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| MODEM MAGNETICS V.90 Modem Transformer TM00409 * Provides isolation and balance while minimizing signal distortion and insertion loss in high speed modem applications Designed to match a 600 line to a 360 load * Designed to provide supplementary insulation at a working voltage of 250V Approved by UL, CSA and BABT Minimum interwinding breakdown voltage of 1500 Vrms * * * * Qualified per Bellcore TR-TSY-000357-1 ELECTRICAL SPECIFICATIONS at 25 C Insertion Loss dB @ 1 kHz Return Loss dB Frequency Response dB 100 Hz - 4 kHz Pri DCR max Sec Harmonic Distortion dB -3dBm, 150 Hz Longitudinal Balance dB 200 Hz - 3500 Hz Part Number Turns Ratio 2% 200 Hz - 3500 Hz 2811B 1:1 < 2.1 > 20 < 0.1 135 135 < -75 > 60 SCHEMATIC 2811B 1 6 3 Primary 4 Secondary TYPICAL SPICE TRANSMISSION MODEL 6.2 mH 120 1 35 pF 3 120 6 120k 40 H 35 pF 4 (c)2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00 Bel Fuse Inc. 198 Van Vorst Street, Jersey City, NJ 07302 * Tel 201-432-0463 * Fax 201-432-9542 * www.belfuse.com T4-19 MODEM MAGNETICS TM00409 V.90 Modem Transformer MECHANICAL 2811B 0.565 [14.35] 0.118 [3.00] 0.020 [0.508] Sq. wire 0.300 [7.62] 1 0.500 [12.70] 6 3 0.710 [18.03] max sq. 4 Note: Unless otherwise specified, dimensions are nominal and in inches [millimeters]. (c)2000 Bel Fuse Inc. Specifications subject to change without notice. 05.00 CORPORATE Bel Fuse Inc. 198 Van Vorst Street Jersey City, NJ 07302 Tel 201-432-0463 Fax 201-432-9542 www.belfuse.com FAR EAST Bel Fuse Ltd. 8F / 8 Luk Hop Street San Po Kong Kowloon, Hong Kong Tel 852-2328-5515 Fax 852-2352-3706 www.belfuse.com EUROPE Bel Fuse Europe Ltd. Preston Technology Management Centre Marsh Lane, Suite G7, Preston Lancashire, PR1 8UD, U.K. Tel 44-1772-556601 Fax 44-1772-888366 www.belfuse.com T4-20 |
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