Will this heatsink work?

A

Alex77145

Active Member
So I am almost done with selecting all the parts, thanks to this beautiful forum. Now I just need to chose a heatsink.

Will this heatsink work for my Citizen CLU048 1212 3500k 90 cri cobs? I will be running each of them at 49 watts.
The one I'm looking at is the ModuLED Micro 8630-B Sorry, I can't post links.
 
RandomHero8913

RandomHero8913

Well-Known Member
Alex77145 said:
So I am almost done with selecting all the parts, thanks to this beautiful forum. Now I just need to chose a heatsink.

Will this heatsink work for my Citizen CLU048 1212 3500k 90 cri cobs? I will be running each of them at 49 watts.
The one I'm looking at is the ModuLED Micro 8630-B Sorry, I can't post links.
Click to expand...
Not really. It's a little bit small. It's rated at dissipating 28W and you'll have around 32W of heat coming at it according to the CitiCalc. The 8650-8680 would be okay.
 
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HalfBee

HalfBee

Well-Known Member
The 8630s work fine with my Vero18s at 35 watts (1A) but if I were going to run them at 50 I'd go 8650 or even a larger diameter 13420 (nice and thin and not quite a frisbee).

Did you choose the 8630B because it was the only thing on the website that showed any inventory?
 
A

Alex77145

Active Member
HalfBee said:
The 8630s work fine with my Vero18s at 35 watts (1A) but if I were going to run them at 50 I'd go 8650 or even a larger diameter 13420 (nice and thin and not quite a frisbee).

Did you choose the 8630B because it was the only thing on the website that showed any inventory?
Click to expand...
I did some calculations with formulas I found online and calculated that I need a thermal resistance of 1,87 or lower. This heatsink wat the cheapest one I could find that was below 1,87.
 
HalfBee

HalfBee

Well-Known Member
Looks like you've done your homework, and kudos on going passive.
But if you order some, double the number, or order some spares.
You might want to add more Cobs later (or second light) and if you
can afford a few extras they (probably) won't go to waste.
 
A

Alex77145

Active Member
HalfBee said:
Looks like you've done your homework, and kudos on going passive.
But if you order some, double the number, or order some spares.
You might want to add more Cobs later (or second light) and if you
can afford a few extras they (probably) won't go to waste.
Click to expand...
So I could use this heatsink? :D
 
KonopCh

KonopCh

Well-Known Member
Hey guys, what temp do you have on heatsinks? Mine are at air temp - 30-32°C (using 12V DC fan on each 500mm heatsink bar).
 
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