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All three share one land pattern and each upgrades a single axis: the WHS16013LF is the base part; theWHS16037TGadds wide temperature at -40 °C to +85 °C; the WHS16037-2KG adds isolation at 2500 VAC.
None of the three carries both. TheWHSH16037D0does: -40 °C to +85 °C with 2500 VAC isolation. Its body is the same 12.80 × 6.90 mm. Where both are required, start there, and send us the board’s footprint drawing so we can confirm the existing land pattern still applies. Body, height, pitch, span and coplanarity match value for value across the three, so a footprint-based search will group them together — but they are not equivalent substitutes.
Two 1CT:1CT units, forming the two channels — one pairset — of a single 100M port.
A 100M link uses only two differential pairs, one transmitting and one receiving, so two units suffice. The WHS16013LF is a single-port part, one device per RJ45. The count also works in reverse as a rate check: asingle-port Gigabit deviceholds four units, twice as many.
A 12.80 × 6.90 mm body, 9.30 mm across the leads, 5.65 mm ±0.50 mm high; 1.27 mm pitch, 8.89 mm span, coplanarity held to 0.10 mm across 16 terminations.
The foot is 0.70 mm with a 0° to 8° lead angle. The WHS16013LF is surface-mount and reflow-assembled, supplied on ø330 mm tape and reel at 600 pieces per reel, three reels to an inner carton and two inner cartons to an export carton.Low-profile partsstanding 2.50 mm exist in the same family and are worth comparing where clearance is tight.