B65687 Datasheet, PDF (8/9 Pages) TDK Electronics – Ferrites and accessories

Ferrites and accessories
Symbols and terms
Symbol
D
D_F
D_e
H_r
)
K
K_B
K_i
O_s
P
P_0
P_a
P_app
P_e
P_i
P_p'
P_p"
P_r
P_rev
P_s'
P_s"
P_tot

U
6l/A
W_Cu
Z
Meaning
Unit
Temperature coefficient (TK)
1/K
Relative temperature coefficient of material
1/K
Temperature coefficient of effective permeability
1/K
Relative permittivity

Magnetic flux
Vs
Efficiency of a transformer

Hysteresis material constant
mT^-1
Hysteresis core constant
A^–1H^–1/2
Magnetostriction at saturation magnetization

Relative complex permeability

Magnetic field constant
Vs/Am
Relative amplitude permeability

Relative apparent permeability

Relative effective permeability

Relative initial permeability

Relative real (inductive) component of P (for parallel components) 
Relative imaginary (loss) component of P (for parallel components) 
Relative permeability

Relative reversible permeability

Relative real (inductive) component of P (for series components) 
Relative imaginary (loss) component of P (for series components) 
Relative total permeability

derived from the static magnetization curve

Resistivity
:m^–1
Magnetic form factor
mm^–1
DC time constant W_Cu = L/R_Cu = A_L/A_R
s
Angular frequency; Z= 2 3f
s^–1
All dimensions are given in mm.
Surface-mount device
Please read Cautions and warnings and
Important notes at the end of this document.
8 03/16