What pin material should I use for my power supply connector pins?

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Open body power supply producers sometimes use a provider like Molex or JST for their enter and output connectors. These connectors are low price, available, dependable and straightforward to use.  As well as, it makes it simpler for the shopper to second source a power supply, if required, when some standardization exists.

Many power supply producers will specify the mating connector sequence identify of their product documentation, however will usually depart it as much as the consumer to find out the precise half numbers.  This often provokes a name to TDK-Lambda’s Technical Assist for a suggestion.

Why can we do that?  Let’s take the business customary low power 2x4” single output power supply.  The Molex KK® 09-50-3041 housing is broadly specified because the output mating connector. Made from nylon, it has a friction lock and 4 circuits; two for the + output & two for the – output.

When trying for the mating pin, one must be somewhat extra cautious.  The recommended pin for the connector is offered in 2 supplies; brass and phosphor bronze.

Brass is a typical material for contacts and pins.  It's low price, has good conductivity and customarily reliable in a benign, low temperature setting like an workplace.
Phosphor bronze should be thought-about for tougher environments.  At larger temperatures, brass contacts can lose their spring properties in contrast to phosphor bronze.  If there's some vibration, this may trigger reliability issues. Brass does have higher conductivity, so test present ranking functionality.

Phosphor bronze is dearer, 13c in comparison with 5c for brass (1000 piece pricing from a distributor).  For a 2x4” power supply that might add $0.56 to the invoice of material price.  The consumer should think about the setting and desired area life.

As a note, on larger power 2x4" open body power provides (~100W), there are options to the one level of contact KK model pins like these used with Molex's 09-50-1041 housing (SPOX™ sequence).  These have a number of factors of contact for decrease resistance.

As Molex suggested “Totally different terminals have completely different efficiency and completely different traits”.

Power man