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Once more Sansui transistor substitutions

ghazzer said:
You always need to consider transistor reference designator codes when you are researching "suitable subs". I haven't yet found anything definitive about KSA and KSC codes. Fairchild? Kennedy Space Center?

There is a good write-up on transistor designations here: https://www.elexp.com/Images/Reading_Transistor_Markings.pdf , but nothing about KSA or KSC.

The three standards listed are JEDEC (Joint Electron Device Engineering Council), JIS (Japanese Industrial Standards), and Pro-Electron (European).

Numbers in the JEDEC are assigned sequentially by dates, thus a higher number indicates a more recent design (or re-design!).

The JIS codes are the ones we see most often, and start with a "1" for diodes or a "2" for transistors. The next 2 letters are:

SA: PNP HF transistor
SB: PNP AF transistor . . .(Audio Frequency)
SC: NPN HF transistor
SD: NPN AF transistor . . .(Audio Frequency)
SE: Diodes SF: Thyristors
SG: Gunn devices
SH: UJT
SJ: P-channel FET
SK: N-channel FET
SM: Triac
SQ: LED
SR: Rectifier
SS: Signal diodes
ST: Avalanche diodes
SV: Varicaps
SZ: Zener diodes

The code for transistors always begins with "2S", and is sometimes omitted. So if you see a "C733" and cannot find any other info, try looking for a "2SC733".

Some manufacturers use their own codes like Motorola's MJE15032 (power transistor, plastic case) or Texas Instrument's TIP112 (power transistor, plastic case).

Maybe this will help someone - - -
Click to expand...
Possible explanation for the "K" instead of "2"
To me the KSA and KSC looks like it could mean "Korea Samsung"?
Since it looks like it was all Samsung partnumbers, and 20 years ago Fairchild bought the Samsung electronics division.
At the moment, it seems KEC calls their 2SC945 transistors "KTC945"
You will find Samsung datasheets when using google and "samsung ksc1845"
 
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Sounds plausible, but the "S" conforms to the original codes, so maybe the "K" is simply "Korea". Anybody else?

WTIC: Perhaps we will soon be deluged with a series of CS?1234 that are "Made in China" . Don't want to start an international incident by observing that this could also stand for "Counterfeit".
 
Here are a few I thought I would share as I'm researching and compiling some parts lists.

Format means OLD/OEM ==> NEW REPLACEMENT

NPN 2SC2578 ==> 2SC4467
PNP 2SA1103 ==> 2SA1694

NPN 2SD357(D,E) ==> 2SC4883/A 150V/180V
PNP 2SB527(D,E) ==> 2SA1859/A 150V/180V

NPN 2SC1735(D,E) ==> KSC2316YTA
PNP 2SA850(D,E) ==> KSA916YTA

NPN 2SD438(D,E) ==> KSC2316YTA
PNP 2SB560(D,E) ==> KSA916YTA

A few diodes and zener diodes

RD24F(B,C) / 1W ==> BZX85B24 / 1.3W 2%

RD18F(B,C) / 1W ==> BZX85B18 / 1.3W 2%

RD18E(B,C) 1/2W ==> BZX55B18 / 1/2W 2%

RD15E(B,C) 1/2W ==> BZX55B15 / 1/2W 2%

RD13E(B.C) 1/2W ==> BZX55B13 / 1/2W 2%

1S2473 ==> 1N4448

30D2 ==> EGP51D

10D-1 ==> EGP20B
 
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Thanks for updated list. I have a SEVEN that I have yet to work on but I assume your list will be a good start toward that restoration.
 
kevzep said:
No longer available, we should put substitutes which are available from regular suppliers such as mouser/digikey.
Click to expand...


These are all available. The arrow, ==>, points to the new replacement part number. ;)

2SC4467
https://www.digikey.com/product-detail/en/sanken/2SC4467/2SC4467-ND/3929397

2SA1694
https://www.digikey.com/product-detail/en/sanken/2SA1694/2SA1694-ND/3929404

2SC4883
https://www.digikey.com/product-detail/en/sanken/2SC4883/2SC4883-ND/3929414

2SC4883A
https://www.digikey.com/products/en?keywords=2SC4883A

2SA1859
https://www.digikey.com/product-detail/en/sanken/2SA1859/2SA1859-ND/3929366

2SA1859A
https://www.digikey.com/products/en?keywords=2SA1859A

No Affiliation


For some unknown reason Vishay changed the EGP50 line to EGP51. I have updated my list.
 
