.11	-0.56	1.10～1.20	4.65	≤180
N806	NdFeB	PA12	4540	3710	7820	4.20	-0.13	-0.4	1.13～1.22	4.85	≤150
N807	NdFeB	PA12	4950	4050	7900	5.10	-0.13	-0.4	1.13～1.22	5.02	≤150
N808	NdFeB	PA12	5560	4550	9000	6.30	-0.13	-0.4	1.13～1.22	5.37	≤150
N809	NdFeB	PA12	5800	4780	9020	6.90	-0.13	-0.4	1.13～1.22	5.45	≤150
N810	NdFeB	PA12	8200	6700	13500	15.00	-0.11	-0.56	1.10～1.20	5.10	≤150
N811	NdFeB	PA12	6200	4850	9200	7.50	-0.13	-0.4	1.13～1.22	5.45	≤150

Material codes distinguish powder and polymer formulations and are not sintered grades. Review reference temperatures against geometry, magnetic circuit and operating conditions.