silicon protection arrays ?2009 littelfuse, inc 12 application guide 10/100/1000 ethernet (esd only) considerations: some ethernet ports only need be protected for esd and not for lightning induced transients these are sometimes referred to as ?2m? ports or 2 meter ports parasitic capacitance should be taken into account especially for gigabit ethernet the 4 data lines below ( tx+/- and rx+/- ) are being protected against esd by a low capacitance sp3002 which is suitable for all ethernet data rates in fact, any low capacitance sp30xx device is suitable for any ?esd only? ethernet application application schematic: recommended spa devices: ordering number esd level (contact) lightning (t p =8/20 s) i/o capacitance # of channels v rwm packaging SP3002-04JTG 12kv 4.5a 0.85pf 4 6v sc70-6 sp3003-04xtg 8kv 2.5a 0.65pf 4 6v sot563 sp3004-04xtg 12kv 4a 0.85pf 4 6v sot563 ethernet phy outside world case gnd tx- rx+ rx- j1 j8 tx+ rj-45 co nn ector case gnd sp3002 nc
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