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, le : Effective Path Length, Ae : Effective Cross-Sectional Area, Ve : Effective Core Volume, AL : 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 8.9 cm Oberfläche 0,79 cm² Volumen 7 cm³ Residual Flux Density Gauss Br 1800 Coercive Force Oersted Hc 0.25 Vol.Widerstand Ω/cm N/A Loss Factor @ Frequency 10 -6 MHz Tan δ/ µi 15 0.1 Remanenzflußdichte 10 Oe (Gauß) Σl/A(cm-1) 10.7 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 FT140-77 Ferrit Toroid AL nH/N2 @ 10 KHz 2400 ±25% MnZn Le cm N/A 8.9 ±10% Ae cm² N/A 0.79 ±10% Vef cm³ N/A 7 ±10% Initial Permeability µ⁰ @ B < 10 gauss 2000 ±20% Temp. Coeff. Of initial Permeability % °C 20-70°C 1.2 Typ. Coercive Force Hc oersted 0.25 Typ. Residual Flux Density Gauss, Br N/A 1800 Typ. Flux Density Gauss, B Initial (B), oersted 5100 Typ. Gauss, H @ @ Field Strength (H), oersted 5 Typ. Curie temperature °C Tc > 200 Nom. Resistivity Ω cm. p @ Field Strength N/A 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 11.2 8.9 0.79 7 2400 Dimensional Tolerances Case In Toleranz mm Toleranz Weight Gewicht B (Outer Diameter)/mm 1.4 ---- 35.55 ±0.75 26.00g 26.00 gramm A (Inner Diameter)/mm 0.9 ----- 23 ±0.55 --- --- H (Height)/mm 0.5 ---- 12.7 ±0.50 --- -- 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.
