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Power NPN transistor N344AB

Started by slampen January 1, 2011
Hi,
My Peugeot 406 heater blower control module ceased to work the other 
day, and its power transistor is open.  Must be an NPN since it is 
supposed to PWM the blower motor to earth (-12V).

When searching N344* I find a lot of references to 2N344n.. (2N3440, 
2N3442... etc) but not this the exact version.

I've uploaded an image of the 'fat' case here:

http://kuntigi.net/download/N344AB-1.jpg

Any suggestions to an equivalent for this..?

Thanks and Happy New Year to all :-)

Geir
On Jan 1, 4:33=C2=A0am, slampen <sla1...@gmail.com> wrote:
> Hi, > My Peugeot 406 heater blower control module ceased to work the other > day, and its power transistor is open. =C2=A0Must be an NPN since it is > supposed to PWM the blower motor to earth (-12V). > > When searching N344* I find a lot of references to 2N344n.. (2N3440, > 2N3442... etc) but not this the exact version. > > I've uploaded an image of the 'fat' case here: > > http://kuntigi.net/download/N344AB-1.jpg > > Any suggestions to an equivalent for this..? > > Thanks and Happy New Year to all :-) > > Geir
I couldn't find the A or AB version of it. Some indication comes from an earlier version of it. Instead of an NPN power transistor it looks like a PNP low power VHF switching transistor. Did they change it a LOT when they went to the AB designation? http://engisys.info/transistor.php?transistor=3D3213 Name: 2N344 Material of 2N344 transistor: Ge Structure of 2N344 transistor: pnp Maximum collector power dissipation of 2N344 transistor (Pc): 20mW Maximum collector-base voltage of 2N344 transistor (Ucb): 5V Maximum collector-emitter voltage of 2N344 transistor (Uce): 5V Maximum emitter-base voltage of 2N344 transistor (Ueb): - Maximum collector current of 2N344 transistor (Ic max): 5mA Maximum junction temperature of 2N344 transistor (Tj): 85=EF=BF=BDC Transition frequency of 2N344 transistor (ft): 20MHz Collector capacitance of 2N344 transistor (Cc), Pf: 12 Forward current transfer ratio of 2N344 transistor (hFE), min/max: 22T Manufacturer of 2N344 transistor: CSR Case of 2N344 transistor: TO23 Application of 2N344 transistor: VHF, Low Power
Den 01.01.2011 12:45, skrev Greegor:
> I couldn't find the A or AB version of it. > > Some indication comes from an earlier version of it. > Instead of an NPN power transistor it looks > like a PNP low power VHF switching transistor. > Did they change it a LOT when they went to the AB designation?
Hi This ought to be a high power NPN transistor. The heater blower motor is a powerful fan fused with a dedicated 40A fuse, so I suspect the current flowing through the transistor is at least 30A at full speed. The collector is connected to the fan and the emitter is connected to ground. When I short-circuit collector and emitter the blower runs at full speed. Can it be some kind of OEM type number? regards Geir
"slampen" <sla1244@gmail.com> wrote in message 
news:8o8jd4FsvrU1@mid.individual.net...
> Den 01.01.2011 12:45, skrev Greegor: >> I couldn't find the A or AB version of it. >> >> Some indication comes from an earlier version of it. >> Instead of an NPN power transistor it looks >> like a PNP low power VHF switching transistor. >> Did they change it a LOT when they went to the AB designation? > > Hi > > This ought to be a high power NPN transistor. The heater blower motor is > a powerful fan fused with a dedicated 40A fuse, so I suspect the current > flowing through the transistor is at least 30A at full speed. > > The collector is connected to the fan and the emitter is connected to > ground. When I short-circuit collector and emitter the blower runs at > full speed. > > Can it be some kind of OEM type number? > > regards Geir
Try BUW48.....
Den 01.01.2011 13:17, skrev TTman:
> > Try BUW48..... >
Ok... Fact or (wild) guess? I don't want to put in something which will be fried or might fry the CAN bus circuitry.... Geir
"slampen" <sla1244@gmail.com> wrote in message 
news:8o8osjFrj4U1@mid.individual.net...
> Den 01.01.2011 13:17, skrev TTman: >> >> Try BUW48..... >> > Ok... > > Fact or (wild) guess? > > I don't want to put in something which will be fried or might fry the CAN > bus circuitry.... > > Geir > >
can't see that you need anything special.... this one is rated at 40 amps.... there must be plenty more out there.
Greegor wrote:

