"Bottom entry" SMT connectors for circular pins

Samtec FHP 0.187 pitch connectors have an SMT version. Alignment pins are a useful option.

For multisourcing of smt, sticking with 0.1 pitch, double row might be advisable.

You'd best use pins designed for the socket. Round is convenient for no-one but the mfr of the round pin.

There are also bottom entry female 'faston' receptacles for .187 blade-type pins that aren't very smt, but you're drilling holes anyway, so what the heck? Check out Zeirick 1118-6 / 6118-6.

RL

How about discrete spring-pin sockets?

John

I was looking for some of those, couldn't remember where I had seen them!

Thanks. (I would prefer to have an all-SMT solution but these look good too. Probably better anyway since I get flexibility in pin positioning).

Samtec FHP 0.187 pitch connectors have an SMT version. Alignment pins are a useful option.

For multisourcing of smt, sticking with 0.1 pitch, double row might be advisable.

You'd best use pins designed for the socket. Round is convenient for no-one but the mfr of the round pin.

There are also bottom entry female 'faston' receptacles for .187 blade-type pins that aren't very smt, but you're drilling holes anyway, so what the heck? Check out Zeirick 1118-6 / 6118-6.

RL

Thanks, I am trying to see if we really need the round pins. (It is for a special high pressure hermetically sealed feed-through connector).

Currently I am leaning towards the type JL posted (not SMT) for single pins. All the SMT stuff seems to be for square pin headers.

This little filter board

ftp://jjlarkin.lmi.net/Filter1.jpg

ftp://jjlarkin.lmi.net/Filter2.jpg

uses round machined pins to give us a controlled standoff distance above the main board. The female is broken off a SAMTEC SL-110-G-19 strip. The male, on the VME board, is BBS-110-G-B.

John

top

By bottom entry, the OP means that he wants the pin to penetrate the board before entering the receptacle - and possibly passing through to meet other pass-through or end receptacles on succeeding assemblies.

Tyco/Amp does pass-through pin sockets as illustrated, but the vast majority are sealed at one end. The sealed version can do bottom entry, even in wave-soldered assemblies, through insertion with the correct orientation (and with the open end plugged to prevent solder flow or gold contamination). Even the open-ended versions require this orientation and 'plugging'.

There is always a prefered direction for pin insertion it seems, if only to slacken the tolerance on pin-socket registration, but quite frequently because insertion from other directions is mechanically impossible, due to the retention function and contact area compression features of the hardware's design. Watch for compatible connector contact metalization - gold may not be suitable for repeated insertions or higher power levels.

RL

top

That's right. It doesn't need to actually pass through to anything else. The point is to get near zero spacing under the PCB shown. In fact I can probably accept some small fraction of a mm protrusion on the underside, so those single pins type that push into a hole in the board would be possible.

If there was a rectangular SMT socket specified for round pins that might be less work to assemble.