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I'm looking into terminating a custom-length power supply extension cable to make everything look nice / fit in an awkward case. While researching parts I noticed that the EPS12V v2.0 specification states that Molex 44476-1111 or equivalent contacts be used but it also says that the Baseboard Power Connector should use the Molex 39-01-2240 housing. The housing is from the 5557 Mini-Fit Jr series and it specifies that 5556-series terminals be used rather than the 44476-series that EPS12V states.

Are the 5556-series terminals roughly compatible with the 44476-series? If not, should I use 44476 since that's what is in the spec?

The dimensions of the two are similar but not exact (data sheets for the 5556-series and 44476-series). I noticed that the 5556 is tin-coated-brass whereas the 44476 are tin-coated-copper-alloy. Maybe that's the big difference?

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    \$\begingroup\$ Brass is a copper alloy too. \$\endgroup\$ Oct 1, 2017 at 23:16
  • \$\begingroup\$ I would use the contacts that Molex recommends for the specified housing. \$\endgroup\$ Oct 2, 2017 at 4:21

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