SMD mosfet ID

[Roger Weichert]

Hi Guys,

I am trying to identify a smd mosfet which is used as a low end switch for a
small pulsator coil.

It is driven by a cmos gate at 5 volts via a 2.7k resistor  ... and the top
end of the coil is attached to 12 volts.

I can barely see any markings but it looks like perhaps 'AS1'

The device package is similar to a SOT-223 but it's body is only 4mm wide by
2mm  ...  3 legs out one side and a tab out the other (which is connected
across the bottom to the centre leg).

Hoping somebody can help, thanks.

Regards,   Roger

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[Alan B. Pearce-2]

>The device package is similar to a SOT-223 but it's body
>is only 4mm wide by 2mm  ...  3 legs out one side and a
>tab out the other (which is connected across the bottom
>to the centre leg).

Sounds like an SC-70 package variation. Sorry cannot help with device ID.
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[Terry Harris]

On Thu, 5 Nov 2009 18:54:11 +1030, Roger Weichert wrote:

>I can barely see any markings but it looks like perhaps 'AS1'

If it is AS1 then BTS50 but it is a darlington.

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[Roger Weichert]

Hi Terry, thanks for the response.

I dont seem to be able to find anything on BTS50  ...  other than some
valves using that number.

Can you point me to a datasheet somewhere please, or a manufacturer.

Regards, Roger




----- Original Message -----
From: "Terry Harris" <terry.harris@...>
To: "Microcontroller discussion list - Public." <piclist@...>
Sent: Friday, November 06, 2009 4:44 AM
Subject: Re: [EE] SMD mosfet ID


>> On Thu, 5 Nov 2009 18:54:11 +1030, Roger Weichert wrote:
>>I can barely see any markings but it looks like perhaps 'AS1'

>
> If it is AS1 then BTS50 but it is a darlington.


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[Roger Weichert]

Hi Allan,

Thanks for your reply.

It doesn't appear to be an SC-70 because at 4mm wide my device is larger
... and it has 3 legs out one side, with a tab out the other.

Regards,   Roger


From: "Alan B. Pearce" <Alan.B.Pearce@...>
Subject: Re: [EE] SMD mosfet ID


> >The device package is similar to a SOT-223 but it's body
>>is only 4mm wide by 2mm  ...  3 legs out one side and a
>>tab out the other (which is connected across the bottom
>>to the centre leg).
>
> Sounds like an SC-70 package variation. Sorry cannot help with device ID.


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[Terry Harris]

On Fri, 6 Nov 2009 08:55:56 +1030, Roger Weichert wrote:

>Hi Terry, thanks for the response.
>
>I dont seem to be able to find anything on BTS50  ...  other than some
>valves using that number.

Sorry my typo try BST50

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[Roger Weichert]

Thanks Terry,

I really appreciate your help. That is the device I'm after.

Thanks very much again.

Regards,   Roger



----- Original Message -----
From: "Terry Harris" <terry.harris@...>
To: "Microcontroller discussion list - Public." <piclist@...>
Sent: Friday, November 06, 2009 9:12 AM
Subject: Re: [EE] SMD mosfet ID


> On Fri, 6 Nov 2009 08:55:56 +1030, Roger Weichert wrote:
>
>>Hi Terry, thanks for the response.
>>
>>I dont seem to be able to find anything on BTS50  ...  other than some
>>valves using that number.
>
> Sorry my typo try BST50
>


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