> On Jan 1, 4:33&#2013265922; am, slampen <sla1...@gmail.com> wrote: > >>Hi, >>My Peugeot 406 heater blower control module ceased to work the other >>day, and its power transistor is open. &#2013265922; Must be an NPN since it is >>supposed to PWM the blower motor to earth (-12V). >> >>When searching N344* I find a lot of references to 2N344n.. (2N3440, >>2N3442... etc) but not this the exact version. >> >>I've uploaded an image of the 'fat' case here: >> >>http://kuntigi.net/download/N344AB-1.jpg >> >>Any suggestions to an equivalent for this..? >> >>Thanks and Happy New Year to all :-) >> >>Geir > > > I couldn't find the A or AB version of it. > > Some indication comes from an earlier version of it. > Instead of an NPN power transistor it looks > like a PNP low power VHF switching transistor. > Did they change it a LOT when they went to the AB designation? > > http://engisys.info/transistor.php?transistor=3213 > > Name: 2N344 > > Material of 2N344 transistor: Ge > Structure of 2N344 transistor: pnp > Maximum collector power dissipation of 2N344 transistor (Pc): 20mW > Maximum collector-base voltage of 2N344 transistor (Ucb): 5V > Maximum collector-emitter voltage of 2N344 transistor (Uce): 5V > Maximum emitter-base voltage of 2N344 transistor (Ueb): - > Maximum collector current of 2N344 transistor (Ic max): 5mA > Maximum junction temperature of 2N344 transistor (Tj): 85&#65533;C > Transition frequency of 2N344 transistor (ft): 20MHz > Collector capacitance of 2N344 transistor (Cc), Pf: 12 > Forward current transfer ratio of 2N344 transistor (hFE), min/max: > 22T > Manufacturer of 2N344 transistor: CSR > Case of 2N344 transistor: TO23 > Application of 2N344 transistor: VHF, Low Power
http://www.datasheetdir.com/75344G+Power-MOSFETs Jamie
slampen wrote:

> Hi, > My Peugeot 406 heater blower control module ceased to work the other > day, and its power transistor is open. Must be an NPN since it is > supposed to PWM the blower motor to earth (-12V). > > When searching N344* I find a lot of references to 2N344n.. (2N3440, > 2N3442... etc) but not this the exact version. > > I've uploaded an image of the 'fat' case here: > > http://kuntigi.net/download/N344AB-1.jpg > > Any suggestions to an equivalent for this..? > > Thanks and Happy New Year to all :-) > > Geir
http://www.datasheetdir.com/75344G+Power-MOSFETs Maybe Jamie
On Sat, 01 Jan 2011 09:53:37 -0500, Jamie
<jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote:

>slampen wrote: > >> Hi, >> My Peugeot 406 heater blower control module ceased to work the other >> day, and its power transistor is open. Must be an NPN since it is >> supposed to PWM the blower motor to earth (-12V). >> >> When searching N344* I find a lot of references to 2N344n.. (2N3440, >> 2N3442... etc) but not this the exact version. >> >> I've uploaded an image of the 'fat' case here: >> >> http://kuntigi.net/download/N344AB-1.jpg >> >> Any suggestions to an equivalent for this..? >> >> Thanks and Happy New Year to all :-) >> >> Geir >http://www.datasheetdir.com/75344G+Power-MOSFETs > >Maybe > > >Jamie
Nice catch! Shorting C and E by the OP to run the fan would actually be shorting D and S. I think the OP needs to look more at the base/gate drive part of the circuit, now. Jon
On Sat, 01 Jan 2011 07:12:22 -0800, Jon Kirwan
<jonk@infinitefactors.org> wrote:

>On Sat, 01 Jan 2011 09:53:37 -0500, Jamie ><jamie_ka1lpa_not_valid_after_ka1lpa_@charter.net> wrote: > >>slampen wrote: >> >>> Hi, >>> My Peugeot 406 heater blower control module ceased to work the other >>> day, and its power transistor is open. Must be an NPN since it is >>> supposed to PWM the blower motor to earth (-12V). >>> >>> When searching N344* I find a lot of references to 2N344n.. (2N3440, >>> 2N3442... etc) but not this the exact version. >>> >>> I've uploaded an image of the 'fat' case here: >>> >>> http://kuntigi.net/download/N344AB-1.jpg >>> >>> Any suggestions to an equivalent for this..? >>> >>> Thanks and Happy New Year to all :-) >>> >>> Geir >>http://www.datasheetdir.com/75344G+Power-MOSFETs >> >>Maybe >> >> >>Jamie > >Nice catch! Shorting C and E by the OP to run the fan would >actually be shorting D and S. I think the OP needs to look >more at the base/gate drive part of the circuit, now. > >Jon
... assuming it was a TO-220/TO-247 style package. Did the OP say? Jon