FERROXCUBE DATA SHEET TN23/14/7 Ferrite toroids Supersedes data of September 2004 2008 Sep 01 Ferroxcube Ferrite toroids TN23/14/7 RING CORES (TOROIDS) R i n g Effective core parameters SYMBOL PARAMETER VALUE UNIT Σ(I/A) core factor (C1) 1.81 mm−1 Ve effective volume 1722 mm3 Ie effective length 55.8 mm Ae effective area 30.9 mm2 m mass of core ≈ 8.4 g 23.7 ±0.7 handbook, halfpage c o r e ;;;; ;;;; 13.1 ±0.6 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). The colour is white. Maximum operating temperature is 160 °C. coating PA11 7.5 ±0.45 CBW307 Isolation voltage Dimensions in mm. DC isolation voltage: 2000 V. Contacts are applied on the edge of the ring core, which is also the critical point for the winding operation. Fig.1 TN23/14/7 ring core. AL (nH) µi 4C65 87 ± 25% ≈ 125 4A11 486 ± 25% GRADE ≈ 700 (1) TYPE NUMBER TN23/14/7-4C65 TN23/14/7-4A11 − ≈ 800 TN23/14/7-3R1 3F3 1250 ± 25% ≈ 1800 TN23/14/7-3F3 3C90 1600 ± 25% ≈ 2300 TN23/14/7-3C90 3C11 3000 ± 25% ≈ 4300 TN23/14/7-3C11 3E25 3820 ± 25% ≈ 5500 TN23/14/7-3E25 3R1(2) 1. 2. Old permeability specification maintained. 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. WARNING Do not use 3R1 cores close to their mechanical resonant frequency. For more information refer to “3R1” material specification in this data handbook. 2008 Sep 01 1679 d a t a Ferroxcube Ferrite toroids TN23/14/7 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 3C90 ≥320 ≤ 0.19 ≤ 0.19 3F3 ≥320 GRADE 2008 Sep 01 ≤ 0.19 1680 f = 400 kHz; ˆ = 50 mT; B T = 100 °C ≤ 0.33 Ferroxcube Ferrite toroids TN23/14/7 DATA SHEET STATUS DEFINITIONS DATA SHEET STATUS PRODUCT STATUS DEFINITIONS Preliminary specification Development This data sheet contains preliminary data. Ferroxcube reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. Product specification Production This data sheet contains final specifications. Ferroxcube reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. DISCLAIMER Life support applications These products are not designed for use in life support appliances, devices, or systems where malfunction of these products can reasonably be expected to result in personal injury. Ferroxcube customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Ferroxcube for any damages resulting from such application. PRODUCT STATUS DEFINITIONS STATUS INDICATION DEFINITION Prototype These are products that have been made as development samples for the purposes of technical evaluation only. The data for these types is provisional and is subject to change. Design-in These products are recommended for new designs. Preferred These products are recommended for use in current designs and are available via our sales channels. Support These products are not recommended for new designs and may not be available through all of our sales channels. Customers are advised to check for availability. 2008 Sep 01 1681