Rohm SMD transistors

[dacen]

Any idea where I can get hold of 2SC3722K and complementary 2SA1455K Rohm SMD transistors

 

[Bonsai]

What is it for? Is it for replacment/repair or new design? Hav e you tried looking at alternatives - Fairchild, On, NXP?

 

[boholm]

Try L C Audio Technology / Forside. They are using them in their ZAPfilter.

Me too is curious: What's it for?

 

[h_a]

I don't know these particular ROHM parts, but the complementary ROHM 2SD2391/2SB1561 pair (SMD) you can get from Farnell. Pretty expensive though.

Have fun, Hannes currently having fun with developing a SMD amp ;-)

EDIT: oh I see that's a low noise part - sorry have no alternative at hand!

 

[dacen]

It's for repair. Input stage of a power amp. Any suggestions for equivalent types.

 

[dacen]

It's for repair. Input stage power amp. LC audio does not answer the mail.

 

[h_a]

I see! From experience nice SMD-transistors are hard to get, well in fact everything that would feature properties beyond pure miniaturization (pp-caps or metal film resistors for example) are very hard to get (as DIYer) as SMT.

If there's enough space, could you replace it with a through-hole part? Certainly needs carefull soldering and bending of the leads.

Have fun, Hannes

 

[dacen]

Found one of them here. There are three versions of this, suffix R,S and E, each with a different hfe. The exact type for me would be the one with an E, but I will give it a shot. Have not found the complimentary one yet.
Parts for 2sc3722k at TigerDirect Partsearch