Hi, recently I'll be going to a local store (pacificsemi in vancouver) to hopefully buy some of these parts. (Real reason is that I need some mica insulators for my amplifier, nobody else sells them in town)
Now, in the past they sold me fake transistors (the mentioned mosfets and 2sc3281/2sa1302) and I'm skeptical that they would be selling genuine Rensas devices.
I got a hold of some genuine Hitachi 2sk1058/2sj162 but was wondering if the renesas version looks different.
Is there anybody with a picture of a genuine renesas k1058/j162?
Now, in the past they sold me fake transistors (the mentioned mosfets and 2sc3281/2sa1302) and I'm skeptical that they would be selling genuine Rensas devices.
I got a hold of some genuine Hitachi 2sk1058/2sj162 but was wondering if the renesas version looks different.
Is there anybody with a picture of a genuine renesas k1058/j162?
Hi Victor,
I think the number in the lower right hand corner is the date code.
Do you have the three indents in the front face? They are shown as small circles in the Hitachi datasheet. The same sheets do not refer to any of the markings.
What is written in them?
One example I have has indent1: MALAYSIA BF7 indent2: B indent3: 7
I think the number in the lower right hand corner is the date code.
Do you have the three indents in the front face? They are shown as small circles in the Hitachi datasheet. The same sheets do not refer to any of the markings.
What is written in them?
One example I have has indent1: MALAYSIA BF7 indent2: B indent3: 7
Theese are mine.
From http://www.tech-diy.com/LATFET.htm here.. They costed me 32$+5$
And they work as a rocket!
An externally hosted image should be here but it was not working when we last tested it.
From http://www.tech-diy.com/LATFET.htm here.. They costed me 32$+5$
And they work as a rocket!
Hi Dx,
nice pics, almost good enough to read the bigger letters in the indents, second from left has a 7 or V in the bottom one.
Can you read us the codes in the circles?
I get the impression they look exactly like my LFETs.
The moulded corners look a bit squarer than Victor's and the indents look deeper.
Could you post a pic of the end of the moulding where the middle pin pokes through? Side lighting will show up the different mould marks well.
nice pics, almost good enough to read the bigger letters in the indents, second from left has a 7 or V in the bottom one.
Can you read us the codes in the circles?
I get the impression they look exactly like my LFETs.
The moulded corners look a bit squarer than Victor's and the indents look deeper.
Could you post a pic of the end of the moulding where the middle pin pokes through? Side lighting will show up the different mould marks well.
Sorry 
Theyre here now;
Theyre here now;
An externally hosted image should be here but it was not working when we last tested it.
What makes you think they are fake ?
Renesas Transistors do not have any other marking than the type number (K1058) and the lot code (5K1 in your case).
The 3 circles are indents from the ejector pin to remove the transistor from the encapculation mold (the black coloured stuff, which is powder filled epoxy)
The package type is Japanese equivalent of TO3P. It looks OK to me. The only way to tell is to measure them (e.g. Vgs at 1A).
Patrick
Renesas Transistors do not have any other marking than the type number (K1058) and the lot code (5K1 in your case).
The 3 circles are indents from the ejector pin to remove the transistor from the encapculation mold (the black coloured stuff, which is powder filled epoxy)
The package type is Japanese equivalent of TO3P. It looks OK to me. The only way to tell is to measure them (e.g. Vgs at 1A).
Patrick
It should be noted that these are quite difficult to fake, and you can test for it if you know what to look for:
1) Source is on the middle pin and tab
2) There are anti-series connected 14V zeners between gate and source
3) There is an antiparalel diode between source and drain
4) The treshold voltage is below 1V and this is the hard part to fake as this is almost unique to laterals. It is very easy to check for using the diode test position available on most DVMs, by connecting drain and source together, then testing for a diode drop between S+G and D (in the reverse polarised direction) or about 0.8-1V in the normally polarised direction.
5) If your DVM has a diode check position, you can also test for MOSFET action - by charging the gate with a positive or negative voltage (just a touch of the DVM probes to the MOSFET pins should be enough), then subsequently measuring the voltage drop between S and D. The gate capacitance is sufficient to retain on or off state for a minute!
1) Source is on the middle pin and tab
2) There are anti-series connected 14V zeners between gate and source
3) There is an antiparalel diode between source and drain
4) The treshold voltage is below 1V and this is the hard part to fake as this is almost unique to laterals. It is very easy to check for using the diode test position available on most DVMs, by connecting drain and source together, then testing for a diode drop between S+G and D (in the reverse polarised direction) or about 0.8-1V in the normally polarised direction.
5) If your DVM has a diode check position, you can also test for MOSFET action - by charging the gate with a positive or negative voltage (just a touch of the DVM probes to the MOSFET pins should be enough), then subsequently measuring the voltage drop between S and D. The gate capacitance is sufficient to retain on or off state for a minute!
Hi,
it is written
A faker is hardly likely to invest in micro writing machinery if their only incentive is to maximise illegal profit.
it is written
if these really are push out holes to allow demoulding then the lettering must have been added after removal from the moulding process, otherwise a postive impression would have been left in the indents. It is difficult to tell without a microscope but I think my lettering is negative i.e. scribed/stamped.
A faker is hardly likely to invest in micro writing machinery if their only incentive is to maximise illegal profit.
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