9

Ferrites and accessories

Symbols and terms

10/24

Note:

All dimensions are given in mm.

Surface-mount device



Temperature coefficient (TK)

1/K

F

Relative temperature coefficient of material

1/K

e

Temperature coefficient of effective permeability

1/K

r

Relative permittivity



Magnetic flux

Vs



Efficiency of a transformer

B

Hysteresis material constant

mT-1

i

Hysteresis core constant

A–1H–1/2

s

Magnetostriction at saturation magnetization



Relative complex permeability

0

Magnetic field constant

Vs/Am

a

Relative amplitude permeability

app

Relative apparent permeability

e

Relative effective permeability

i

Relative initial permeability

p'

Relative real (inductive) component of



(for parallel components)

p"

Relative imaginary (loss) component of

 (for parallel components)

r

Relative permeability

rev

Relative reversible permeability

s'

Relative real (inductive) component of



(for series components)

s"

Relative imaginary (loss) component of

 (for series components)

tot

Relative total permeability derived from the static magnetization curve



Resistivity

m–1

l/A

Magnetic form factor

mm–1

Cu

DC time constant

Cu = L/RCu = AL/AR

s



Angular frequency;

= 2 f

s–1

Symbol

Meaning

Unit