2

09/06

Please read Cautions and warnings and

Important notes at the end of this document.

Material properties

Preferred application

Power transformers

Material

N49

Base material

MnZn

Symbol

Unit

Initial permeability

(T = 25 °C)

μ

i

1500

±25%

Flux density

(H = 1200 A/m, f = 10 kHz)

mT

mT

490

400

Coercive field strength

(f = 10 kHz)

A/m

A/m

38

33

Optimum

frequency range

kHz

300 …

1000

Hysteresis

material constant

η

B

Curie temperature

°C

>240

Mean value of

α

F

at 25 … 55 °C

—

Density (typical values)

4750

Relative core losses

(typical values)

25 kHz, 200 mT, 100 °C

—

100 kHz, 200 mT, 100 °C

—

300 kHz, 100 mT, 100 °C

330

500 kHz, 50 mT, 100 °C

80

1 MHz, 50 mT, 100 °C

475

Resistivity

ρΩm17

Core shapes

RM, EFD, ELP, Toroid,

EQ, ER

N49

SIFERRIT materials