WHD20K01G Dual Ports DIP 10/100Base-TX PIN20 non-PoE LAN Transformer
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The hole pattern carries over completely; height and lead length differ — the WHD20K01G stands 8.00 mm ±0.50 mm with 3.00 mm leads, theWHD20601G7.20 mm Max with 3.20 mm leads.
Both bodies are 25.40 × 10.00 mm on 2.54 mm pitch with a 22.86 mm span and 7.62 mm row spacing, both hold four 1CT:1CT units split between two ports, and both put the common-mode choke on the cable side. The land pattern therefore transfers directly; what needs checking is the clearance above the part and how far the leads stand proud of the board.
In chassis where clearance sits near 8 mm, and where an air duct or an upper board passes directly above the transformer.
The WHD20K01G body is 8.00 mm ±0.50 mm, so its worst case is 8.5 mm. Parts on the same holes quoted as 7.20 mm Max stay at 7.2 mm. That is a 1.3 mm gap between worst cases, and working from nominal values understates it: one height is quoted with a tolerance and the other as a maximum, so a comparison has to use each part's own worst case. Lead length also shortens, which is worth a re-check of the wave-solder settings on thinner boards.
Hole pattern first, then height, then temperature grade.
Three hole patterns exist, and the Pitch field on the product pages cannot separate two of them, so row spacing and span have to come from the drawing: 2.54 mm / 7.62 mm / 22.86 mm, where the WHD20K01G sits; 2.00 mm / 7.62 mm / 18.00 mm; and 2.00 mm / 10.16 mm / 18.00 mm. Once the holes are fixed, parts on the same pattern still differ in height and in internal element order, neither of which appears in the spec table. Tell us the chassis clearance and the target PHY and VOOHU will help finalise the choice from the10/100 BASE-T range.
