2SK1529_2SJ200 markings

DaveG · 28th January 2011, 09:28 AM

I'm not clear on the Vgs classification markings on these. Data sheet shows 2 versions: O & Y.
Sellers mostly seem to only list these devices as 2SJ200 or 2SK1529 with no mention of the O or Y. Also, no mention of the "P" on the data sheet.

What do the 3 different markings in the photos represent?
Is the "PY" the same as "Y"?
The middle photo must be the "O" version, correct?
thanks-

HighTec · 28th January 2011, 06:31 PM

Hi Dave,

yes, according to Toshiba's datasheet, there is only Y and O on VGS classification. The 1st picture looks suspicious and smells nasty, probably fakes. On the second pic are definitely counterfeits but on the 3rd are probably genuine transistors. Anyways, I would avoid those transistors with PY markings.

DaveG · 28th January 2011, 07:03 PM

Hello, and thanks for the reply. I was not suspecting fake parts, but I guess it could be possible. I have several from a reliable source with the PY markings, so I’ll assume it is some other variation or grading for now.
I assume they were also manufactured at a few different plants with many different date codes, so there is all sorts of room for small marking variations.
Dave

HighTec · 28th January 2011, 07:31 PM

Hi,

if you have a reliable source, then it's OK.

DaveG · 28th January 2011, 08:19 PM

So the original question is still unanswered. What do the markings equal.
thanks

WuYit · 28th January 2011, 08:28 PM

Hi,
P sometimes appears on the P-channel devices. The Vgs classification marking should always be there.

DaveG · 28th January 2011, 08:30 PM

yes-but it is on both parts
Dave

DaveG · 28th January 2011, 11:50 PM

anyone know what the P equals?
thanks

WuYit · 29th January 2011, 12:33 AM

Dave,
look I`m not sure. The line indicates lead-free device. I`m especially suspicious about the ones in the second picture, the circles should be blank, the dot should be there, the leg tooling is different as well.

DaveG · 31st January 2011, 08:45 AM

Hi WuYit, and thanks for your information,
I'm not sure about the lead-free designation. Could it be just the P? It is difficult to find older catalogs of Toshiba devices that show the markings used, and I could not find an older lead-free standard that gave me any new information. I looked at photos of about 20 older similar Toshiba devices, and many did not have a "P", or a line. If the P equals an older lead-free marking, I would think it would show up on other devices.

I am also not sure how the "O" version is marked, only because I have never seen one. I was hoping the center photo was an example, thinking maybe Toshiba only marked the "Y" devices.

Maybe this whole thing is just a stupid question

, but I like to know the details.

I am going to email some brick and mortar businesses with the question. I just want to insure that all the devices I purchase are the same classification.
Dave

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28th January 2011, 06:31 PM	#2
HighTec diyAudio Member Join Date: Mar 2003 Location: Sibenik, Croatia	Hi Dave, yes, according to Toshiba's datasheet, there is only Y and O on VGS classification. The 1st picture looks suspicious and smells nasty, probably fakes. On the second pic are definitely counterfeits but on the 3rd are probably genuine transistors. Anyways, I would avoid those transistors with PY markings.

28th January 2011, 07:03 PM	#3
DaveG diyAudio Member Join Date: Feb 2007 Location: West Coast - SF Bay Area -	Hello, and thanks for the reply. I was not suspecting fake parts, but I guess it could be possible. I have several from a reliable source with the PY markings, so I’ll assume it is some other variation or grading for now. I assume they were also manufactured at a few different plants with many different date codes, so there is all sorts of room for small marking variations. Dave

28th January 2011, 07:31 PM	#4
HighTec diyAudio Member Join Date: Mar 2003 Location: Sibenik, Croatia	Hi, if you have a reliable source, then it's OK.

28th January 2011, 08:19 PM	#5
DaveG diyAudio Member Join Date: Feb 2007 Location: West Coast - SF Bay Area -	So the original question is still unanswered. What do the markings equal. thanks

28th January 2011, 08:28 PM	#6
WuYit Banned Join Date: Oct 2010	Hi, P sometimes appears on the P-channel devices. The Vgs classification marking should always be there.

28th January 2011, 08:30 PM	#7
DaveG diyAudio Member Join Date: Feb 2007 Location: West Coast - SF Bay Area -	yes-but it is on both parts Dave

28th January 2011, 11:50 PM	#8
DaveG diyAudio Member Join Date: Feb 2007 Location: West Coast - SF Bay Area -	anyone know what the P equals? thanks

29th January 2011, 12:33 AM	#9
WuYit Banned Join Date: Oct 2010	Dave, look I`m not sure. The line indicates lead-free device. I`m especially suspicious about the ones in the second picture, the circles should be blank, the dot should be there, the leg tooling is different as well.

31st January 2011, 08:45 AM	#10
DaveG diyAudio Member Join Date: Feb 2007 Location: West Coast - SF Bay Area -	Hi WuYit, and thanks for your information, I'm not sure about the lead-free designation. Could it be just the P? It is difficult to find older catalogs of Toshiba devices that show the markings used, and I could not find an older lead-free standard that gave me any new information. I looked at photos of about 20 older similar Toshiba devices, and many did not have a "P", or a line. If the P equals an older lead-free marking, I would think it would show up on other devices. I am also not sure how the "O" version is marked, only because I have never seen one. I was hoping the center photo was an example, thinking maybe Toshiba only marked the "Y" devices. Maybe this whole thing is just a stupid question , but I like to know the details. I am going to email some brick and mortar businesses with the question. I just want to insure that all the devices I purchase are the same classification. Dave

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