msg wrote:
Tehrasha Darkon wrote:

6 pin DIP

Only markings are...

65-01
309F
KOREA



My 1996 edition of the ECG Replacement Catalog lists the
ECG3040 Optoisolator as a replacement for '65-01':

Output: NPN Transistor, Viso=7500V, Pt(mw)=250 Ic/If=20%,
If(ma)=80, Vr=3V, BVcbo=70V, BVceo=30V, Ic(ma)=3.5 Ftyp=300KHz

Basing Diagram (top view)

---------
A| 1 6 | Base A = LED anode
| |
C| 2 5 | Coll. C = LED cathode
| |
| 3 4 | Emit.
---------

Regards,

Michael