B65525J0000Y038 Datasheet B65525J0063A045, B65525J0100A087, B65525J0250B045 | P7-P9

7 5/17

Please read Cautions and warnings and

Important notes at the end of this document.

Symbol Meaning Unit

A

e

A

L

A

L1

A

min

A

N

A

R

B

ΔB

B

ˆ

ΔB

ˆ

B

DC

B

R

B

S

C

0

CDF

DF

d

E

a

f

cutoff

f

max

f

min

f

r

f

Cu

g

H

ˆ

H

DC

H

c

h

h/μ

i

2

I

DC

I

ˆ

J

k

3

k

3c

L

Cross section of coil

Effective magnetic cross section

Inductance factor; A

L

= L/N

2

Minimum inductance at defined high saturation ( μ

a

)

Minimum core cross section

Winding cross section

Resistance factor; A

R

= R

Cu

/N

2

RMS value of magnetic flux density

Flux density deviation

Peak value of magnetic flux density

Peak value of flux density deviation

DC magnetic flux density

Remanent flux density

Saturation magnetization

Winding capacitance

Core distortion factor

Relative disaccommodation coefficient DF = d/μ

i

Disaccommodation coefficient

Activation energy

Frequency

Cut-off frequency

Upper frequency limit

Lower frequency limit

Resonance frequency

Copper filling factor

Air gap

RMS value of magnetic field strength

Peak value of magnetic field strength

DC field strength

Coercive field strength

Hysteresis coefficient of material

Relative hysteresis coefficient

RMS value of current

Direct current

Peak value of current

Polarization

Boltzmann constant

Third harmonic distortion

Circuit third harmonic distortion

Inductance

mm

2

mm

2

nH

mm

2

mm

2

μΩ = 10

–6

Ω

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

Vs/m

2

, mT

F = As/V

mm

–4.5

J

s

–1

, Hz

s

–1

, Hz

s

–1

, Hz

s

–1

, Hz

s

–1

, Hz

mm

A/m

10

–6

cm/A

10

–6

cm/A

A

Vs/m

2

J/K

H = Vs/A

Symbols and terms

Ferrites and accessories

Symbols and terms

8 5/17

Please read Cautions and warnings and

Important notes at the end of this document.

Symbol Meaning Unit

ΔL/L

L

0

L

H

L

p

L

rev

L

s

l

e

l

N

P

Cu

P

trans

P

V

PF

Q

R

Cu

R

h

ΔR

h

R

i

R

p

R

s

R

th

R

V

s

T

ΔT

T

C

t

v

tan δ

L

tan δ

r

tan δ

e

tan δ

h

tan δ/μ

i

U

Û

V

e

Z

n

Relative inductance change

Inductance of coil without core

Main inductance

Parallel inductance

Reversible inductance

Series inductance

Effective magnetic path length

Average length of turn

Number of turns

Copper (winding) losses

Transferrable power

Relative core losses

Performance factor

Quality factor (Q = ωL/R

s

= 1/tan δ

L

)

Resistance

Copper (winding) resistance (f = 0)

Hysteresis loss resistance of a core

R

h

change

Internal resistance

Parallel loss resistance of a core

Series loss resistance of a core

Thermal resistance

Effective loss resistance of a core

Total air gap

Temperature

Temperature difference

Curie temperature

Time

Pulse duty factor

Loss factor

Loss factor of coil

(Residual) loss factor at H → 0

Relative loss factor

Hysteresis loss factor

Relative loss factor of material at H → 0

RMS value of voltage

Peak value of voltage

Effective magnetic volume

Complex impedance

Normalized impedance |Z|

n

= |Z| /N

2

×

ε

(l

e

/A

e

)

H

mm

W

mW/g

Ω

K/W

Ω

mm

°C

K

°C

s

V

mm

3

Ω

Ω/mm

Symbols and terms

Ferrites and accessories

9 5/17

Please read Cautions and warnings and

Important notes at the end of this document.

All dimensions are given in mm.

Surface-mount device

Symbol Meaning Unit

α

F

α

e

ε

r

Φ

η

B

η

i

λ

s

μ

0

μ

a

μ

app

μ

e

μ

i

μ

p

'

μ

p

"

μ

r

μ

rev

μ

s

'

μ

s

"

μ

tot

ρ

Σl/A

τ

Cu

ω

Temperature coefficient (TK)

Relative temperature coefficient of material

Temperature coefficient of effective permeability

Relative permittivity

Magnetic flux

Efficiency of a transformer

Hysteresis material constant

Hysteresis core constant

Magnetostriction at saturation magnetization

Relative complex permeability

Magnetic field constant

Relative amplitude permeability

Relative apparent permeability

Relative effective permeability

Relative initial permeability

Relative real (inductive) component of μ

(for parallel components)

Relative imaginary (loss) component of μ

(for parallel components)

Relative permeability

Relative reversible permeability

Relative real (inductive) component of μ

(for series components)

Relative imaginary (loss) component of μ

(for series components)

Relative total permeability

derived from the static magnetization curve

Resistivity

Magnetic form factor

DC time constant τ

Cu

= L/R

Cu

= A

L

/A

R

Angular frequency; ω = 2 Πf

1/K

Vs

mT

-1

A

–1

H

–1/2

Vs/Am

Ωm

–1

mm

–1

s

–1

Symbols and terms

Ferrites and accessories

B65525J0000Y038

B65525J0000Y038

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