Fake 2SA1302 transistor

[steevo]

I am building a doug self amplifier using 2SC3281 & 2SA1302 and whe i did a google search to find a suplier i found a few articles say there were low priced fakes around. I found 2 sources of very cheep versions of these transistors as follows:
GoCompononets Mospec 2SA1302 Price £1.68 each
GoCompononets Mospec 2SC3281 Price £1.46 each
Elclondon Toshiba 2SA1302 Price £3.00 each
Elclondon Toshiba 2SC3281 Price £2.98 each

In the first case these Mospec are very cheap, other suppliers put these at over £5.0 2SA1302 — UNBRANDED from cpc.farnell.com .

I found a links sound.westhost.com/fake/counterfeit-p2.htm about fakes and dont know which supllier to trust. Bought a sample from elclondon and the transistors seem ok to look at. Havent tested them.
Has anyone had any experience particularly from GoCompononets.

The Mospec transistor seem too cheap to be true.
Advice anyone

Steevo

[AndrewT]

The Toshibas are obsolete. If they are very old stock they may be genuine, but I believe a major reason for the emergence of the almost identical 1943/5200 was to avoid further confusion with the counterfeiters.
Unfortunately they started fake 1943/5200 lines as well.
Investigate the mospecs, they may be genuine copies but I have no idea of the quality.

Or try to find ONsemi equivalents, MJL1302/3281 or the newer MJL4302/4281

[x-pro]

Farnell sells ON Semi equivalents:

MJL1302G - Farnell # 9557040

MJL3281G - Farnell # 1172585

Price in quantities 1 to 25 - £2-54 +VAT

Cheers

Alex

[steevo]

cpc.farnell sell two versions that appear on the surface to be identical but one is much cheaper than the other.
MJL1302AG = £2.5
MJL1302A = £4.0

Dont know what diference the G at the end makes apart from the price.

Cant find the MJL1302AG on the onsemi site just the MJL1302A version.

Are these exact replacements for 2SA1302/2SC3281.

What are the 1943/5200.

found MJL4302/MJL4281A on the gocomponents AT £7.12ea thats a no go, too expensive.

Thanks
steevo

[richie00boy]

The G probably denotes leadfree (green) version.

The OnSemi parts are clones, much like the MOSPEC ones.

www.profusionplc.com sell the real Toshiba 2SC5200/2SA1943 which would be a better replacement for the obsolete devices listed in the project.

edit: actually you would be better asking Profusion if they are Toshiba, they used to be but now they are listed as "other" yet the gain grading is still the top end one.

[megajocke]

http://uk.digikey.com/ has the Toshiba 2SC5200/2SA1943. They also have the Fairchild version FJL4215/FJL4315. Looks like shipping is €18 to UK.

I bought audio transistors from digikey last month, they even had free shipping on orders over €65 to Sweden.

[jaycee]

Order the Fairchild equivalents of the 2SA1943/2SC5200 - apparently these are excellent. Otherwise, use the Onsemi MJL3281/1302 or 4281/4302.

[Eva]

The MOSPEC clones may be of good quality. I would get a pair and crack open them to see what is inside.

[mlise]

Originally posted by richie00boy
The G probably denotes leadfree (green) version.

The OnSemi parts are clones, much like the MOSPEC ones.

www.profusionplc.com sell the real Toshiba 2SC5200/2SA1943 which would be a better replacement for the obsolete devices listed in the project.

edit: actually you would be better asking Profusion if they are Toshiba, they used to be but now they are listed as "other" yet the gain grading is still the top end one.

Actually, the ONsemi parts are a ground up design, and a decade newer. The gain is much flatter vs collector current for the ONsemi parts, so they actually will work much better. Better still, you can get free samples.

[bigpanda]

I think there is a cross refer page for Fairchild products to the same product from other manufacturer. Anyone knows its web-link? Tks.