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Identifying part ST Z9M Y940

One of these has blown on the control board for our dishwasher. I
can't find the part on any website (including ST's own). Can anyone
help me identify what it is and/or a compatiable part that I can get
over the counter in the UK?

Physically, it is a compact, surface mounted 3-pin rectangular package
about 8mm x 4mm, but I think a compatiable hole-mount package could be
made to fit.

There is a tag at the top that I think is commoned with the central
pin, since there is a PCB track passes by both and they are soldered to
it. The left pin and central pin/tag have a relatively large (2mm)
track, so I guess these carry the current (to the valve which I think
is controlled by this line), while the right hand pin has a narrow
track (<0.5mm) heading towards the control logic.

TIA for any help.

IanC
 
R

Ross Herbert

Jan 1, 1970
0
One of these has blown on the control board for our dishwasher. I
can't find the part on any website (including ST's own). Can anyone
help me identify what it is and/or a compatiable part that I can get
over the counter in the UK?

Physically, it is a compact, surface mounted 3-pin rectangular package
about 8mm x 4mm, but I think a compatiable hole-mount package could be
made to fit.

There is a tag at the top that I think is commoned with the central
pin, since there is a PCB track passes by both and they are soldered to
it. The left pin and central pin/tag have a relatively large (2mm)
track, so I guess these carry the current (to the valve which I think
is controlled by this line), while the right hand pin has a narrow
track (<0.5mm) heading towards the control logic.

TIA for any help.

IanC


It is ST Microelectronics Triac 600V, 1A, 10mV gate sensitivity
http://www.st.com/stonline/books/pdf/docs/7474.pdf
 
Ross said:
It is ST Microelectronics Triac 600V, 1A, 10mV gate sensitivity

Hi Ross

Many thanks for your help on that. I'd been stumped by the short form
of the part number.

My local components shop has 600V, 8A, 50mA sensitivity triacs. These
are in a different, larger package, but is it likely that they would
they function OK?

IanC
 
R

Ross Herbert

Jan 1, 1970
0
Hi Ross

Many thanks for your help on that. I'd been stumped by the short form
of the part number.

My local components shop has 600V, 8A, 50mA sensitivity triacs. These
are in a different, larger package, but is it likely that they would
they function OK?

IanC

Hi Ian, Yes I did mean the gate sensitivity was 10mA (not mV).

Since the device in question is for an electrical appliance it is
almost certain you would need a 3 quadrant high commutation type to
guarantee 100% design spec functionality.

Since your original device is SOT223 you should replace it with a
device of the same size, however 1A devices seem to have been
supplanted by 4A types for appliance use. If your pcb pad layout is
universal SOT223/SOT428 then you can use the larger SOT428/D-PAK/TO252
devices which have a 4A rating. Assuming you can do this I would
recommend a Philips BTA204S-600E.
http://www.semiconductors.philips.com/acrobat_download/datasheets/BTA204S_SER_D_E_F_5.pdf

alternatively

BTA204S-600E equivalents are;
ON Semi - MAC4DSMT4
http://www.onsemi.com/pub/Collateral/MAC4DSM-D.PDF
ST Micro - T410-600B
http://www.st.com/stonline/products/literature/ds/7699/t410.pdf

You may be able to get samples from these companies if you go to their
websites.
 
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