O48A and O37I components..........could you please help me to identify them?

[Francesc V.]

They are from a DCC railroad decoder.

I am "almost certain" that O48A might be a N-Channel mosfet, and O37I a P-Channel mosfet...........however, not able to find them with these references.

Thanks in advance for any hint.
Francesc.

[truclacicr]

03XX SPP2303S23RG SOT-23-3L 3 P-Channel Enhancement Mode MOSFET

https://www.cheertech.com.tw/Syncpow...et/SPP2303.pdf

04XX SPN2304S23RG SOT-23-3L 3 N-Channel Enhancement Mode MOSFET

http://www.cheertech.com.tw/Syncpowe...et/SPN2304.pdf

http://markingcodes.com/search/c/03xx
http://markingcodes.com/search/c/04xx

[Francesc V.]

Thanks!!

[Francesc V.]

Are these 03xx and 04xx replaceable by AO3400 & AO3409? These are cheaper and I have them in stock. :-)

I would say yes but happy to have a second opinion.

Regards,
Francesc.

[truclacicr]

AISI, the Vgs cutoff is different, so you will need to determine if that makes a difference in your application.