Ferrite Cores

Ferrite Material Specification and Characteristics

TDK and EPCOS are essentially one company. However the manufacture of ferrite between the entities remains separate. TDK produces ferrite primarily in Xiamen, China. Ferrite manufacturing in Japan has essentially ceased as of 2013. EPCOS manufacturers ferrite in Sumperk, Czech Republic and Kalyani, India. PC47 material is the first material to become common between both companies and is available. now.

The graphs below compare the core loss and power loss for ferrite materials.

(click graph to zoom)

: Wideband Ferrite Core Loss vs Temp

: Ferrite Core Loss vs Temp

: Ferrite Power Loss vs Temp

Need help selecting a material? Follow this link:

Ferrite Material Selection Guide

For a discussion of power applications above 400KHz, please follow this link:

Power Applications Greater Than 400KHz

The preferred power materials for future development are:

For TDK:

PC47 and PC95 for transformer
PC90 for inductors

For Epcos:

N87, N95 and N96 for transformer
N92 for inductors.

For ACME:

P45 and P48 for transformer
P49 for inductors
P51 for transformers >1MHz
P6 for transformers >2MHz
A05 and A10 for Common Mode Choke

Ferrite Power Material Specification For Transformer and Inductor

TDK and Epcos


	Man Mat KHz	Initial Perm	Freq	β_sat	°C	Core Loss	°C
Epcos	N27	2000	25< f<100	500	25	–
				410	100	920	100	100 KHz, 200mT
TDK	PC40	2200	25< f<300	510	25	600	25	100 KHz, 200mT	215
				450	60	450	60
						400	80
				390	100	410	100
				350	120	500	120
Epcos	N87	2200	25< f<300	490	25	650	25	100 KHz, 200mT	210
						500	50
						400	80
						375	100
				390	100	460	120
						540	100
Epcos Preliminary	N88	1800	25< f<500	500	25	750	25	100 KHz, 200mT	240
						580	50
						460	80
						450	100
				400	100	400	120
						420	100
TDK	PC44	2300	25< f<500	510	25	600	25	100 KHz, 200mT	215
				450	60	400	60
						320	80
				390	100	300	100
				350	120	380	120
Epcos	N97	2300	25< f<500	510	25	–
				410	100	300	100	100 KHz, 200mT
TDK	PC47	2400	25< f<500	530	25	600	25	100 KHz, 200mT	230
				480	60		60
							80
				420	100	270	100
				390	120		120
Epcos	?	2400	25< f<500	530	25	600	25	100 KHz, 200mT	230
				480	60		60
							80
				420	100	270	100
				390	120		120
TDK	PC90	2400	25< f<500	540	25	680	25	100 KHz, 200mT	230
				510	60	470	60
						380	80
				450	100	320	100
				420	120	400	120
Epcos	N92	1500	25< f<500	440	100	410	100	100 KHz, 200mT	280
TDK	PC95	3300	25< f<750	530	25	350	25	100 KHz, 200mT	215
				480	60	290	60
						280	80
				410	100	290	100
				380	120	350	120
Epcos	N95	3000	25< f<500	525	25	460	25	100 KHz, 200mT	220
						420	50
						390	80
				410	100	390	100
						420	120
Epcos Preliminary	N96	2900	25< f<500	490	25	325	25	100 KHz, 200mT	240
						330	50
						350	80
				390	100	410	100
						450	120
Epcos	N49	1500	300< f<1000	490	25	330	100	300KHz, 100mT	240
				400	100	80	100	500KHz, 50mT