The difference is sealing resin.
HIF3CA-"xx"PA-2.54DSA(63) : Without sealing resin, our standard product
HIF3CA-"xx"PA-2.54DSA(91) : Sealing resin is applied between insulator...
The mate is HIF3BA-34D-2.54R (63) equipped with HIF3-MULTI CLAMP (34) (discontinued),or it is HIF3BA-34D-2.54R (63) equipped with HIF3-34CL (discontinued).
The holes are for the fixing screws, that go though from PCB rear side.
If fixing screws are required, HIF3B*-**P-2.54W(88) is recommended.
It is nut built-in type that can be...
The difference is the dimensions of the part to be locked.
As the difference is only 0.3mm, they are interchangeable.However, 60 contact are not compatible.
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