ZTX550 and ZTX300 transistor equivalents

[Gus]

Hi all. I have a circuit diagram that calls for ZTX550 and ZTX300 PNP
transistors.

My local supplier (Australia) does not recognize these numbers. Does
anybody know of an equivalent?

Thanks in advance - Gus

 

[tim kettring]

Gus , if you can determine the base, emitter , collector current and
voltage and frequency; you should be in a position to substitute in
some common xsistors or ICs

tim CET-MD238

Gus <gazman@pobox.com> wrote in message news:<tqqrkvgn1negii6cq9flbn0lggmv367de3@4ax.com>...

Hi all. I have a circuit diagram that calls for ZTX550 and ZTX300 PNP
transistors.

My local supplier (Australia) does not recognize these numbers. Does
anybody know of an equivalent?

Thanks in advance - Gus

 

[INRI]

My book does not show the ZTX550
but the ZTX 300 is listed as a Ferranti
Silicon NPN Low Power Transistor.
300 mW collector dissipation @ 25C
hfe ~50 @ 10ma emitter current.
Collector Max voltage 25v.

Hope this helps a bit.


Jon-UK

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"Gus" <gazman@pobox.com> wrote in message
news:tqqrkvgn1negii6cq9flbn0lggmv367de3@4ax.com...

Hi all. I have a circuit diagram that calls for ZTX550 and ZTX300 PNP
transistors.

My local supplier (Australia) does not recognize these numbers. Does
anybody know of an equivalent?

Thanks in advance - Gus

 

Gus <gazman@pobox.com> wrote:

Hi all. I have a circuit diagram that calls for ZTX550 and ZTX300 PNP
transistors.

My local supplier (Australia) does not recognize these numbers. Does
anybody know of an equivalent?

Thanks in advance - Gus

Hi Gus

check out www.zetex.com to get some specs on these transistors.
These are high performance transistors and will be difficult to substitute.

Good luck

Colin G

 

[tim kettring]

Mabe , it depends entirely on the circuit it is used in .

I once got a junction power transistor to work fine in a circuit
designed for a power-JFET . ( the manufacture schematic did not
specify that , only discovered it when they sent replacements , and it
was not curve-tracable( trashed totaly) )

This was used to turn-on the nav side of an aircraft radio , so
naturally I eventually installed the power JFET from the MFG when it
arrived instead since it was avionics )

tim

<1042241977@127.0.0.1:7501> wrote in message news:<3f60c523$1_1@127.0.0.1>...

Gus <gazman@pobox.com> wrote:
Hi all. I have a circuit diagram that calls for ZTX550 and ZTX300 PNP
transistors.

My local supplier (Australia) does not recognize these numbers. Does
anybody know of an equivalent?

Thanks in advance - Gus


Hi Gus

check out www.zetex.com to get some specs on these transistors.
These are high performance transistors and will be difficult to substitute.

Good luck

Colin G