What's this transistor?

badboy6120 · 1st October 2011, 09:34 PM

Hi

I have an old kit(door buzzer) and I want to repair it
it has 2 transistor with the name "A1283" and I want to know the whole name of it like, 2SA1283 or.......

Can anyone help me with that???????

c2cthomas · 1st October 2011, 10:06 PM

I'm not positive - but take a look at this.
2SA1283 pdf, 2SA1283 description, 2SA1283 datasheets, 2SA1283 view ::: ALLDATASHEET :::

tomchr · 1st October 2011, 10:11 PM

Yep. 2SA1283.

badboy6120 · 2nd October 2011, 04:04 AM

thank you

do you guys know some replacement for this part?

c2cthomas · 2nd October 2011, 04:07 AM

Look up sub's for it - we will tell you if you are correct.

wrenchone · 2nd October 2011, 06:19 AM

The data sheets linked here say it's a "TO-92 mod" package with 900mW dissipation, but the device in the picture is clearly a plain-jane TO-92. (?) I would replace it with an MPSW56, or perhaps a 2SA965 (if you can find that one...). Both of those devices are in the long TO-92 package.

Enzo · 4th October 2011, 01:18 AM

One thing to be careful of. There are "American" type nimbers like 2N3904, and "jalanese" type numbers like (2S)C945. And you can find equivalents in both number systems. ANd electrically you can replace one with the other. HOWEVER, the USA types all have the leags arranged as E-B-C, whereas teh Asian types have the leg arrangement E-C-B. SO if you swap one for the other, you will need to turn the transistor sideways so the legs can go in the appropriate holes in the circuit board.

SO if that MPSW would work, just make sure to wire it correctly.

B&D Enterprises at least lists the 2SA1283 as out of stock, but they also say this:
Replace with 2SB647A. But of course they don;t have those either.

siliconray · 8th October 2011, 08:50 AM

Maybe we can find 2SA1283. The only problem is the quantity. Had to find a supplier wich to sell 1 or even 10. 100 pcs for TO-92 transistor is the MOQ in most cases.

Enzo · 8th October 2011, 08:34 PM

SInce it is a door buzzer, I have to think the part is not critical at all, and that the circuit is probably not very sensitive to type here. Of course I have been wrong before. I'd suspect most any PNP transistor meeting the minimal specs ought to work.

wrenchone · 9th October 2011, 02:18 AM

The approach mentioned is probably the most expedient one. Since the device in the picture is clearly in a standard TO-92 package, any TO-92 PNP with proper voltage/current rating would work in its place. I have no idea what is commonly available in Malaysia, but I'd go with an MPSA56 (with a twist to get the right leads in the right holes as suggested).

1st October 2011, 09:34 PM	#1
badboy6120 diyAudio Member Join Date: Feb 2011 Location: Malaysia	What's this transistor? Hi I have an old kit(door buzzer) and I want to repair it it has 2 transistor with the name "A1283" and I want to know the whole name of it like, 2SA1283 or....... Can anyone help me with that??????? __________________ .................................................. ..................... Nothing is impossible, you just need to believe this

1st October 2011, 10:06 PM	#2
c2cthomas 49 - for the 16th time diyAudio Member Join Date: Oct 2006 Location: Near "Music City" (Nashville Tennessee)	I'm not positive - but take a look at this. 2SA1283 pdf, 2SA1283 description, 2SA1283 datasheets, 2SA1283 view ::: ALLDATASHEET ::: __________________ "You can't always get what you want" K. Richards/M. Jagger *** "Next time I will know some things better" Zen Mod

1st October 2011, 10:11 PM	#3
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	Yep. 2SA1283. __________________ "50 % of the game is mental and the other 50 % is being mental. I've got that part down, no problem." http://www.neurochrome.com/audio

2nd October 2011, 04:04 AM	#4
badboy6120 diyAudio Member Join Date: Feb 2011 Location: Malaysia	thank you do you guys know some replacement for this part? __________________ .................................................. ..................... Nothing is impossible, you just need to believe this

2nd October 2011, 04:07 AM	#5
c2cthomas 49 - for the 16th time diyAudio Member Join Date: Oct 2006 Location: Near "Music City" (Nashville Tennessee)	Look up sub's for it - we will tell you if you are correct. __________________ "You can't always get what you want" K. Richards/M. Jagger *** "Next time I will know some things better" Zen Mod


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

2nd October 2011, 06:19 AM	#6
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	The data sheets linked here say it's a "TO-92 mod" package with 900mW dissipation, but the device in the picture is clearly a plain-jane TO-92. (?) I would replace it with an MPSW56, or perhaps a 2SA965 (if you can find that one...). Both of those devices are in the long TO-92 package.

4th October 2011, 01:18 AM	#7
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	One thing to be careful of. There are "American" type nimbers like 2N3904, and "jalanese" type numbers like (2S)C945. And you can find equivalents in both number systems. ANd electrically you can replace one with the other. HOWEVER, the USA types all have the leags arranged as E-B-C, whereas teh Asian types have the leg arrangement E-C-B. SO if you swap one for the other, you will need to turn the transistor sideways so the legs can go in the appropriate holes in the circuit board. SO if that MPSW would work, just make sure to wire it correctly. B&D Enterprises at least lists the 2SA1283 as out of stock, but they also say this: Replace with 2SB647A. But of course they don;t have those either.

8th October 2011, 08:50 AM	#8
siliconray diyAudio Member Join Date: Sep 2011	Maybe we can find 2SA1283. The only problem is the quantity. Had to find a supplier wich to sell 1 or even 10. 100 pcs for TO-92 transistor is the MOQ in most cases. __________________ www.siliconray.com High Quality Audio Enclosures, Amp Kits, Amplifiers, PCB Fab Services Chat with me

8th October 2011, 08:34 PM	#9
Enzo diyAudio Member Join Date: Sep 2004 Location: Lansing, Michigan	SInce it is a door buzzer, I have to think the part is not critical at all, and that the circuit is probably not very sensitive to type here. Of course I have been wrong before. I'd suspect most any PNP transistor meeting the minimal specs ought to work.

9th October 2011, 02:18 AM	#10
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	The approach mentioned is probably the most expedient one. Since the device in the picture is clearly in a standard TO-92 package, any TO-92 PNP with proper voltage/current rating would work in its place. I have no idea what is commonly available in Malaysia, but I'd go with an MPSA56 (with a twist to get the right leads in the right holes as suggested).

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Can I build up these Darlington transistor if I use two BJT transistor ?	gaborbela	Parts	9	15th July 2010 06:30 PM
who knows this transistor?	sethiyadav	Power Supplies	6	2nd February 2010 07:50 AM
Can bias transistor mount on top(body) of output transistor??	Leolabs	Solid State	23	16th February 2008 12:35 AM
Transistor name	ObliVion	Everything Else	1	21st October 2004 09:34 PM
Best Transistor?	samsagaz	Solid State	13	18th October 2004 09:22 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read