FT140-85
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MATERIAL 85 (Permeabilität 5000) Ein Mangan-Zink-Material, mit geringem Volumenwiderstand und niedrigen Kernverlusten zwischen 1 kHz und 1 MHz. Wird für Transformatoren niedriger Leistung, Breitbandübertrager und Puls-Transformatoren benutzt. Sehr geeignet auch zur Dämpfung unerwünschter HF im Bereich von 5 bis 20 MHz. Lieferbar in Ringform. 85-Material ist ein mittelfristiges Allzweckmaterial. Gut geeignet sowohl für EMI / RFI-Filterung als auch für Breitbandtransformatoren. A manganese-zinc material with low volume resistivity and low core loss between 1 kHz and 1 MHz. Used for low power transformers, broadband transformers and pulse transformers. Also very suitable for attenuating unwanted HF in the range of 5 to 20 MHz. Available in ring form 85 material is a medium perm general-purpose material. Well suited both for EMI/RFI filtering and broadband transformers.

85 Material Characteristics Property Unit Symbol Value Max. Permeabilität Freq. MHz Resonanz Freq. MHz Breitband Freq. MHz Drossel Initial Permeability@ B < 10 gauss µi 5000 ±20% 9500 ±20% 0,001-1 0.15-12 1-20 Flux Density @ Field Strength Gauss Oersted B H 4300 430 Mittlere Feld- Linienlänge Ober- fläche Volumen Residual Flux Density Gauss Br 1800 8.9 cm 0,79 cm² 7 cm³ Saturation Flux Density (4,300 G at 15 Oe, 25°C) Maximum Usable Frequency (50% roll-off) Relative Loss Factor (tan δ/µiac) X10-6, 25°C Remanence (1,000 G, 25°C) Resistivity ±15(100 kHz) (100 mT) 0.5 Ω-m 430 mT, 11.9 A•T/cm ≤0.7 MHz Coercive Force Oersted Oe, A/m Hc 0,16 Sättigungsflußdichte 10 Oe (Gauß) 4300 Vol.Widerstand Ω/cm 5x102 Loss Factor @ Frequency 10-6 MHz Tan δ/ µi 15 0.1 Remanenzflußdichte 10 Oe (Gauß) 1250 Σl/A(cm-1) 11.2 Temperature Coefficient of Initial Permeability (20 -70°C) %/°C 0.6 Density gm/cm3 ≈4.8 g/cm3 Curie Temperature °C Tc >140 Resistivity Ohm-cm Ρ 300 Disaccommodation Factor 10-6 ˂3 Max. Usable freq ˂ 1 50% roll-of Relative Loss Factor, (tan δ/µiac) X10-6 25°C ≤15 (100 KHz) Electrical Specifications Bestellnr. Kern-Material Item Unit/Symbol Condition Value AL-Toleranz FT140-85 Ferrit Toroid AL nH/N2 @ 10 KHz 3170 ±20% MnZn Le cm N/A 7.32 ±10% Ae cm² N/A 0.358 ±10% Ve cm³ N/A 2.62 ±10% Initial Permeability µ⁰ @ B < 10 gauss 5000 ±25% Temp. Coeff. Of initial Permeability % °C 20-70°C 0.90 Typ. Coercive Force Hc oersted N/A Typ. Residual Flux Density Gauss, Br N/A 1800 Typ. Flux Density Gauss, B Initial (B), oersted 4300 Typ. Gauss, H @ @ Field Strength (H), oersted 430 Typ. Curie temperature °C Tc > 140 Nom. Resistivity Ω cm. p @ Field Strength 0.5 Ω-m Typ. Loss Factor 106 Tan δ/ µi Initial ˂20 Typ. MHz @ Frequency 100 Typ. Remanence (1,000 G, 25°C) G, mT Typical ˂3 (100 mT) 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 5500 Dimensional Tolerances Case In Toleranz mm Toleranz Weight Gewicht B (Outer Diameter)/mm 1.4 ---- 35.55 ±0.75 --- --- A (Inner Diameter)/mm 0.9 ----- 23 ±0.90 --- --- 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.