[GreenKeys] Polar Relay

[Jeffrey D Angus]

Jim Haynes wrote:
> I ran across a wonderful device for the purpose of opto-isolating a TTY
> loop.  It's Fairchild HSR312. 

Data sheet:
http://www.fairchildsemi.com/ds/HS/HSR312.pdf

Mouser has them in stock for about $4 each:
http://www.mouser.com/Search/ProductDetail.aspx?qs=MA%252b40jw2YMpi9VFgfAlv4w%3d%3d

http://www.mouser.com
P/N: 512-HSR312L

The L version has built in active current limiting.

Jeff-1.0
wa6fwi