electronics - unusual resistor value :-)

Pretty normal to have these - but 0.5R is well outside the tolerance (any tolerance!)

They'll also only be 0 ohm at the stated temperature. The resistance will increase with heat - which may be useful.

The zero ohm as a link thingie is quite common with surface mount - but these are conventional components so I doubt that's their main purpose in this case. As plenty such factory boards have wire links.

Machines were used long before SMD's recent popularity (gull wing smd packages have been around for donkeys years but tended to be restricted to military and space applications). I see no reason why the same machines that stuff old fashioned through hole components from bandoliers can't also stuff wire links.

MBQ

well they couldn't..and that's the point. making something up that was shaped like a resistor was a whole lot easier.

Also, finger insertion is much harder with a wire link.

Also wire links laying across open tracks are not a good idea. Even if there is an insulating resist.

So the wire link shaped like a resistor and covered in insulation, was the simplest way out.

It's a 403 noww, I presume it was a surface mount 0 ohm resistor? Normal to use them as links ...

Is that what the picture was? the link is broken so I haven't seen it yet.

MBQ

More like that is the resistance of your multimeter leads. To get an accurate result you need a 4 terminal resistance meter.

Bob

That's right, the actual resistance will be measured in milli-ohms, it's just a very short length of tinned copper wire with a resistor- shaped piece of plastic around it. It's about the same as a 15-amp fuse wire, enough resistance to get hot with 15A passing through, and to melt with 30A.

In message , dave writes

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No, packaged more like this:

Same basic idea though. Link in package that can be handled by the same equipment as resistors.

Try

sorry - should be back now.

Oh, I like the 1% tolerance ...!

In article , Man at B&Q writes

more expensive in production. If you've only a few links and are already using automated through hole insertion equipment then it makes sense to stick with bandoliered component links and a single machine process.

and be careful not to exceed 1/4 W...