What are these components?

Thread Starter

drkblog

Joined Oct 4, 2012
109
Hello. Here we go again :) What are these?



Markings

1. 07 / K250 / 9538
2. SCK 2R55A
3. Gold, Yellow, Green, Brown
4. 9740J / SFH 617-2 / X001
5. BY / 206 / F831
6. Various colors
7. BZX / 5V6 / 55C

And: What's a "GLASS PASSIVATED JUNCTION RECTIFIER"?
 
Last edited:

MrChips

Joined Oct 2, 2009
30,618
I am gonna make guesses here:
1. MOV
2. MOV
3. MOV
4. Bridge rectifier
5. Diode
6. Diodes
7. 5.6V Zener - the only one I am certain of
 

Dodgydave

Joined Jun 22, 2012
11,277
1,2,3 are Surge protectors, or Inrush limiters (movs)
4,bridge diodes
5,6 diodes
7, 5.6v zener

All look like they are from a power supply.
 

Thread Starter

drkblog

Joined Oct 4, 2012
109
Thank you both!

I have a bunch of diodes (figure 6) they seem to be silicon (0.6V). But is there any hope of finding out more information?

5 was a diode, actually, with 528mV tension (silicon I guess).

Should I keep these MOVs? Is there a chance of using them while designing a circuit?

Update:

4 is an optocoupler >> http://www.alldatasheet.com/view.jsp?Searchword=SFH617-2
 
Last edited:

THE_RB

Joined Feb 11, 2008
5,438
3 may be a thermistor. Try measuring it's resistance cold and again after holding a soldering iron NEAR it for a while. If so it might be useful. Otherwise if they are all MOVs probably no use to you at all. :)
 

t06afre

Joined May 11, 2009
5,934
Most of these components look like they have come from a switch-mode power supply. Number four is certainly not a bridge rectifier. It is a 5.3 kV optocoupler from the SFH617A series quite common in switch-mode power supplies. In picture six. The component with a red band in the middle is most probably an inductor. The rest some kind of diodes I will guess.
 

larryhfish

Joined Oct 11, 2012
1
There are two styles of passivation for rectifiers. Silicone rubber and glass. Rectifiers can absorb moisture through the plastic package. Glass passivation seals the sides of the junction preventing additional leakage current. Silicone rubber is supposed to do the same job, but it is invariably not so good. Pay any extra cost you have to for the glass passivation or your rectifiers will fail after just a few weeks.
 

kubeek

Joined Sep 20, 2005
5,793
Why should any modern rectifier in plastic package fail after a few weeks? Not to say an IC in a plastic package?
What you claim souds fishy to me.
 

THE_RB

Joined Feb 11, 2008
5,438
... In picture six. The component with a red band in the middle is most probably an inductor. The rest some kind of diodes I will guess.
Sorry but I believe they are all glass diodes. That one with a red band is a common look for a 400mW zener.
 
Top