What is this component ? smd double diode like, marking code : RX

[corrize]

Hello, do you know what it is this component marked RX please ? I can't find it. Probably it is a part of serie, because I saw another marked RW.

[truclacicr]

Several possibilities here:

http://markingcodes.com/search/c/rx

We would get a better idea if you showed us a photo of the surrounding components.

[corrize]

Thanks for reply. See the area around. In the largest picture, the RX component is missing, you can see 3 pads only. There is a parallele configuration, so the component beside could have the same function (It is a camera DLSR board).
I saw the list of "RX", and I noticed thic component could be a LM4050, maybe ? only because it is a common component, and because in the board that could be a power controleur-regulator, and because that could be in comparison configuration, but.... I guess, it is a general idea, nothing precise ?

[harp]

So use a other RX component and measure it with transistor tester, gain, voltage drop, hopefully its not a ic... I think it is in sot-323 package. The your choosen replacement shall same specification.

[truclacicr]

Are pins 2 and 3 of RX and DQ internally connected? If so, then they are probably diodes (zeners?) or voltage references of some kind.

[kasfamily]

Maybe…

[truclacicr]

I can't see it being a transistor, as the third pin doesn't appear to be connected. Moreover, why would there be two different transistors in two otherwise identical circuits?

[corrize]

Thanks for reply, the original RX is lost, but I found 2 other « RX » side by side on the board (see pictures)
I measured in circuit, in diode mode and resistance mode (see schematics) but the result is not obvious for me ? I guess it is not a zener, and not a diodes, maybe not a transistor because I cant see clearly a « diode ».
I noticed no pin is ground, and I noticed the 2 pins at same sides are linked to same pin to other (see picture).
The board is dead, so the components can be defectives.
If necessary, I can desolder one and measure out of board ?

[truclacicr]

The RX components look like a P-channel MOSFET ???

Did you desolder the gate resistors in your earlier photos?

[kasfamily]

Maybe amplifier …

[truclacicr]

One of the photos shows two G-S junctions in parallel. Two B-E junctions in parallel wouldn't make sense.

How about RZM001P02T2L?

https://www.mouser.com/ds/2/348/rzm001p02-515260.pdf (datasheet)

https://www.aliexpress.com/w/wholesa...001P02T2L.html (photos)

If the device is made in Japan, a Rohm MOSFET would make sense.

[kasfamily]

Dimensions compare can

[corrize]

Mosfet is a good idea. That explain all the measurements « open ».
In the previous photo, RX component and 2 resistors indeed are missing because destroyed by rust (see photo before cleaning, the resistor on top has same value the one beside : 1MOhms).

You found it. RZM001P02T2L match 100% indeed. Probably I would never found it, thanks. I will order it and replace.