For the SK3007A series and for transistors in general, what does the
tab or colored dot indicate in terms of pinout? The collector?
Sometimes the pinout is diagramed but I don't know if they are showing
the top perspective or the bottom perspective, which would be the
opposite.
Thank you.

"zap" wrote in message
...
For the SK3007A series and for transistors in general, what does the
tab or colored dot indicate in terms of pinout? The collector?
Sometimes the pinout is diagramed but I don't know if they are showing
the top perspective or the bottom perspective, which would be the
opposite.
Thank you.

A tab on a package for a standard BJT, usually indicates the emitter. A
paint dot used to indicate the collector, but this is rare now. Almost all
Japanese ( 2SA, B, C, D ) BJT's in a TO92 package have pinning of E-C-B with
the device held pins down, and the flat towards you. Same goes for the much
smaller packages that they use with a chamfered rather than half rounded
back. Unfortunately, same cannot be said for U.S. ( 2N ) series devices, or
European ( BC,BF etc ), where you will nornally need to look them up. Power
devices in all varieties of flatpack such as TO220, Isowatt etc, normally
have pinning of B-C-E, with the device held pins down, and the heat
dissipating surface or metal tab, away from you. Alternatively, the writing
towards you if you prefer to think of it that way. Any exposed metal on the
device is usually common with the collector connection. TO3 "can" type power
transistors' pins are B-E, with the device held pins up, with their offset
from the centre line, away from you. The can is the collector connection.
FETs re-write the book, so I would recommend looking them up - there are
many good free datasheet sources on the net - just Google for them. Pinouts
on schematics and data sheets, where they are just a plan view of the
device, are invariably shown from the bottom looking onto the pins or
leadouts.

Arfa

Thank you for your post. I found no information on pinout and only on
or two instances of specifications. Only bid sheets for companies
wanting you to buy things by the thousands. Thanks again for your
post.

On Sun, 07 Jan 2007 09:37:25 GMT, "Arfa Daily"
wrote:


"zap" wrote in message
.. .
For the SK3007A series and for transistors in general, what does the
tab or colored dot indicate in terms of pinout? The collector?
Sometimes the pinout is diagramed but I don't know if they are showing
the top perspective or the bottom perspective, which would be the
opposite.
Thank you.

A tab on a package for a standard BJT, usually indicates the emitter. A
paint dot used to indicate the collector, but this is rare now. Almost all
Japanese ( 2SA, B, C, D ) BJT's in a TO92 package have pinning of E-C-B with
the device held pins down, and the flat towards you. Same goes for the much
smaller packages that they use with a chamfered rather than half rounded
back. Unfortunately, same cannot be said for U.S. ( 2N ) series devices, or
European ( BC,BF etc ), where you will nornally need to look them up. Power
devices in all varieties of flatpack such as TO220, Isowatt etc, normally
have pinning of B-C-E, with the device held pins down, and the heat
dissipating surface or metal tab, away from you. Alternatively, the writing
towards you if you prefer to think of it that way. Any exposed metal on the
device is usually common with the collector connection. TO3 "can" type power
transistors' pins are B-E, with the device held pins up, with their offset
from the centre line, away from you. The can is the collector connection.
FETs re-write the book, so I would recommend looking them up - there are
many good free datasheet sources on the net - just Google for them. Pinouts
on schematics and data sheets, where they are just a plan view of the
device, are invariably shown from the bottom looking onto the pins or
leadouts.

Arfa

On Sun, 07 Jan 2007 01:56:33 -0800, zap wrote:

Thank you for your post. I found no information on pinout and only on
or two instances of specifications. Only bid sheets for companies
wanting you to buy things by the thousands. Thanks again for your
post.
Try using Google's advanced search and search on datasheet and the part#. That
eliminates a lot of the crud.

"zap" wrote in message ...
Thank you for your post. I found no information on pinout and only on
or two instances of specifications. Only bid sheets for companies
wanting you to buy things by the thousands. Thanks again for your
post.

On Sun, 07 Jan 2007 09:37:25 GMT, "Arfa Daily"
wrote:


"zap" wrote in message
. ..
For the SK3007A series and for transistors in general, what does the
tab or colored dot indicate in terms of pinout? The collector?
Sometimes the pinout is diagramed but I don't know if they are showing
the top perspective or the bottom perspective, which would be the
opposite.
Thank you.

A tab on a package for a standard BJT, usually indicates the emitter. A
paint dot used to indicate the collector, but this is rare now. Almost all
Japanese ( 2SA, B, C, D ) BJT's in a TO92 package have pinning of E-C-B with
the device held pins down, and the flat towards you. Same goes for the much
smaller packages that they use with a chamfered rather than half rounded
back. Unfortunately, same cannot be said for U.S. ( 2N ) series devices, or
European ( BC,BF etc ), where you will nornally need to look them up. Power
devices in all varieties of flatpack such as TO220, Isowatt etc, normally
have pinning of B-C-E, with the device held pins down, and the heat
dissipating surface or metal tab, away from you. Alternatively, the writing
towards you if you prefer to think of it that way. Any exposed metal on the
device is usually common with the collector connection. TO3 "can" type power
transistors' pins are B-E, with the device held pins up, with their offset
from the centre line, away from you. The can is the collector connection.
FETs re-write the book, so I would recommend looking them up - there are
many good free datasheet sources on the net - just Google for them. Pinouts
on schematics and data sheets, where they are just a plan view of the
device, are invariably shown from the bottom looking onto the pins or
leadouts.