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SoundOfSound said:
These are all available. The arrow, ==>, points to the new replacement part number. ;)

2SC4467
https://www.digikey.com/product-detail/en/sanken/2SC4467/2SC4467-ND/3929397

2SA1694
https://www.digikey.com/product-detail/en/sanken/2SA1694/2SA1694-ND/3929404

2SC4883
https://www.digikey.com/product-detail/en/sanken/2SC4883/2SC4883-ND/3929414

2SC4883A
https://www.digikey.com/products/en?keywords=2SC4883A

2SA1859
https://www.digikey.com/product-detail/en/sanken/2SA1859/2SA1859-ND/3929366

2SA1859A
https://www.digikey.com/products/en?keywords=2SA1859A

No Affiliation


For some unknown reason Vishay changed the EGP50 line to EGP51. I have updated my list.
Click to expand...
Not available at mouser.
Sorry I didn't check Digikey as I don't use them.....
 
super98lsc said:
KSC1845EBU = Obsolete

Superceded by = KSC1845FTA (PIN ORDER!!)
Must install them backwards of original 2SC1313 which is BCE the KSC1845FTA is ECB.

Thanks again this list is AWESOME! :)
Click to expand...
Hi guy,s i,m looking for replacements for au 717 tone board tr01,tr02..tr05 tr06 which are listed as 2sa906 but don,t see any replacements listed for that number but i,m seeing 2sa 726 are in there and ksa992 are listed as replacents for those..is this correct???
 
keven7 said:
Hi guy,s i,m looking for replacements for au 717 tone board tr01,tr02..tr05 tr06 which are listed as 2sa906 but don,t see any replacements listed for that number but i,m seeing 2sa 726 are in there and ksa992 are listed as replacents for those..is this correct???
Click to expand...
2SA906 is only shown (on the Schematic) as used in the EQ or Phono Amplifier board F-2723 (not Tone Control board, F-2720).

KSA992 can be used as a replacement for either 2SA726 or 2SA906. ;)

If in doubt just type the type number '2SA906' into the AK search box (up on the top right) and hit 'search' doing this I just got 54 hits to choose from, many of them mentioning 2SA726 and the AU-717 as well. ;)
 
Hyperion said:
2SA906 is only shown (on the Schematic) as used in the EQ or Phono Amplifier board F-2723 (not Tone Control board, F-2720).

KSA992 can be used as a replacement for either 2SA726 or 2SA906. ;)

If in doubt just type the type number '2SA906' into the AK search box (up on the top right) and hit 'search' doing this I just got 54 hits to choose from, many of them mentioning 2SA726 and the AU-717 as well. ;)
Click to expand...
Sorry 1 and 2 are listed as 2SA798
 
The substitution list has KSA992 (120V, 50mA, 500mW, 100MHz) as a replacement for 2SA850 (100V, 500mA, 800mW, 130MHz) but its collector current rating is too low (50mA vs. 500mA). The listed KSA1013 (160V, 1000mA, 900mW, 50MHz) is better, but has a lower fT (50MHz vs. 130MHz). A better match may be found with the KSA916 (120V, 800mA, 900mW, 120MHz).
 
In case of 2SB527/2SD357 and 2SB526/2SD356, Mouser still carries TTA004B / TTC004B - looks like Toshiba will soon discontinue them

TTA004B / TTC004B - 160V / 1.5A / 1.5W / 140~280 hFE / fT 100MHz / Cob 12pF (17pF)
 
Excuseme..iam a new member in this forum iam from indonesia..i have a amplifier sansui au 217ii but the component many are broken..and i dont have a shematic..does anyone have the scheme and share it with me please
 
ToniCH
Here is a Jan 2020 refresher, including recent inputs. I'll edit this list to add more info, and place an asterisk (*) on the new lines.

Original . . . Substitute
2SA561 --- KSA733C (C= collector center)
2SA562 --- BC327
2SA606/2SC959 --- NTE129MCP (Complementary pair product #)
2SA640 --- KSA992 or ZTX795A
2SA697 --- ZTX795A
2SA706 --- KSA1381ESTU, BD136
2SA726 --- KSA992FTA/-FBU, BC560
2SA733 --- KSA733C (C= collector center)
2SA745 --- MJ15004G, upgrade: MJ21193, 2SA1695
2SA747 --- MJ21193G (for example AU-9900/11000 output), 2SA1695
2SA750 --- KSA992FBU
2SA818 --- KSA1381 (pin order!), KSA1142, (2SA0914?)
2SA839 =/= 2SC1669 MJE15033 or 35
2SA847 --- KSA992
2SA850 --- KSA1013, =/= KSA992
2SA850(D,E) --- KSA916YTA
2SA896 --- KSA1381ESTU (pin order!)
2SA899 --- KSA1142, KSA1220AYS, KSA1381
2SA906 --- KSA992
2SA908 --- MJ21193G, MJ21195G (for example AU-20K output)
2SA914 --- KSA1142, KSA1381
2SA917 =/= KSC916(Y)TA
2SA939 --- KSA1381, KSA1220AY
2SA958 --- 2SA839?
2SA968B --- 2SA1859A
2SA981 --- MJ21193G
2SA992 --- KSA992
2SA1102 --- ? ? ? ?
2SA1103 --- 2SA1694
2SA1105 --- 2SA1695
2SA1106 --- 2SA1695 (avail. fr. Digikey), NJW1302G
2SA1170 --- 2SA1493 or 94 SanKen Case MT200 Late G-7700 output

