MATERIAL 43 (Permeabilität 850)
Ein Nickel-Zink Material mit großem Volumenwiderstand. Wird häufig für Spulen mittlerer Frequenz in Ringform und für Breitbandüber¬trager bis 50 MHz benutzt. Wird als Ferritperle besonders zur Dämpfung unerwünschter Oberwellen im Bereich von 50 bis 200 MHz eingesetzt.
Features
NiZn ferrite material with a range for inductive applications up to 25 MHz, that can be used for EMI applications to suppress noise frequencies above 200 MHz.
Burnished to break sharp edges, can contain Parylene C coat at smaller diameters from the length of 9.5mm (0.375") or a uniform coating of thermo-set plastic at larger dimensions (if part numbers ends with a C).
Beschichtungsoptionen:
- Toroide mit einem Außendurchmesser von 9,5 mm (0,375 ") oder kleiner können mit Parylen C beschichtet werden. Die Parylene-Beschichtung erhöht die Abmessungen "A" und "C" und verringert die Abmessung "B" um maximal 0,038 mm (0,0015 "). Die neunte Ziffer einer Parylene-beschichteten Toroid-Teilenummer ist eine "1". Siehe Referenztabellen für die Materialeigenschaften von Parylene C. Parylene C-Beschichtung sind RoHS-konform.
- Thermoplastisch beschichtete, kunststoffbeschichtete Teile können einer Mindestdurchschlagsspannung von 1000 Vrms widerstehen, die gleichmäßig über die "C" -Abmessung des Toroids angelegt wird.
Coating Options:
– Toroids with an outside diameter of 9.5 mm (0.375″) or smaller can be supplied Parylene C coated. The Parylene coating will increase the “A” and “C” dimensions and decrease the “B” dimension a maximum of 0.038 mm (0.0015″). The ninth digit of a Parylene coated toroid part number is a “1”. See reference tables for the material characteristics of Parylene C. Parylene C coating is RoHS compliant.
Chart Legend
Σl/A : Core Constant, le : Effective Path Length, Ae : Effective Cross-Sectional Area, Ve : Effective Core Volume
AL : Inductance Factor
|
43 Material Characteristics |
|
Property |
Item |
Unit/Symbol |
|
Max.
Permeabilität |
Freq. MHz Resonanz |
Freq. MHz Breitband |
Freq. MHz Drossel |
|
Initial Permeability@ B < 10 gauss |
|
µi |
850 |
3000 |
0,01-1 |
1-50 |
30-600 |
|
Flux Density @ Field Strength |
Gauss
Oersted |
B
H |
2900
10 |
Mittlere Feld-
Linienlänge
7,3 cm |
Oberfläche
0,37 cm² |
Volumen
2,7 cm³ |
|
Residual Flux Density |
Gauss |
Br |
1300 |
|
|
|
|
Coercive Force |
Oersted |
|
0.45 |
Sättigungsflußdichte
10 Oe (Gauß)
2700 |
Vol.Widerstand Ω/cm
10⁵ |
|
Loss Factor @ Frequency |
10 -6
MHz |
Tan δ/ µi |
250
1.0 |
Remanenzflußdichte
10 Oe (Gauß)
1300 |
Σl/A(cm-1)
21.3 |
|
Temperature Coefficient of Initial Permeability
(20 -70°C) |
%/°C |
|
1.25 |
Density gm/cm3
≈4.7 g/cm3 |
|
Curie Temperature |
°C |
Tc |
>130 |
|
Resistivity |
Ohm-cm |
Ρ
10⁵ |
|
|
Electrical Specifications |
|
Bestellnr. |
Kern-Material |
Item |
Unit/Symbol |
Condition |
Value |
AL-Toleranz |
|
|
FT37-43 |
Ferrit Toroid |
AL |
nH/N2 |
@ 10 KHz |
470 |
±20% |
|
NiZn |
|
|
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 |
830 |
±20% |
|
Temp. Coeff. Of initial
Permeability |
% °C |
20-70°C |
1.25 |
Typ. |
|
Coercive Force |
Hc |
oersted |
0.45 |
Typ. |
|
Residual Flux Density |
Gauss, Br |
N/A |
1300 |
Typ. |
|
Flux Density |
Gauss, B |
Initial (B), oersted |
2900 |
Typ. |
|
|
Gauss, H @ |
@ Field Strength (H), oersted |
10 |
Typ. |
|
Curie temperature |
°C |
Tc |
> 130 |
Nom. |
|
Resistivity |
Ω cm. p |
@ Field Strength |
10⁵ |
Typ. |
|
Loss Factor |
106Tan δ/ µi |
Initial |
250 |
Typ. |
|
|
MHz |
@ Frequency |
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 |
470 |
|
Dimensional Tolerances |
|
Case |
In |
Toleranz |
mm |
Toleranz |
Weight |
Gewicht |
|
B (Outer Diameter)/mm |
0.375 |
±0.008 |
9.5 |
±0.20 |
0.83 g |
0.83 gramm |
|
A (Inner Diameter)/mm |
0.187 |
±0.006 |
4.75 |
±0.15 |
--- |
--- |
|
H (Height)/mm |
0.125 |
±0.010 |
3.3 |
-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. |
Toroids are tested for AL values at 10 kHz.
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.
This NiZn is our most popular ferrite for suppression of conducted EMI from 20 MHz to 250 MHz. This material is also used for inductive applications such as high frequency common-mode chokes. EMI suppression beads, beads on leads, SM beads, multi-aperture cores, round cable EMI suppression cores, round cable snap-its, flat cable EMI suppression cores, flat cable snap-its, miscellaneous suppression cores, bobbins, and toroids are all available in 43 material.
43 Material is used for EMI/RFI suppression in the 20 MHz to 250 MHz range.