Hi there Bob, The SOD6 is an oddball to me too, I've only ever seen it
on this device.
Its a SMT Small Outline Diode package, although I can find no reference
to it outside of the
manufacturers data sheet for the SM4T36CA.

Cheers - Matt....

>-----Original Message-----
>From:  Bob Landman [SMTP:[log in to unmask]]
>Sent:  Tuesday, December 14, 1999 7:23 PM
>To:    Matthew Lamkin; DesignerCouncil E-Mail Forum.
>Subject:       Re:      [DC] Search for obsolete components SM4T36CA Transils ?
>
>My sympathies, it's a terrible situation we also sometimes find
>ourselves in.  We are in it now with RS-232 interface ICs that were a
>standard for over 15 years.  No pin for pin replacements so many
>boards will have to be redesigned when we run out of stock.  It's
>worse for us as we need Industrial rated parts (-40 to +85C) and more
>and more vendors are discontinuing them and not even making available
>the MIL version (the end of the Cold War has had a lot of fallout!).
>
>We sometimes use a distributor here in the USA called America II -
>they charge what amounts to highway robbery but sometimes they can get
>the parts.  www.americaII.com
>
>I am not familar with the SOD6 footprint - what is it?  We use
>transorb zeners and use leaded types only.  The take more room BUT as
>they take the brunt of external stress do on occasion blow and need to
>be replaced and we found this to be a faster way to repair units (and
>by being up in the air a bit to disappate energy better.
>
>Regards,
>
>Bob Landman
>H&L Instruments L.L.C.
>Electro-Optics for Industry & Science
>34 Post Road, PO Box 580
>North Hampton, NH 03862
>tel(603)964-1818  fax(603)964-8881
>http://www.hlinstruments.com
>
>----- Original Message -----
>From: Matthew Lamkin <[log in to unmask]>
>To: <[log in to unmask]>
>Sent: December 14, 1999 9:36 AM
>Subject: [DC] Search for obsolete components SM4T36CA Transils ?
>
>
>: HI there everyone, I've been pulling my hair out for the last few
>days,
>: as
>: we have several products designed to use a ST/SGS-Thompson part that
>: appears to have
>: gone obsolete since we last purchased any.
>:
>: Only we didn't know & are now searching for any of these that are
>going
>: spare anywhere in the world.
>:
>: The part is a "Transil"  Bi-directional surge protector type
>SM4T36CA.
>: Any equivalent parts that have been suggested have a different
>footprint
>: (this part uses SOD6.).
>:
>: We have searched the www & exhausted all our suppliers, so now I'm
>: reduced to begging on the streets (well TechNet at least!).
>:
>: Can anyone point me in the right direction?
>:
>: Tia
>: Matthew Lamkin
>: Printed Circuitboard Draughtsman
>: Protec Fire Detection PLC.
>: Protec Hse, Churchill way,
>: Nelson, Lancashire.
>: England UK.
>: Tel 01282 717171
>: Fax 01282 717273
>: Email [log in to unmask]
>:
>