Arfa



Try this web site for data sheets.

http://www.datasheetcatalog.com/index.html

Tony

zap wrote in news:9pg1q2lt1oro4il9mcdokpho4hfrdo16ek@
4ax.com:

Thank you for your post. I found no information on pinout and only on
or two instances of specifications. Only bid sheets for companies
wanting you to buy things by the thousands.

You can search for an ECG replacement at
http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm
and then view the data sheet for the replacement, which shows the pinout.

"Tony Marsillo" wrote in message
...

"zap" wrote in message
...
Thank you for your post. I found no information on pinout and only on
or two instances of specifications. Only bid sheets for companies
wanting you to buy things by the thousands. Thanks again for your
post.

On Sun, 07 Jan 2007 09:37:25 GMT, "Arfa Daily"
wrote:


"zap" wrote in message
. ..
For the SK3007A series and for transistors in general, what does the
tab or colored dot indicate in terms of pinout? The collector?
Sometimes the pinout is diagramed but I don't know if they are showing
the top perspective or the bottom perspective, which would be the
opposite.
Thank you.

A tab on a package for a standard BJT, usually indicates the emitter. A
paint dot used to indicate the collector, but this is rare now. Almost all
Japanese ( 2SA, B, C, D ) BJT's in a TO92 package have pinning of E-C-B
with
the device held pins down, and the flat towards you. Same goes for the
much
smaller packages that they use with a chamfered rather than half rounded
back. Unfortunately, same cannot be said for U.S. ( 2N ) series devices,
or
European ( BC,BF etc ), where you will nornally need to look them up.
Power
devices in all varieties of flatpack such as TO220, Isowatt etc, normally
have pinning of B-C-E, with the device held pins down, and the heat
dissipating surface or metal tab, away from you. Alternatively, the
writing
towards you if you prefer to think of it that way. Any exposed metal on
the
device is usually common with the collector connection. TO3 "can" type
power
transistors' pins are B-E, with the device held pins up, with their offset
from the centre line, away from you. The can is the collector connection.
FETs re-write the book, so I would recommend looking them up - there are
many good free datasheet sources on the net - just Google for them.
Pinouts
on schematics and data sheets, where they are just a plan view of the
device, are invariably shown from the bottom looking onto the pins or
leadouts.

Arfa



Try this web site for data sheets.

http://www.datasheetcatalog.com/index.html

Tony

www.datasheetarchive.com and www.alldatasheet.com and
www.allicmall.com are other useful sources

Arfa

Jim Land wrote:

zap wrote in news:9pg1q2lt1oro4il9mcdokpho4hfrdo16ek@
4ax.com:

Thank you for your post. I found no information on pinout and only on
or two instances of specifications. Only bid sheets for companies
wanting you to buy things by the thousands.

You can search for an ECG replacement at
http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm
and then view the data sheet for the replacement, which shows the pinout.


Something missing from the electronic version of the NTE reference is
the footnotes. Some subs are "Electrically Identical", but the pinout
and or case may be different.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Search at: http://stshome.de/smd-code/

Legasteniker wrote:

Search at: http://stshome.de/smd-code/



The SK3007A is not SMD, it is an early germanium TO-1 metal cased
component from the late '60s


Part Number = SK3007A
Manufacturer Name = Various
Description = Ge PNP Power BJT
V(BR)CEO (V) = 16
V(BR)CBO (V) = 32
I(C) Abs.(A) Collector Current = 1.0
Absolute Max. Power Diss. (W) = 1.0
h(FE) Min. Static Current Gain = 55
h(FE) Max. Current gain. = 175
@I(C) (A) (Test Condition) = 5.0m
f(T) Min. (Hz) Transition Freq = 1.5M
Package = TO-1
Military = N

http://www.datasheets.org.uk/specsheet.php?part=SK3007A


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Arfa Daily wrote:

"zap" wrote in message
...
For the SK3007A series and for transistors in general, what does the
tab or colored dot indicate in terms of pinout? The collector?
Sometimes the pinout is diagramed but I don't know if they are showing
the top perspective or the bottom perspective, which would be the
opposite.
Thank you.

A tab on a package for a standard BJT, usually indicates the emitter. A
paint dot used to indicate the collector, but this is rare now. Almost all
Japanese ( 2SA, B, C, D ) BJT's in a TO92 package have pinning of E-C-B with
the device held pins down, and the flat towards you. Same goes for the much
smaller packages that they use with a chamfered rather than half rounded
back. Unfortunately, same cannot be said for U.S. ( 2N ) series devices, or
European ( BC,BF etc ), where you will nornally need to look them up. Power
devices in all varieties of flatpack such as TO220, Isowatt etc, normally
have pinning of B-C-E, with the device held pins down, and the heat
dissipating surface or metal tab, away from you. Alternatively, the writing
towards you if you prefer to think of it that way. Any exposed metal on the
device is usually common with the collector connection. TO3 "can" type power
transistors' pins are B-E, with the device held pins up, with their offset
from the centre line, away from you. The can is the collector connection.
FETs re-write the book, so I would recommend looking them up - there are
many good free datasheet sources on the net - just Google for them. Pinouts
on schematics and data sheets, where they are just a plan view of the
device, are invariably shown from the bottom looking onto the pins or
leadouts.

And beware of some devices like the once very popular BC214 that have a variant
the BC214L with different pinout. I guess this was done so it could substitute
in either of the 2 popular lead configurations.

Graham