Need Help Identifying An SMD Diode

[ghiotom]

The markings are F4 5D and it's about 4 mm long. This is on a Samsung Y sus board. There are 4 or 5 of these spread around on this board. Google couldn't help.

[gilly1984]

Re: Need Help Identifying An SMD Diode

Possible? http://www.marsport.org.uk/smd/mainframe.htm

Marked C2V4 TO C75 (E24 series) BZV55 series 500mW zener diodes (2.4 - 75V)

[drpj23]

Re: Need Help Identifying An SMD Diode

What is the part number of the Y-Sustain?

[ghiotom]

Re: Need Help Identifying An SMD Diode

The markings on the board are D5019 so I don't think it is a zener. The board is LJ-02317A.

[gilly1984]

Re: Need Help Identifying An SMD Diode

Are you sure thats the model number?

Is it LJ41?

[drpj23]

Re: Need Help Identifying An SMD Diode

LJ92-01046A has a similar layout to the picture and has what you gave me on the board somewhere

[ghiotom]

Re: Need Help Identifying An SMD Diode

I'm sorry, I'm an idiot. Indeed it is LJ41-02317A.

[gilly1984]

Re: Need Help Identifying An SMD Diode

I still get a zener

Part number MMSZ5239B

Try this pdf

[budm]

Re: Need Help Identifying An SMD Diode

F4 5D sitting horizontally is Diode D5019 in series with 10 Ohm resistor, the Zener diode ZD5005 is sitting vertically as shown in the picture in post 1
Can I see zoomed out picture of that section? It looks like it is part of the snubber circuits or rectifier for the power supply.

[gilly1984]

Re: Need Help Identifying An SMD Diode

Can we ask why you need to know this? Whats the problem?

I see the markings Bud, just all i can find with them markings are zeners?

[ghiotom]

Re: Need Help Identifying An SMD Diode

Thank you all for your very timely help. The diode in question is actually in this photo. The previous shot was a diode with similar markings that I was able to get a clearer view of, so I apologize if that confused things. I lifted one leg of that diode thinking there was a short and the other leg kind of snapped off. If I had been observant, I would have noticed that it is in parallel with that fuse and 5.2 ohm resistor and thus the low reading.

[gilly1984]

Re: Need Help Identifying An SMD Diode

So where does this leave us? Have you solved your problem?

[ghiotom]

Re: Need Help Identifying An SMD Diode

Unfortunately, I don't know what I can use to replace it. All I know is that it is a diode. Like I said I need to replace it after the leg snapped off right against the body of the diode.

[gilly1984]

Re: Need Help Identifying An SMD Diode

Flow some solder on to it, then check it with diode test on dmm, if it checks out stick it back on.

[ghiotom]

Re: Need Help Identifying An SMD Diode

Ultimately, that's probably what I'll have to do, but since I'm waiting for some parts to come in, I can wait and see if anybody else has any other ideas.

[Duncanbest]

Re: Need Help Identifying An SMD Diode

F4----EC11FS4 xx-----date code


datasheet

http://www.alldatasheet.com/view.jsp?Searchword=EC11FS4

Picture (description 5A is wrong , only 1A in datasheet)
http://detail.china.alibaba.com/offer/759709272.html

[Toasty]

Re: Need Help Identifying An SMD Diode

1A, 100v, high speed switching diode. Look for a trr time of MAX 4ns.

T

[ghiotom]

Re: Need Help Identifying An SMD Diode

Duncanbest, I don't know how you came up with that, I looked everywhere, but I am impressed. I'm guessing that a lot of these common parts are made by Chinese companies with unconventional designations. I noticed some MOSFETs with numbers that I couldn't find any information on. I want to thank everyone for helping me out.

On Edit: I guess this is a Japanese company according to the picture.