S553-5999-F2 BEL | Alldatasheet

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Bel Fuse Inc. 206 Van Vorst Street, Jersey City, NJ 07302 • Tel 201-432-0463  Fax 201-432-9542  www.belfuse.com 10BASE-T LAN MAGNETICS ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 LM05510 page 1 Dual Isolation Transformer ELECTRICAL SPECIFICATIONS AT 25° C SCHEMATIC S553-5999-F2  Transformer turns ratio RX 1CT : 1CT and TX 1CT : 2CT  Utilizes standard surface mount packaging  Meets all IEEE 802.3 performance requirements  Low profile, surface mount packaging rated to 225° C peak IR reflow temperature  Operating temperature -40° to +85° C  Minimum interwinding breakdown voltage of 1500 Vrms 8 9 161CT : 1CT 1CT : 2CT TX RX rebmuNtraP LCO nimHµ egakaeL ecnatcudnI xamHµ gnidniwretnI ecnaticapaC xamfp RCD ΩΩΩΩΩ xam XR XT XR XT 61-1 11-6 NIXT OXT NIXR OXR S553-5999-F3 1CT : 1CT 1CT : 2CT TX RX

Bel Fuse Inc.

206 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 10BASE-T LAN MAGNETICS ©2005 Bel Fuse Inc. Specifications subject to change without notice. 03.05 LM05510 page 2 Dual Isolation Transformer MECHANICAL S553-5999-F2 S553-5999-F3 0.500 [12.70] max 0.375 [9.53] max 0.285 [7.24] max 0.018 ±0.002 [0.46 ±0.05] 0.225 [5.72] max 0.050 [1.27] 0.015 [0.38] 0.350 ±0.010 [8.89 ±0.25] 0.008 - 0.012 [0.20 - 0.30] 0.035 [0.89] 4˚ nom 0.025 [0.64] 0.070 [1.78] 0.050 [1.27] 0.425 [10.80] Suggested PCB Pad Layout Dimensions are in inches [millimeters]. Standard dimension tolerance is ±0.005 [0.13] unless otherwise noted. 0.004 [0.10]