18 SAMWHA ELECTRONICS Material Characteristics High Permeability Material Material SM-70S Initial permeability μiac 7500 ±25% Relative loss factor -6 tanδ/μiac ×10 f:100kHz < 15 Saturation flux density (1194A/m) Bs mT 25℃ 430 Remanence Br mT 25℃ 50 Coercivity Hc A/m 25℃ 4 -6 Relative temp. factor αμr ×10 /℃ 20~60℃ -0.1~1.0 Hysterisis material constant hB ×10-6/mT 10kHz, 25℃ < 0.8 Curie temperature Tc ℃ Density d kg/m Resistivity ρ > 130 4.90×103 3 25℃ Ω·m > 0.5 Note : 1) Typical values 2) The values were obtained with toroidal cores(30X8-20H) at room temperature unless indicated otherwise Complex permeability vs. Frequency Permeability vs. Temperature 10000 7000 8000 6000 7000 5000 15000 6000 4000 μ" 3000 5000 4000 3000 2000 2000 1000 1000 100 101 102 103 Initial permeability, μ iac Complex permeability, μ',μ" 9000 0 20000 10000 0 104 5000 0 -40 -20 0 20 60 80 100 120 140 Bm vs. Hm tan δ/μ i vs. Frequency 10 -1 450 25℃ 400 10 -2 350 10-3 Bm(mT) Relative loss factor, tan δ/μ i 40 Temperature (℃) Frequency (kHz) 10-4 10-5 250 100℃ 200 150 100 10-6 10 300 50 0 -7 101 102 Frequency (kHz) 103 0 200 400 600 Hm(A/m) 800 1000 1200