Soft Ferrites

Soft Ferrites

Soft Ferrites

Ferrites are polycrystalline oxides manufactured by ceramic technology and belong to a class of materials that exhibit the technically useful property of ferromagnetism. In a ferromagnetic material, magnetism occurs under the influence of an externally applied field. On removals of this field, material returns to its non-magnetic state. This behaviour is termed as magnetically “soft”.

The general composition of these soft ferrites is MeFe2O4, where Me represents one or several of the divalent transition metals such as Manganese (Mn), Zinc (Zn), Nickel (Ni), Copper (Cu), Iron (Fe) or Magnesium (Mg), the most popular being Manganese-Zinc (Mn-Zn) and Nickel-Zinc (Ni-Zn) ferrites. These compounds exhibit good magnetic properties below a certain temperature called the Curie Temp (Tc). These materials can be used up to very high frequencies without laminating. Ni-Zn ferrites have a very high receptivity and are most suitable for frequencies over 1 MHz however Mn-Zn ferrites exhibit higher permeability and saturation induction levels and are suitable up to 3 MHz.

Soft Ferrites

Lighting
Power Conditioning
EMI Filters
Solar
Automotive

E Cores

EFD (EFF) Cores

EP Cores

EPC (EFC) Cores

ER Cores

ETD Cores

I Cores

Planar (EI, EE) Cores

PM Cores

POT Cores

PQ Cores

PTS Cores

RM Cores

ROD Cores

Toroid (Ring) Cores

U Cores

UR Cores

EI Cores

EP Cores

ET Cores

Planar (EIH, EEH) Cores

POT Cores

PTS Cores

ROD Cores

Toroid (Ring) Cores

U Cores

UR Cores

UT Cores

BROADBAND TRANSFORMER MATERIALS

Material

Test

Temp

BROADBAND TRANSFORMER MATERIALS

Characterstics	Conditions	(°C)	CF265	CF255	CF195A	CF275	CF190	CF197	CF199
Initial Permeability	µ_iac	25	5000±20%	5500±25%	5000±20%	7000±25%	6000±20%	7000±20%	9000±30%
Saturation Flux Density	B_s (H=1kA/m)	100	320	310	260	240	280	260	260
Saturation Flux Density	B_s (H=1kA/m)	25	460	440	400	420	400	400	400
Relative Loss Factor(*10-6)	tand/µ_iac x 10^-6	10	≤5.0	≤5	≤5.0	≤5	≤5	≤7	≤20
		100	≤25	≤15	≤20	≤25	≤40	—	—
Hysteresis Material Constant(*10-6)	h_B	25	<1>	<0>	<0>	<0>	<1>	<1>	<0>
Relative Temp. Coefficient(*10-6)	a_F	25	—	-0.5-2.0	—	-0.5-2.0	—	—	—
Curie Temperature	T_C	1	≥160	>150	≥120	≥130	> 120	> 120	>115
Resistivity(Ohm m)		25	0.2	0.5	0.5	0.2	0.5	0.2	0.1
Density(gm/cc)		1	4.8	—	—	—	—	—	—

POWER TRANSFORMER MATERIALS

Material

Test

Temp

POWER TRANSFORM MATERIALS

Characterstics	Conditions	(°C)	CF140	CF196	CF124	CF130	CF292	CF139	CF297	CF295
Initial Permeability	µiac	25	2500±20%	2000+20%	2500±20%	3000±20%	1800+20%	2100±20%	2300±20%	3000+20%
Saturation Flux Density	10khz\1kA/m)	100	310	400	390	410	440	390	410	410
Saturation Flux Density	10khz\1kA/m)	25	390	500	490	520	500	490	510	525
Remanent Flux Density		25	110	210	200	200	180	—	—	80
Power Loss Density(KW/m³)	16kHz/200 mT	100	—	≤110	≤90	—	—	—	—	80
	16kHz/200 mT	25	—	≤120	≤100	—	—	—	—	—
	25kHz/ 200 mT	100	—	≤140	≤130	—	—	—	—	—
	25kHz/ 200 mT	25	—	≤160	≤150	—	—	—	—	—
	Pc (100kHz) 100 mT	100	—	—	—	—	≤100	≤60	—	—
	Pc (100kHz) 100 mT	25	—	—	—	—	—	—	—	—
	100kHz/200 mT	100	—	—	—	≤800	≤500	≤380	≤350	≤350
	100kHz/200 mT	25	—	—	—	≤390	—	—	≤600	≤400
Curie Temperature		1	>150	≥200	≥220	>220	> 240	>210	>210	>210
Resistivity(Ohm m)		25	1	0.4	0.5	3	6	8.0	8	5
Density(gm/cc)		25	4.8	4.8	4.8	4.8	4.8	4.8	4.85	4.85