SSRs Solid State Relays.

[John Larkin]

On Tue, 11 May 2004 15:18:22 +0100, xxx <xxx@xxx.xxx> wrote:

In message <cqct9054mgsoubp1fo3iiocnhqcthihcbd@4ax.com>, John Larkin
jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> writes
On Sun, 09 May 2004 22:18:31 GMT, "Rich Grise" <null@example.net
wrote:

"John Larkin" <jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote in
message

There are lots of DC ssr's around nowadays. The small ones (surfmount
and dips) are photofets, and the bigger brick-types have various sorts
of isolated drive thingies. They come in unidirectional and
bidirectional versions, so the bi-versions can switch AC too.
...
They are called DC SSRs. Mouser and Digikey stock them.

kick><scream><drag>Whaddaya mean, Twenty-first century!!?!?!??!?!?!!!!!
/drag></scream></kick

;-)
Rich



OK, do you remember liquid-state relays?


Unfortunately, yes. Except these ones were solid state only a few
microseconds earlier and they quickly settled back to a different solid
state after the fuse blew,

A fusing semiconductor would be an interesting switch for one-time
applications, like a detonator. Maybe a metal-intrinsic-metal
structure with a few initiator sites.

John

 

[Guy Macon]

John Larkin <jjlarkin@highSNIPlandTHIStechPLEASEnology.com> says...

OK, do you remember liquid-state relays?

Solid state devices are replacements for gas-filled and vacuum
"filled" devices. If you have ever used vacuum "filled" relays
you know that they have specs that other relays only dream of.
See http://www.kilovac.com/kilovac/default.stm and
http://www.gigavac.com/

There are, of course, mercury relays have liquid in them.

--
Guy Macon, Electronics Engineer & Project Manager for hire.
Remember Doc Brown from the _Back to the Future_ movies? Do you
have an "impossible" engineering project that only someone like
Doc Brown can solve? My resume is at http://www.guymacon.com/