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Sir, 

Can anyone help me finding Replacement of Power Transistors;

2SD613 - NPN , 2SD633 - PNP both complimentary pairs 

2SD600  & 2SB631 both complimentary pairs

The above are used in power amplifier sections of Sonodyne Model SCR2061. The exact transistors not readily available in India.

Thanks in advance, 

Regards

 

 

 

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Hi,

2SD613 NPN has replacement BD243C, BD543C, BD801, 2SD866 BD243C KT819G

2SD633 is a NPN Darlington transistor and has replacement BD649, BD901, BDW73C, BDX53C BD649

2SD600 has replacement BD139, BD230, BD379, 2SD1684 BD139

2SB631 has replacement BD140, BD231, BD380, 2SA1184 BD140

 

 

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what is the replacement for the d13005ed?

Perhaps the MJE13005G ? The data sheet is online.

The MJE13005G   from China
see: https://www.ebay.com/itm/5PCS-X-UTC-MJE13005G-C-TM3-T-TO-251-I-PAK-NPN-Vceo-700V-Ic-4A-Transistors/333530195913? hash=item4da7f2e7c9:g:9MgAAOSwr9ReWXce

The D23005Ed  20 of them! "20 x D13005ED Transistor TO-220"    from China.

https://www.ebay.com/itm/20-x-D13005ED-Transistor-TO-220/184022252029?hash=item2ad894b9fd:g:cLQAAOSwOFZdwBIz

also see for large list of similar transistors:
https://alltransistors.com/crsearch.php?at=Si&struct=NPN&pc=65&ucb=700&uce=400&ueb=9&ic=4&tj=150&ft=4&hfe=15&caps=TO220

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I have a problem using lm7812 it produced output voltage I connected 48v battery as input voltage but this 12v output didn’t carry just dc fan please what’s the solution to this problem but I remember I do not filter this terminals 

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48 volts is above the absolute voltage for this voltage regulator: 35 volts maximum:

Untitled.png.5839314500023c98c601cab7cddf94f5.png

 

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