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Sundown SAZ3500D
Sundown SAZ3500D
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Old 13th March 2019, 04:15 AM   #1
caraudioguy2100 is offline caraudioguy2100
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Default Sundown SAZ3500D

This amp uses FQA24N50 as the outputs .

Mouser shows stock but they are $5.39 each

Wondering if there is a good replacement for them that will work in this amp ?
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Old 13th March 2019, 04:37 AM   #2
seankane is offline seankane  United States
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I just repaired the output stage in one of these and it used IRFP360LCPBF.


The repair was a success and the amp is being driven hard and working great.


You will definitely have to replace the IRS21844SPBF on the driver card.


There is one driver for each side of the outputs. I replaced the one and one side of the outputs and it works great. If you have blown outputs the driver will be defective.


You will have to change all on both sides if you use these FET's. I think I purchased them for around $3.50 each if memory serves? I believe I used arrow or mouser.
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Old 13th March 2019, 05:44 PM   #3
caraudioguy2100 is offline caraudioguy2100
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This amp is using 22 ohm Gate resistors with IRFP06N as the power supply fets .
I donít have any 22 ohm on hand would 47 ohm gate resistors work ?
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Old 14th March 2019, 02:32 AM   #4
caraudioguy2100 is offline caraudioguy2100
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Would anyone happen to know if 47 ohm gate resistors work in place of the 22 ohm gate resistors In this amp
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Old 14th March 2019, 02:42 AM   #5
Perry Babin is offline Perry Babin  United States
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The 22 would be safe. The 47 would be borderline.
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