FT23-67

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MATERIAL 67 (Permeabilität 40)


Ein Nickel-Zink-Material mit geringer Permeabilität und großem Volumenwiderstand. Material hoher Güte für den Frequenzbereich zwischen 15 und 25 MHz. Wird als Ringkern sehr häufig für Spulen hoher Güte verwandt. Lieferbar in Stab-, Perlen- oder Ringform.

Sehr gut geeignet für HF-Anwendungen hoher Güte. Wird verbreitet für Breitbandverstärker und Linearendstufen eingesetzt.

Chart Legend
Σl/A  :  Core Constant,    le :  Effective Path Length,    Ae :  Effective Cross-Sectional Area,    Ve :  Effective Core Volume AL :  Inductance Factor  

67 Material Characteristics

Property

Item

Unit/Symbol

Value

 

 

 

(AL-nH/ N²)

Max.

Permeabilität

Freq. MHz Resonanz

Freq. MHz Breitband

Freq. MHz Drossel

Initial Permeability@ B < 10 gauss

 

µi

40

 

125

15-25

50-500

500-2000

Flux Density @ Field Strength

Gauss
Oersted

B

H

2500

20

Mittlere Feld-

Linienlänge

1.3 cm

Oberfläche

0.02²

Volumen

0.027³

Residual Flux Density

Gauss

Br

1000

 

 

 

Coercive Force

Oersted

Hc

2.5

Sättigungsflußdichte

10 Oe (Gauß)

1850

Vol.Widerstand Ω/cm

10⁸

Loss Factor @ Frequency

10 -6
MHz

Tan δ/ µi

200

50

Remanenzflußdichte

10 Oe (Gauß)

750

Σl/A(cm-1)

63.80

Temperature Coefficient of Initial Permeability (20 -70°C)

%/°C

 

0.05

 

Density gm/cm3

 

≈4.7 g/cm3

Curie Temperature

°C

Tc

>475

Resistivity

Ohm-cm

Ρ

1×107

1×105

Electrical Specifications

Bestellnr.

Kern-Material

Item

Unit/Symbol

Condition

Value

AL-Toleranz

 

FT23-67

Ferrit Toroid

AL

nH/N2

@ 10 KHz

6 Min

±25%

NiZn

Le

cm

N/A

1.3

±10%

Ae

cm2

N/A

0.02

±10%

Ve

cm3

N/A

0.027

±10%

Initial Permeability

µ0

@ B < 10 gauss

40

±20%

Temp. Coeff. Of initial

Permeability

% °C

20-70°C

0.05

Typ.

Coercive Force

Hc

oersted

3.5

Typ.

Residual Flux Density

Gauss, Br

N/A

800

Typ.

Flux Density

Gauss, B

Initial (B), oersted

2300

Typ.

 

Gauss, H @

@ Field Strength (H), oersted

20

Typ.

Curie temperature

°C

Tc

> 475

Nom.

Resistivity

Ω cm. p

@ Field Strength

1×107

Typ.

Loss Factor

106Tan δ/ µi

Initial

200

Typ.

 

MHz

@ Frequency

50

Typ.

Chart Legend

Σl/A  :

le :

Ae :

Ve :

AL :

 

Core Constant

Effective Path Length

Effective Cross-Sectional

Effective Core Volume

Inductance Factor  

 

 

63.80

1.3

0.02

0.027

6 min

Dimensional Tolerances

Case

In

Toleranz

mm

Toleranz

Weight

Gewicht

B (Outer Diameter)/mm

0.230

±0.010

5.95

±0.25

0.14 g

0.14 gramm

A (Inner Diameter)/mm

0.120

±0.004

3.05

±0.10

---

---

H (Height)/mm

0.060

±0.010

1.65

±0.25

---

--

Ferrite Material Constants

Specific Heat

0.25 cal/g/°C

Thermal Conductivity

3.5 - 4.5 mW/cm-°C

Coefficient of Linear Expansion

8 - 10x10-6/°C

Tensile Strength

4.9 kgf/mm2

Compressive Strength

42 kgf/mm2

Young's Modulus

15x103 kgf/mm2

Hardness (Knoop)

650

Specific Gravity

≈4.7 g/cm3

Die oben genannten Eigenschaften sind typisch für Amidon MnZn- und NiZn-Ferrite.

The above quoted properties are typical for Amidon MnZn and NiZn ferrites

 

Characteristic curves are measured on standard Toroids (18/10/6 mm)  at 25°C and 10 kHz unless otherwise indicated. Impedance characteristics are measured on standard shield beads (3.5/1.3/6.0 mm) unless otherwise indicated.

MATERlAL 67 ( µ= 40 ) Has greater saturation flux density and very good temperature stability. For high 'Q' inductors, ( 10 MHz to 80 Mhz ). Wideband transformers to 200 MHz. Toroids only