1999 dec 23 1 philips components product speci?cation ferrite ring cores (toroids) tn14/9/5 ring cores (toroids) effective core parameters coating the cores are coated with polyamide 11 (pa11), flame retardant in accordance with ul 94v-2 ; ul file number e 45228 (m). isolation voltage 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. symbol parameter value unit s (i/a) core factor (c1) 2.84 mm - 1 v e effective volume 430 mm 3 i e effective length 35 mm a e effective area 12.3 mm 2 m mass of core ? 2.1 g fig.1 tn14/9/5 ring core. dimensions in mm. handbook, halfpage cbw312 8.2 0.35 5.5 0.3 coating pa11 ( ? 0.3) 14.6 0.4 ring core data 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 a l value is specified. for the application in magnetic amplifiers a l 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. grade a l (nh) m i colour code type number 4c65 55 25% ? 125 violet tn14/9/5-4c65 4a11 310 25% ? 700 pink tn14/9/5-4a11 3r1 (1) -? 800 black tn14/9/5-3r1 3f3 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 warning do not use 3r1 cores close to their mechanical resonant frequency. for more information refer to 3r1 material speci?cation in this data handbook.
1999 dec 23 2 philips components product speci?cation ferrite ring cores (toroids) tn14/9/5 properties of cores under power conditions grade b (mt) at core loss (w) at h = 250 a/m; f = 25 khz; t = 100 c f = 25 khz; = 200 mt; t = 100 c f = 100 khz; = 100 mt; t = 100 c f = 400 khz; =50mt; t = 100 c 3c90 3 320 0.048 0.048 - 3f3 3 320 - 0.05 0.08 b ? b ? b ?
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