Electronic – Reflow soldering, pin longer than pad

footprintipcreflow

I was designing the footprint for this FPC connector: Datasheet

The recommended land pattern is shown here:

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The issue I encountered is that the pins on one side protrude outside of the pad:

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I triple checked the dimensions and the outer "toes" and the "heel" on one of the sides seem fine.

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Would the absence of the "heel" fillet on one of the sides be an issue? It's not that I think that Molex has provided a bad footprint but more that I fear I might have misinterpreted something.

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Source: IPC-A-610D

Update

These are the measurements on the land pattern depicted above:

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I moved the pads to be 2.9mm center to center, and this is the result:

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Which is weird, because the long pad is still on the short "pin". Flipping the part to match the long pin with the long pad, this is how it looks:

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Best Answer

Probably not a big deal, since that portion of the pin looks to actually be rounded and not square, which is hard to see in the picture below:

enter image description here Source: https://uk.rs-online.com/web/p/fpc-connectors/7883521/

The dimensions in the datasheet don't show the rounded inside of the connectors which would make it easier to solder and align itself on the pads. I don't know that I'd even worry about if the quantities of the board were low (like 100 or less).

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