diode identification

[chavanne]

hello guys..
can you help me to identify a diode?

Drawing DO-41 mini,
and as marks is: one blue colored ring at left,
then 2 lines(one above the other):
on the first line only one digit: 4
on the second line only on letter B
the body is cylindric and black
----------
_____ |]]] 4 |_______
|]]] B |
----------
] ]____ 2 lines one below the other
]_______ Blue ring

Thanks,
-chavanne

 

[rezer]

Someone else might recongize the numbers you've given. But it would help if you could post a close-up picture of the part.

 

[chavanne]

Here is a DOWNLOAD LINK for the close-up:

https://www.hotshare.net/image/79760-5617108285.html
FILE NAME: diode4B.jpg
FILE SIZE: 41.42 KB

The color is green
thanks

 

[ericgibbs]

Here is a DOWNLOAD LINK for the close-up:

https://www.hotshare.net/image/79760-5617108285.html
FILE NAME: diode4B.jpg
FILE SIZE: 41.42 KB

The color is green
thanks

hi,
If you say what equipment the diode was used on it would help.
Also why do you think it is defective.?

A circuit diagram if you have one, would be ideal.

 

[chavanne]

hi,
It was in the switching power supply of a cx3200 printer. This diode is short circuited, like the 2 transistors of the switching stage.
The cathode of the diode is connected to the collector of a NPN C4408 and the anode to the emitter.
No circuit diagram.
thank.

 

[rezer]

Well, not much information. It's a shame mfg can't print the full numbers on a part with so much real estate.

 

[Boncuk]

Just a guess, but it might help.

The package looks pretty much like the 1N54XX type diode. Use an 1N5404 or higher for replacement. Continuous current 3A.

 

[chavanne]

I agree with the 54 but
the package of 1N54XX is do-201ad or like. It to big.
The diode i am looking for is packaged in a do-41 mini or do-15.
I thinks it is a silicium 1NXX54 (5 for the green color, 4; and B for silicium).
However, i will try a FR202, a 2A fast recovery diode, wich mach the transistor in voltage, current and speed.
thanks

 

[rezer]

Just a guess, but it might help.

The package looks pretty much like the 1N54XX type diode. Use an 1N5404 or higher for replacement. Continuous current 3A.

The 1N54XX package is more elongated. This one is shorted and rounder.