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Miniature Omron G6K relays


Jeroen Belleman

Jan 1, 1970
Some of you may be interested. Recently, John Larkin mentioned his
use of many Omron G6K-2G-Y-DC5 DPDT relays here. I was interested,
but worried about the capacitive coupling between the two sections,
which isn't mentioned in the data sheet. So I measured it: It turns
out to be about 30fF between the pair of open contacts and about
110fF between the pair of closed ones. I deduce that the moving
parts have about 80fF between them then.

I measured contact-to-coil capacitances too: 200fF for an open
contact and 800fF for a closed pair, after correction for the
pad capacitances.

Jeroen Belleman


Jan 1, 1970
Amazing parts, no? No semiconductor can approach this, much less DPDT
for about $1.50.

Nice data, thanks. Were those 3-terminal measurements? On top of a
ground plane?

I haven't tried making a transmission-line switch and characterizing
the quality, which would be TDR in my world. I'll throw a test layout
on my next multipurpose multilayer hack board.

This was measured on a single-sided board with a fat ground trace
running between the rows. The measuring instrument was a HP5387D
NA. The coupling looked purely capacitive up to some 100MHz.
Beyond that, the curves got bumpy, probably mainly due to my quick
& dirty lash-up.

They are very nice parts indeed.

Jeroen Belleman