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G&M Golden Mangetic Technology ( Shenzhen ) Co., LTD.

Tel:+86-755-86332949 Fax: +86-755-26406857

Address:Unit 603, block A huachuangda building, Baoan District, Shenzhen, Guangodng

G&M Golden Magnetic Technology (Hongkong ) Co.,Ltd.

Tel:+852-29477355 Fax:+852-29477356

Office Address:1101 Leader industry center, No.57-59 An pui wan Street, Fotan, Shatin, Hongkong

Factory Add:118 Liangtian Zone, Taimei town, Boluo disrict, huizhou city, guangdong province

E-mail:Daniel@goldenmagnetic.com

Alloy Powder Core for Amplifier Inductor

Sendust Core is made from 6%Al,9%Si and 85%Fe. It is mainly used to replace iron powder core as its core loss is 80% less than the powdered iron, so it can be applied with the frequency above 8kHz.

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Physical Dimensions

OD	Bare Core Nominal	77.8 mm	3.063 in
OD	Coated Core (max)	78.94 mm	3.108 in
ID	Bare Core Nominal	49.23 mm	1.938 in
ID	Coated Core (min)	47.96 mm	1.888 in
Ht	Bare Core Nominal	15.88 mm	0.625 in
Ht	Coated Core (max)	17.15 mm	0.675 in

Magnetic Dimensions

Ae	Eﬀective Magnetic Cross Section 2.22 cm²
Le	Eﬀective Magnetic Path Length 19.612 cm
Ve	Eﬀective Core Volume 43.5 cm³
WA	Minimum Eﬀective Window Area 18.1 cm²
SA	Surface Area 193 cm²
MLT	Mean Length Per Turn 8.93 cm

Permeability

Reference Perm.	AL Value(nH/N²)	AS Sendust	AF Fe-Si	APH Super Sendust	AH High Flux
14µ	19.9	AS778014	AF778014	APH778014	AH778014
26µ	37	AS778026	AF778026	APH778026	AH778026
40µ	57	AS778040	AF778040	APH748040	AH778040
60µ	85	AS778060	AF778060	APH778060	AH778060
75µ	107	AS778075	AF778075	APH748075	AH778075
90µ	128	AS778090	AF778090	APH748090	AH778090
125µ	178	AS778125	AF778125		AH778125
147µ	209	AS778147			AH778147
Approx. Unit Weight:		250 g	300 g	240 g	300 g

Test Conditions

Winding	N=120, #18 AWG
Frequency	10 kHz
Voltage	1.2 V
AL Tolerance	±8%

Magnet Wire Winging Data

Wire Size	AWG	8	10	12	14	16	18	20	22	24	26	28
Wire Size	mm	3.150	2.500	2.000	1.600	1.250	1.000	0.800	0.630	0.500	0.400	0.315
Single Layer	Turns	38	48	60	75	95	118	148	185	230	287	358
Single Layer	Rdc(Ω)	7.0 m	14.0m	27.9m	55.4 m	111.5m	220.3m	439.5m	873.8m	1.7	3.4	6.8
Full Winding	Turns	95	146	227	351	543	840	1,300	2,012	3,114	4,820	7,459
Full Winding	Rdc(Ω)	17.4m	42.6m	105.4m	259.1m	637.6m	1.6	3.9	9.5	23.4	57.6	141.7

Coating/Packaging Information

Coating Type	Black Epoxy
Voltage Breakdown	2500 Vrms
Limit	0.1 mA, 5 s
Package Quantity	54 Pcs/Box

G&M is able to customize the design to meet customers’ requirements.

Sendust Cores(AS):

Sendust is a magnetic metal powder that was invented by Hakaru Masumoto at Tohoku Imperial University in Sendai, Japan, about 1936 as an alternative to permalloy in inductor applications for telephone networks. Sendust composition is typically 85% iron, 9% silicon and 6% aluminum. The powder is sintered into cores to manufacture inductors. Sendust cores have high magnetic permeability (up to 140 000), low loss, low coercivity (5 A/m) good temperature stability and saturation flux density up to 1 T.

Due to its chemical composition and crystallographic structure Sendust exhibits simultaneously zero magnetostriction and zero magnetocrystalline anisotropy constant K1.

Sendust is harder than permalloy, and is thus useful in abrasive wear applications such as magnetic recording heads.