Good Sanken 2SA1859 & 2SC4883 NOW EOL

Jump to Latest
#25
Dibya said:
@wg_ski may be small companies like UTC Taiwan and CDIL India will make stuff for us.

https://static1.squarespace.com/sta...3267a7f2c7e5e0625a8/1581749035334/CSA1837.PDF

They dont have best of the best FAB and RND like Big Guys
Click to expand...

Second source parts aren’t always as good as the originals. The more generic they are to begin with the easier they are to copy properly. Easy to make a TIP41. Anybody can. Not so easy to make Sanken LAPTs or Toshiba’s particular flavor of triple diffused planar, or even Motorola’s old PowerBase.
 
#26
I can only pray for better future then.
Japanese brand like Denon still using Sanken LATP transistor in their integrated amp.
Luxman is still on Class AB.


Edit: Yamaha still uses Discreate components for their Class AB topology
 
Last edited:
#29
On Semi MJXX281 series are quite good, although many claim that Sanken LAPT types and the original Toshiba 2SC3281 were *better*. I normally don’t split those kind of hairs in my own equipment, but the measured input and output capacitances *are* higher on the ON’s for a given die size. The 0281 gets it down into the range of the original Jap devices, but it *is* a small-die version like the current production TTC5200.

The ON MJE1503x series are in no way comparable to purpose-built 1 to 2A Jap TO-220 “driver” transistors. Intended for similar purposes, but altogether different devices. NOT suitable for VAS duty at all unless run in some compound configuration. Their main benefit is as drivers for multiple pairs where one Jap driver doesn’t have enough SOA, typically in an EF3, with something lower capacitance out in front of it. These Jap (only Sanken and Toshiba are left these days) devices are what is in real danger of disappearing. The Pro audio industry uses 1503x almost universally already.
 
#30
sajti said:
Onsemi NJW3281/1302 are pretty fine. Ordered 20/20pcs from Mouser, and hfe is between 91-94 for all of them!
Click to expand...


It bit subjective , i never liked their sound.

Cordell used those Transistor in his awesome book , i tried those example scheme.

When i used Toshiba output , they sounded better to my ear , not better specs overall but subjective.
 
#31
It's really the end of the road now for high voltage high frequency Bipolar transistors, there's simply not enough volume in the commercial sector to make it financially viable. Manufacturers are moving to Class D where they have greater choice of mosfets.

Two Channel audio amplifiers are a product of a bygone era, multi channel home theatre amplifiers have taken their place.

As diy'ers we're living on borrowed time, down to a literal handful of suitable transistors.

I'm in the process of re-designing a amplifier output stage from EOL Sanken 2SC4883/2SA1859 + 2SC6145/2SA2223 transistors to KSC3503/KSA1381 + Exicon Lateral Mosfets.

People should be aware of building a slewmaster arc welder amplifier as it uses these Sanken EOL transistors.
 
#32
If you want to build an arc welder or woofer cone launcher/voice coil cooker, you can just use whichever outputs/drivers are in current production at any given moment. Or whatever you have stocked up on. At least for the time being. You just won’t be able to split hairs over differences is “subjective” sound quality for very much longer, or get exact replacements if you want/need them. If you have a vintage receiver with dead MT200 LAPTs or any high fT TO-3’s you already need a workaround solution. There will come a time when everything needs a workaround, and then even those will go away. If you’re looking 10 years out, you’d better already have a plan for DIY solutions or be just as SoL.
 
#33
wg_ski said:
On Semi MJXX281 series are quite good, although many claim that Sanken LAPT types and the original Toshiba 2SC3281 were *better*. I normally don’t split those kind of hairs in my own equipment, but the measured input and output capacitances *are* higher on the ON’s for a given die size.
Click to expand...

Sure, I agree. But MJX3281 easily survive, where 2SC5200 fail. So You can use fewer of them.
 
#34
Motorola/ON 3281 is BiGGER than the original Toshiba version, it damn well better be more rugged. 5200 was a step *back*, IMO. They should have just kept the old design since there was nothing inherently wrong with it. Maybe with a new Toshiba house number to distinguish between it, all the fakes, and the Licensed ON version.
 
#38
"It's really the end of the road now for high voltage high frequency Bipolar transistors" , I disagree , All Indian Pro Audio manufacturer uses tons of 5200/1943 in Tons. Still huge market left in Asia. Only one company i know who make class D rest uses Class H design.

Asian market is still their. Here SMPS is more expensive ( Way more than) , than Toroidal Trafo. ( Sounds weird right ? Power of Mass production)



I talked with someone i know who works for Ahuja


Reason which He can come up,

All Marantz ,Denon, Pioneer i have seen in recent years all uses slower Sanken LAPT like 20Mhz , Open any Marantz Denon Pioneer under 1K all have those Sanken. Why Spent more right? Mr. and Mrs. Denon and Marantz. All of their Multichannel setup uses same Transistor. Only their one Denon and two Marantz which are class D , their Class D anti Class D mentality in HiFi community,

Due to global semiconductor shortage , i feel they EOLed their less selling product including their lots of Diode and Mosfet , Not just LAPT transistor.

Global chip shortage expected to last until first half of 2023, says STMicro's CEO | PC Gamer
When ONSEMI acquired Sanyo they even killed their Class D driver like stk350-530t





https://www.ahujaradios.com/power-amplifiers/dual-channel-power-amplifiers/dxa-2502.html


"Class H operation for optimum efficiency."



Those Toshiba BJT are their.

May be some hopeful news from someone in Industry.
 
#39
I have 2 pairs of 2sc4883.... Can I use them as drivers for a 200w rms amp?
Screenshot_20220903_005743_com.android.gallery3d.jpg
 
You must log in or register to reply here.
Top Bottom