2SB327 --- KSA1220A
2SB507 --- MJE15033G
2SB507(E,F) --- KSA1010Y
2SB526 --- MJE15033, TTA004B
2SB527 --- MJE15033, KSA1220, TTA004B
2SB527(D,E) --- 2SA1859/A
2SB528 --- 2SA1837 (TO220, fully insulated case)
2SB528(E) --- KSA1220A Case TO-26
2SB536 --- KSA1304Y, MJE15033G
2SB537 --- MJE15031G
2SB545(A) --- MJ21193G
2SB560 --- KSA916, KSA916(Y)TA Case TO92L
2SB560(D,E) --- KSA916YTA

2SC281 --- KSC1815
2SC458 --- 2SC2240, 2SC1345
2SC711 --- KSC945C(G)TA Case TO-92
2SC735 --- BC337
2SC839 --- MJE15033or 35
2SC871 --- 2SC2240, KSC1845, or even BC549C or BC550C (pin out differences!)
2SC875 --- ZTX694B
2SC945 --- KSC945C (C= collector center)
2SC959/2SA606 --- NTE129MCP (Complementary pair product #)
2SC983 --- KSC1845
2SC1116 --- MJ21194G (for example AU-9900/11000 output), 2SC4468
2SC1124 --- MJE15032G or stronger KSC2073
2SC1211 --- KSC2383
2SC1313 --- KSC1815
2SC1364 --- KSC945C (best if used on protection board), KSC2690 (for more demanding use)
2SC1400 --- KSC1845
2SC1402 --- MJ21194
2SC1403A --- MJ15003G, upgrade MJ21194, 2SC4468
2SC1585 --- MJ21194G, MJ21196G (for example AU-20K output)
2SC1628 --- KSC3503 (pin order!), (2SC1953?)
2SC1669 --- MJE15032
2SC1708 --- KSC1845
2SC1735 --- KSC2383, KSC1845
2SC1735(D,E) --- KSC2316YTA
2SC1775 --- KSC1845FTA
2SC1811 --- KSC3503ESTU
2SC1845 --- KSC1845
2SC1904 --- KSC3503, KSC2690AY
2SC1951 --- ZTX694B
2SC1953 --- KSC2682, KSC3503
2SC1983 --- TIP112F or KSD1273Q
2SC2071 --- KSC3503, KSC2690AY
2SC2238 --- 2SC4883
2SC2238B --- 2SC4883A
2SC2261 --- MJ21194G
2SC2577 --- ? ? ? ?
2SC2578 --- 2SC4467
2SC2580 --- 2SC4468
2SC2581 --- 2SC4468 (avail. fr. Digikey), NJW3281G
2SC2774 --- 2SC3857 or 58 SanKen Case MT-200 Late G-7700 output

2SD188(A) --- MJ21194G
2SD247 --- MJ15003G
2SD313(E,F) --- KSC2334Y
2SD356 --- MJE15032, TTC004B
2SD357 --- KSC2690A, KSC2073, TTC004B
2SD357(D,E) --- 2SC4883/A
2SD358(E) --- KSC2690A Case TO126
2SD381 --- KSC3296Y, MJE15032
2SD382 --- MJE15030G, MJE15032
2SD438 --- KSC2316, KSC2316(y)TA Case TO-126


------------------------

Here are some diode and zener subs I've seen mentioned while collecting transistors:

Diodes/rectifiers:
10D1 --- 1N5392, 1N5393, EGP20B
10D2 --- 1N5392, 1N5393, EGP20D
30D2 --- 1N5402G, EGP50D
1S1588 --- 1S2473, 1N4148
1S2473 --- 1N4148, 1N4149, 1N4448
VD1212 --- 2pcs of 1N4148 connected in series
1S1850 --- MUR1620CTG (TO220) - or use 1N5393G (200V 1.5A) or 2A03 (200V/2A) to make your own Common Cathode -diode pack
1S1850R --- MUR1620CTRG (TO220) - or use 1N5393G (200V 1.5A) or 2A03 (200V/2A) to make your own Common Anode -diode pack

Zeners
EQA01-30R (½W) - BZX55B30 - 2%
EQB01-22 --- BZV85-C22 or 1N4748A
RD-13A --- TZX13A-TR
RD-13E(B.C) ½W --- BZX55B13 / 1/2W 2%
RD-15E(B,C) ½W --- BZX55B15 / 1/2W 2%
RD-15E --- ??? Maybe 1N5245BTR, comments?
RD-18E(B,C) ½W --- BZX55B18 / 1/2W 2%
RD-18F(B,C) 1W --- BZX85B18 / 1.3W 2%
RD-18F ---1N4746A, 133
RD-22E --- ??? Maybe 1N5251BTR, Comments?
RD-24F(B,C) / 1W --- BZX85B24 / 1.3W 2%
RD-33F --- BZX85B33-TR
 
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