I need to cross an orion fet part number.... - diyAudio
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Old 17th October 2007, 12:40 AM   #1
ppia600 is offline ppia600  United States
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Default I need to cross an orion fet part number....

Its a power supply fet with a t03p type package. I can't cross it anywhere (I think its an Orion part number since they all have orion stamped before the part number)


ORION 0490-0210
(small triangle)T9512AA

The amp is an Orion cobalt 2100. They look just like the 70 amp mosfets I replaced in an orion hott setup 4.25 back in 1993, but I got those as samples because I couldn't buy them from any suppliers.

The gate resistors are 10 ohm. There are EIGHT in the power supply of this thing. Either thats a beefy power supply or maybe the ones in this amps have a lower ampere rating. Any help appreciated, thanks
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Old 17th October 2007, 12:51 AM   #2
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On the ampguts site, they have one with SMW60N06s. I'm not sure if those or the originals or not. If they are, an IRFP044 would be a good sub.

If the gate resistors are 10 ohms (common in other Orion amps), you could go to IRFP064s but they are probably overkill.
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Old 17th October 2007, 12:58 AM   #3
ppia600 is offline ppia600  United States
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Thanks for the quick help Perry, I'm going to check those out.


I probably should use the higher current ones since the smw60n06 cross through nte (not going to buy that one) was 70amperes
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Old 17th October 2007, 01:57 AM   #4
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The '60' in 60n06 means it's a 60 amp device. The 06 means it's rated for 60 volts. This doesn't necessarily hold for all parts but it should for these.

The IRFP044s are rated for 53 amps. I initially looked at the specs on the Digikey site and that said they were rated for 57 amps. The IRFP064s will be more rugged if the drive circuit is up to the task.
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Old 17th October 2007, 02:12 AM   #5
ppia600 is offline ppia600  United States
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Wow, these specs are amazing. I think the smw60n06 are rated at about 200w dissipation. These must be a misprint... 300w?? And higher current rating, wow.

http://cgi.ebay.com/New-STP80NF10-Po...QQcmdZViewItem
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Old 22nd October 2007, 04:28 PM   #6
ppia600 is offline ppia600  United States
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I've got the IRFP064's on the way, hopefully this amp comes out as well as the ppi I just lucked out with! I'll keep everyone posted
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Old 26th October 2007, 02:52 AM   #7
ppia600 is offline ppia600  United States
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Talking Woohoo!

I got the fets in today and it works with no problems so far. All I need now are some new silicone pads and it will be ready for the road! Thanks a lot as always for the help. Here are a couple of pics of the power supply after repair. The original fets has as much solder as I put, so don't laugh. It looks lumpy, but I was just trying to dab off excess solder, there aren't any cold solder joints. All eight gate resistors were within tolerance surprisingly. The board looks pretty charred but its mostly residue from the fets exploding. The amp sounds great too

Click the image to open in full size.
Click the image to open in full size.
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Old 26th October 2007, 02:59 AM   #8
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Clean up the board with acetone.

Remove it from power and discharge all caps before cleaning it.
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Old 26th October 2007, 02:42 PM   #9
ppia600 is offline ppia600  United States
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I usually just use some cotton swabs with a little isopropyl alcohol. I definately don't have power in the circuit when working on them
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Old 26th October 2007, 11:11 PM   #10
ppia600 is offline ppia600  United States
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Default silicone rubber insulators??

Btw, anyone have eight silicone to3p or to247 style transistor insulators I could paypal for? (the type for the amp above) I don't need anything from mcm and don't want to pay retarded shipping for something that costs $2.29. Would anyone have some they could send me in a postal envelope? I can paypal. I would have posted this in the market section, but it doesn't seem very active
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