Part Spec Help! (possible 2n4484)

Apogee · 6th March 2007, 05:25 PM

Hello everyone,

Does anyone have a reference manual that lists this part?

It has what looks to be either N4484, M4484 or possibly H4484

The other number on it looks to be 102*4 with the * being a 0, 3 or 8 (either 0 or 3 I think)

If the *4484 is a date code then this will give an idea of the vintage.

They are TO-220 cased devices.

I'm working on a DC speed control unit and I think this is the original part number. Unfortunately, the parts are very poorly screened so it's very difficult to read.

I don't have a schematic and can't figure out who made this...

I'm trying to find a suitable substitute.

Thanks for the help!

Netlist · 6th March 2007, 07:53 PM

Usually, the part number is on top, down comes the date code.
A search results in 1N4484, 2SC4484, 74484, HD44840 and TDA4484.
None of these are TO220 or come even close to being a voltage regulator or something similar.

/Hugo

Apogee · 6th March 2007, 08:00 PM

Thanks Netlist.

Motorola also made a 2N4484 and that is what I was looking for specs on.

(Hopefully)

Thanks!

Netlist · 6th March 2007, 08:05 PM

Quote:

Originally posted by Apogee
Thanks Netlist.

Motorola also made a 2N4484

Really? Hang on.

/Hugo

Netlist · 6th March 2007, 08:15 PM

Strange. Even the big ECA database can not find 2N4484.
Google give many results but non of them of any value.
The highest number I could find in the 2N44xx range was 2N4453.

/Hugo

Apogee · 6th March 2007, 10:21 PM

Hugo,

Thanks for checking.

Basically the same as I found...

Still hoping...

6th March 2007, 05:25 PM	#1
Apogee diyAudio Member Join Date: Feb 2002 Location: Tacoma, WA	Part Spec Help! (possible 2n4484) Hello everyone, Does anyone have a reference manual that lists this part? It has what looks to be either N4484, M4484 or possibly H4484 The other number on it looks to be 1024 with the being a 0, 3 or 8 (either 0 or 3 I think) If the *4484 is a date code then this will give an idea of the vintage. They are TO-220 cased devices. I'm working on a DC speed control unit and I think this is the original part number. Unfortunately, the parts are very poorly screened so it's very difficult to read. I don't have a schematic and can't figure out who made this... I'm trying to find a suitable substitute. Thanks for the help! __________________ "If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once a week." - Charles Darwin

6th March 2007, 08:00 PM	#3
Apogee diyAudio Member Join Date: Feb 2002 Location: Tacoma, WA	Thanks Netlist. Motorola also made a 2N4484 and that is what I was looking for specs on. (Hopefully) Thanks! __________________ "If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once a week." - Charles Darwin

6th March 2007, 10:21 PM	#6
Apogee diyAudio Member Join Date: Feb 2002 Location: Tacoma, WA	Hugo, Thanks for checking. Basically the same as I found... Still hoping... __________________ "If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once a week." - Charles Darwin

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6th March 2007, 07:53 PM	#2
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Usually, the part number is on top, down comes the date code. A search results in 1N4484, 2SC4484, 74484, HD44840 and TDA4484. None of these are TO220 or come even close to being a voltage regulator or something similar. /Hugo

6th March 2007, 08:15 PM	#5
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Strange. Even the big ECA database can not find 2N4484. Google give many results but non of them of any value. The highest number I could find in the 2N44xx range was 2N4453. /Hugo

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