FT82-77

 

Material 77 Permeabilität 2000

Ein Mangan-Zink-Material mit großer Sättigungsflußdichte bei hohen Temperaturen. Niedrige Kernverluste im Bereich von 1 kHz bis 1 MHz. Ideal für Transformatoren und Breitbandübertrager bis 30 MHz sowie zur Nebenwellendämpfung zwischen 2 und 40 MHz. Lieferbar in Ringkerne.

   Chart Legend
   Σl/A  :  Core Constant,    l_e :  Effective Path Length,    A_e :  Effective Cross-Sectional Area,    V_e :  Effective  Core Volume, A_L :  Inductance Factor  

 

77 Material Characteristics

Property

Unit

Symbol

Value

Max. Permeabilität

Freq. MHz Resonanz

Freq. MHz Breitband

Freq. MHz Drossel

Initial Permeability@ B < 10 gauss

µi

2000

6000

0.001-2

0.5-30

200-1000

Flux Density @ Field Strength

Gauss Oersted

B H

5100 5

Mittlere Feld- Linienlänge 5.2 cm

Oberfläche 0,243 cm²

Volumen 1.26 cm³

Residual Flux Density

Gauss

Br

1800

Coercive Force

Oersted

Hc

0.25

4600

Vol.Widerstand Ω/cm 10ᴯ

Loss Factor @ Frequency

10 -6 MHz

Tan δ/ µi

15 0.1

Remanenzflußdichte 10 Oe (Gauß) 1150

Σl/A(cm-1) 21.3

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

%/°C

1.2

Density gm/cm3   ≈4.7 g/cm3

Curie Temperature

°C

Tc

>200

Resistivity

Ohm-cm

Ρ

100

Electrical Specifications

Bestellnr.

Kern-Material

Item

Unit/Symbol

Condition

Value

AL-Toleranz

FT82-77

Ferrit Toroid

AL

nH/N2

@ 10 KHz

1270

±25%

MnZn

Le

cm

N/A

5.2

±10%

Ae

cm2

N/A

0.243

±10%

Vef

cm3

N/A

1.26

±10%

Initial Permeability

µ0

@ B < 10 gauss

2000

±20%

Temp. Coeff. Of initial Permeability

% °C

20-70°C

0.7

Typ.

Coercive Force

Hc

oersted

1.8

Typ.

Residual Flux Density

Gauss, Br

N/A

1800

Typ.

Flux Density

Gauss, B

Initial (B), oersted

4900

Typ.

Gauss, H @

@ Field Strength (H), oersted

5

Typ.

Curie temperature

°C

Tc

> 200

Nom.

Resistivity

Ω cm. p

@ Field Strength

10²

Typ.

Loss Factor

106Tan δ/ µi

Initial

15

Typ.

MHz

@ Frequency

0.1

Typ.

Chart Legend

Σl/A  :

le :

Ae :

Ve :

AL :

Core Constant

Effective Path Length

Effective Cross-Sectional

Effective Core Volume

Inductance Factor

21.3

5.2

0.243

1.26

1270

Dimensional Tolerances

Case

In

Toleranz

mm

Toleranz

Weight

Gewicht

B (Outer Diameter)/mm

0.825

±0.014

21

±0.35

6.40g

6.40 gramm

A (Inner Diameter)/mm

0.520

±0.012

13.20

±0.30

---

---

H (Height)/mm

0.250

±0.010

6.35

±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.