Toshiba 2SC4793/2SA1837 reborn

[sajti]

Hi,

I just recognized, that Toshiba manufaturing the 2SC4793/2SA1837 again, as TTC011B/TTA006B. Different case, but same chip inside....

Sajti

 

[nashbap]

Hi,

I just recognized, that Toshiba manufaturing the 2SC4793/2SA1837 again, as TTC011B/TTA006B. Different case, but same chip inside....

Sajti

Thanks for sharing.
nash

 

[Mark Tillotson]

Interestingly the base current rating is now 0.5A, not 0.1A, which may represent process improvements, or bonding wire differences or was a misprint in the 2SC4793 datasheet(!)

 

[asuslover]

Thank you for sharing . Power dissipation is different too.

 

[sajti]

Thank you for sharing . Power dissipation is different too.

Of course, as it is depended mainly by the case type.

Sajti

 

[Chamberman]

Toshiba decided to reverse the pin out too.

 

[awpagan]

TTC011B/TTA006B , maybe less power capability than the 2SC4793/2SA1837 but maybe replacement for the BF470/469, I need to look into.

thanks Sajti

 

[grappay]

KEC manufactured also in the market. As good as the original toshiba.

 

[Transistorlegacy]

The SOA curves for the newer Toshiba parts are way lower at higher voltages, looking at their datasheets Unavoidable with smaller dies. 2SA1837 , 2SC4793 still made by UTC, sold at Profusion. They meet all specs. For power transistors, 2SA1302G , 2SC3281G from ON semi are just like originals, and great SOA you won't find in small die formats.

 

[Transistorlegacy]

The SOA curves for the newer Toshiba parts are way lower at higher voltages, looking at their datasheets Unavoidable with smaller dies. 2SA1837 , 2SC4793 still made by UTC, sold at Profusion. They meet all specs. For power transistors, 2SA1302G , 2SC3281G from ON semi are just like originals, and great SOA you won't find in small die formats.

Edit : I meant that Toshiba 2SA1302 , 2SC3281 is now ON MJL1302G , MJL3281G

 

[wg_ski]

No they are not - the MJL versions of the die are even LARGER than the Toshiba original. Check base emitter capacitance - 11 nF vs. about 7. Similar otherwise.

 

[sajti]

The SOA curves for the newer Toshiba parts are way lower at higher voltages, looking at their datasheets Unavoidable with smaller dies. 2SA1837 , 2SC4793 still made by UTC, sold at Profusion. They meet all specs. For power transistors, 2SA1302G , 2SC3281G from ON semi are just like originals, and great SOA you won't find in small die formats.

The die is same, as all internal capacitance are same. The package is the only difference.