Mystery transistor? TAG1000 (Actually an SCR). - UK Vintage Radio Repair and Restoration Discussion Forum

k_yller · 7th Jul 2018, 6:45 pm

Hi
few days ago I found in workshop mystery transistors(?)
metal case TO-66 marked TAG 1000
uncle google are blind in this case
anybody know anything?

G6Tanuki · 7th Jul 2018, 7:03 pm

Almost certainly a "house code" - something produced for a particular contract issued by a reasonably large company who could do a volume-related deal with a semiconductor manufacturer.

Sometimes these are 'specially tested and selected' parts from a mainstream production-line; other times they're actually parts that have failed the manufacturer's own-brand QA/test-specs but are nevertheless good-enough to still be sold for use in less-demanding applications.

ms660 · 7th Jul 2018, 7:08 pm

TAG Semiconductors Ltd?

Lawrence.

Restoration73 · 7th Jul 2018, 7:28 pm

Raytheon-TAG, Zurich. It is very likely this device is a thyristor or triac. Easy to check
on an Avo or similar, one of the pins is the gate.

evingar · 7th Jul 2018, 9:17 pm

Quote:

Originally Posted by Restoration73

Raytheon-TAG, Zurich. It is very likely this device is a thyristor or triac. Easy to check
on an Avo or similar, one of the pins is the gate.

Indeed:

6 Amp 1000V SCR

http://www.gpecsrl.net/componenti-el....html?id=28147

k_yller · 11th Jul 2018, 8:26 pm

Thanks for help

7th Jul 2018, 6:45 pm	#1
k_yller Pentode Join Date: Jan 2014 Location: Huddersfield, West Yorkshire, UK. Posts: 129	Mystery transistor? TAG1000 (Actually an SCR). Hi few days ago I found in workshop mystery transistors(?) metal case TO-66 marked TAG 1000 uncle google are blind in this case anybody know anything?

7th Jul 2018, 7:03 pm	#2
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,010	Re: mystery transistor? TAG1000 Almost certainly a "house code" - something produced for a particular contract issued by a reasonably large company who could do a volume-related deal with a semiconductor manufacturer. Sometimes these are 'specially tested and selected' parts from a mainstream production-line; other times they're actually parts that have failed the manufacturer's own-brand QA/test-specs but are nevertheless good-enough to still be sold for use in less-demanding applications.

7th Jul 2018, 7:08 pm	#3
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: mystery transistor? TAG1000 TAG Semiconductors Ltd? Lawrence.

7th Jul 2018, 7:28 pm	#4
Restoration73 Nonode Join Date: Jun 2013 Location: Surbiton, SW London, UK. Posts: 2,801	Re: mystery transistor? TAG1000 Raytheon-TAG, Zurich. It is very likely this device is a thyristor or triac. Easy to check on an Avo or similar, one of the pins is the gate.

11th Jul 2018, 8:26 pm	#6
k_yller Pentode Join Date: Jan 2014 Location: Huddersfield, West Yorkshire, UK. Posts: 129	Re: Mystery transistor? TAG1000 Thanks for help