Can anyone help identify this part?

Can anyone help with this:

It is in a T0-220 package (of sorts - 5 leads coming from the bottom vs 3) and has the following markings:

~ 8612 (there are 2 ~ one just below the first one, unable to display it in a text message - the 'humps' are a bit more pronounced).
1573
REL

thanks for any help or cross reference to it.
Tim

 

[Nigel Cook]

<not@home.com> wrote in message
news:17vtjv4oo301ic6ch45asjv9223ig177s9@4ax.com...

Can anyone help with this:

It is in a T0-220 package (of sorts - 5 leads coming from the bottom vs 3)
and has the following markings:

~ 8612 (there are 2 ~ one just below the first one, unable to display it
in a text message - the 'humps' are a bit more pronounced).
1573
REL

thanks for any help or cross reference to it.
Tim

Manufacturer probably National Semiconductor
logo 328 on my file
http://www.eyesurf.co.uk/~nutteing/logo3r.jpg

Manufacture date probably 12 week of 1986

Some context may help,not knowing context I
would guess a small motor speed controller


e-mail (removing .....) diverse2@tcp.co.u.....k
electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse

Nigel,Diverse Devices,Southampton,England