Philips Components Product specification Ferrite ring cores (toroids) TN14/9/5 RING CORES (TOROIDS) Effective core parameters SYMBOL PARAMETER VALUE UNIT Σ(I/A) core factor (C1) 2.84 mm−1 Ve effective volume 430 mm3 Ie effective length 35 mm Ae effective area 12.3 mm2 m mass of core ≈2.1 g 14.6 ±0.4 handbook, halfpage ,, ,, ,,,, 8.2 ±0.35 Coating (≈0.3) The cores are coated with polyamide 11 (PA11), flame retardant in accordance with “UL 94V-2” ; UL file number E 45228 (M). coating PA11 5.5 ±0.3 Isolation voltage CBW312 DC isolation voltage: 1500 V. Contacts are applied on the edge of the ring core, which is also the critical point for the winding operation. Dimensions in mm. Fig.1 TN14/9/5 ring core. Ring core data GRADE AL (nH) µi COLOUR CODE TYPE NUMBER 4C65 55 ±25% ≈125 violet TN14/9/5-4C65 4A11 310 ±25% ≈700 pink TN14/9/5-4A11 ≈800 3R1(1) − black TN14/9/5-3R1 790 ±25% ≈1800 blue TN14/9/5-3F3 3C90 1015 ±25% ≈2300 ultramarine TN14/9/5-3C90 3C11 1900 ±25% ≈4300 white TN14/9/5-3C11 3E25 2430 ±30% ≈5500 orange TN14/9/5-3E25 3E5(2) 3760 ±30% ≈8500 yellow/white TL14/9/5-3E5 3E6(2) 4415 ±30% ≈10000 purple/white TL14/9/5-3E6 3F3 Notes 1. Due to the rectangular BH-loop of 3R1, inductance values strongly depend on the magnetic state of the ring core and measuring conditions. Therefore no AL value is specified. For the application in magnetic amplifiers AL is not a critical parameter. 2. Ring cores in 3E5 and 3E6 are lacquered (polyurethane) and have different dimensions: Outside diameter = 14.25 ±0.4 mm; inside diameter = 8.75 ±0.35 mm; height = 5.25 ±0.3 mm; flame retardant in accordance with “UL 94V-2” ; UL file number E 192048. WARNING Do not use 3R1 cores close to their mechanical resonant frequency. For more information refer to “3R1” material specification in this data handbook. 1999 Dec 23 1 Philips Components Product specification Ferrite ring cores (toroids) TN14/9/5 Properties of cores under power conditions B (mT) at CORE LOSS (W) at H = 250 A/m; f = 25 kHz; T = 100 °C f = 25 kHz; ˆ = 200 mT; B T = 100 °C f = 100 kHz; ˆ = 100 mT; B T = 100 °C f = 400 kHz; ˆ = 50 mT; B T = 100 °C 3C90 ≥320 ≤0.048 ≤0.048 − 3F3 ≥320 − ≤0.05 ≤0.08 GRADE 1999 Dec 23 2