Faston Ampacity

[Charybdis]

Hi there, I'm running on a project to update my car lights.
I'm planning to run 17 Amp through a 2,5 sq mm (13 AWG) PVC insulated and I'm looking for the proper connectors.
I've take a look on TE catalogues as well our italian leaders manufacturers such as Cembre and MTA.
So the question is this: how many Amp can a blue 6,35mm faston (.250 series) safely handle ?
Thank you so much

[wraper]

Look into datasheet for particular connector. They use different materials and are rated for different current.

[Charybdis]

The problem is that usually that is NOT a parameter listed 

[floobydust]

VDE limits 1/4" Faston to 20A and I have seen up to 40A in automotive parts but I find 25A is reasonable. At 30A up things are pretty hot. It should be fine for headlights or fog lights at 20A.

Every connection has resistance and will make heat, the datasheet spec is missing because it depends on how much heat you can get rid of. If the connector is under the hood near the engine, at a relay pin, or is wrapped in insulation (tape, wire loom etc.) it will get hotter and the wire melts.

Cheap chinese crimp connectors have very thin metal, so be careful to not use them for high currents.

13AWG is pretty stiff to use and it can tug and bend the Faston, with vibration. Blue is 14-16 ga. I would try the yellow ones.
Fastons are terrible to make waterproof, so I use Deutsch or Delphi/Packard connectors.

[wraper]

The problem is that usually that is NOT a parameter listed 

For example TE lists rated current for every variant. It depends on connector material and intended wire gauge of particular connector. 17A with 2,5mm² is just about what you can get with good quality connector. If there is no data with rated current, it's not a connector you should buy.

[Charybdis]

For example TE lists rated current for every variant. It depends on connector material and intended wire gauge of particular connector. 17A with 2,5mm² is just about what you can get with good quality connector. If there is no data with rated current, it's not a connector you should buy.

Actually I've read many technical sheets from AMP, Cembre, BM and TE as well and I never found anything useful. I think I'll go for smth Cembre terminal rated to 110°C and for the wire 2,5 mm2 PVC wire within heatshrink.
I found hood temperature is +30°C than outside temp. The worst case scenario is 25°C at night so I think I could manage it. BTW  here I give you some extracts of my job research including details of the mentioned connector

[Monkeh]

TE suggest the limiting factor is the cable, rather than the connector. Considering the substantial contact area, this does not seem unreasonable.

[Charybdis]

Considering the substantial contact area, this does not seem unreasonable.

I'm sorry but I didn't understand your last sentence.
Do you mean that using a 2.5 sqmm cable I'll be fine ?

[Monkeh]

Considering the substantial contact area, this does not seem unreasonable.

I'm sorry but I didn't understand your last sentence.
Do you mean that using a 2.5 sqmm cable I'll be fine ?

A properly mated 'faston' has much more than 2.5mm2 contact area with fairly substantial pressure. You decide what that implies.

[Charybdis]

A properly mated 'faston' has much more than 2.5mm2 contact area with fairly substantial pressure. You decide what that implies.

Really ? I didn't know that faston were so reliable. That's interesting, thanks !
I'll upgrade that line with some 4sqmm then, but I thought I was fine with 2,5 sqmm because I looked in some papers and I found that at ambient temperature of 50-60 °C the ampacity decrease of a 0.7 factor and it goes from 20A to 15A