finding that VN0106N5 ( N ch power Mosfet) hard to find - is now been dropped from the supertex product list , and VN0109N5 is also dropped from what i can see, some suppliers on the net show some stock and i am looking to get one.
VN0106N5 - To220 - 60v @2.5A , VN0109N5 - 90v @2.5 , there are many equiv for voltage and current but not many with a @ 5ns turn on / turn off delay time , most mosfets have higher delays typicality about 40ns or more but have greater power output that i have found so far.
if you know of an VN0106N5 equivalent me know ASAP
Also note that if your looking for Q4 - IRF130 - T03 package they are on the net , Q4 on the MX500 shows a IRF 530 on the cct , and its in T0220 package , with same spec's but not fun to retro mount by the looks on RFG-30 heatsink
Old topic I know, but I recently came across this topic looking for repair tips for a couple of defect Metcal MX-500 power supplies.
So the below might be useful to others searching for replacements for obsolete MOSFETs in Metcal power supplies.
The text is a copy of a reply I made in the
DIY Metcal 13.56 MHz RF Supply topic:
https://www.eevblog.com/forum/projects/diy-metcal-13-56-mhz-rf-supply/msg434497/#msg434497I've just repaired two MX500 power supplies (won at an eBay auction), with the help of the schematic and documentation here:
https://www.mikrocontroller.net/attachment/193474/MX-500P-11.pdfMirror:
http://scopetechniques.com/Metcal/MX-500P-11.pdfThe documentation says:
Q3 = VN0109N5
http://scopetechniques.com/Metcal/465-1342-0-VN0109.pdf /
http://scopetechniques.com/Metcal/VN0109N5.pdfQ4 = IRF530(N)
http://www.irf.com/product-info/datasheets/data/irf530npbf.pdf But in the two defect MX500's I bought they were different:
Q3 = IRF510
http://www.irf.com/product-info/datasheets/data/irf510pbf.pdfQ4 = IRF640N
http://www.irf.com/product-info/datasheets/data/irf640npbf.pdfBoth branded International Rectifier.
The amber/orange led lit up all the time in my two defect devices while the green led was always off.
I found out Q4 was shorted in both devices and after replacing it with a new IRF640N both devices work again.
It looks like Q3 (IRF510) had been replaced before in at least one of the devices, so not sure if they came with Q3 = IRF510 and Q4 = IRF640N from the factory. But it seems to work, at least so far.
Has anyone else seen an MX500 with Q3 = IRF510 and Q4 = IRF640N?
Looks like
VN0109N5 from Supertex is obsolete, so maybe Metcal started using IRF510 instead?
Now when you search
Supertex.com VN0109 seems to only be available in wafer / dies and TO-92 housing called
VN0109N3, but no TO-220 option.
And for Q4, IRF640N is a 200 V MOSFET, while IRF530(N) from the schematic is only rated at 100 V, so maybe they have replaced it because there was problems with too high voltage spikes, toasting the IRF530's? Doesn't look like IRF530N is obsolete.
Haven't done any measurements after repairing them, so not sure about the voltages Q4 handles? But since the IRF640N was toast in both of them, maybe that's not the issue?
Much to my surprise I also received a Metcal solder stand with the defect power supplies, even though this wasn't advertised. A very nice surprise as Metcal solder stands are actually very expensive and I didn't have any. Later I received a new and very nice MX-H1-AV handpiece as a birthday gift.
This came from RS Components where MX-H1-AV seems to be quite cheap compared to many others for some reason, even though RS usually isn't know for being cheap. So if anyone needs a new MX-H1-AV alloy handpiece for your DIY, Metcal or Thermaltronics/Easy Braid power supply, try to check out the price at you national RS Components site.