Identifying SMT transistor "43" SOT-23
 

Can anyone identify (what I believe is) a surface mount transistor
labelled as "43" ?

It looks like a SOT-23 package. Possibly PNP looking at the circuit.

This appears to be switching the gate voltage on a triac (switching 240V
mains). The transistor itself is driven straight from a microcontroller
with no limiting resistor ???

My searches match only a Schottky diode barrier - which seems unlikely.

Thanks,

Mark.

Should be a DTC143XK


"Mark Street" wrote in message
...
Can anyone identify (what I believe is) a surface mount transistor
labelled as "43" ?

It looks like a SOT-23 package. Possibly PNP looking at the circuit.

This appears to be switching the gate voltage on a triac (switching 240V
mains). The transistor itself is driven straight from a microcontroller
with no limiting resistor ???

My searches match only a Schottky diode barrier - which seems unlikely.

Thanks,

Mark.

tlw wrote:

Should be a DTC143XK

Thanks for that. The pinout for the DTC143XK seems consistent with the
circuit.

Mark.