Aavid Thermalloy
Part
Number		 Thermal Resistance
°C/W at 3in length		 Width
in		 Height
in		 Surface Area
in?in		 Weight
lb/ft		 Part
Class
73925 1.45 2.88 1.00 48.2 1.20 A

Thermal Curves
 based on 3.000 in length
New Length in mm
 

Natural Convection

  Heat Sink Temperature Rise
Above Ambient 		    Heat Sink
Thermal Resistance
45.0
2.3 3.9 5.3 6.5 7.7 8.9 10.0 11.0 12.0 13.0 14.0 14.9 15.8 16.7 17.6 18.5 19.4 20.2 21.1 21.9 22.7 23.5 24.3 25.1 25.9 26.6 27.4 28.2 28.9 29.7 30.4 31.1 31.9 32.6 33.3 34.0 34.7 35.4 36.1 36.8 37.5 38.2 38.9 39.5 40.2 40.9 41.5 42.2 42.9 43.5
33.8
22.5
11.2
0.0
  2.5 7.5 12.5 17.5 22.5
 
5.00
4.628 3.891 3.516 3.272 3.095 2.957 2.845 2.752 2.672 2.602 2.541 2.486 2.437 2.392 2.352 2.314 2.279 2.247 2.217 2.188 2.162 2.137 2.113 2.091 2.070 2.049 2.030 2.012 1.994 1.977 1.961 1.946 1.931 1.916 1.903 1.889 1.876 1.864 1.852 1.840 1.829 1.818 1.807 1.797 1.787 1.777 1.767 1.758 1.749 1.740
3.75
2.50
1.25
0.00
  2.5 7.5 12.5 17.5 22.5
  Power Dissipated (W)     Power Dissipated (W)

Forced Convection

  Heat Sink Temperature Rise
Above Ambient (25W Dissipated) 		    Heat Sink
Thermal Resistance
  Air Flow (m/s)     Air Flow (m/s)
1.0 2.0 3.0 4.1 5.1
37.5
25.1 23.2 21.7 20.5 19.4 18.5 17.7 17.0 16.4 15.8 15.3 14.9 14.5 14.1 13.7 13.4 13.1 12.8 12.5 12.3 12.0 11.8 11.6 11.4 11.2 11.0 10.8 10.7 10.5 10.4 10.2 10.1 10.0 9.8 9.7 9.6 9.5 9.4 9.3 9.1 9.0 9.0 8.9 8.8 8.7 8.6 8.5 8.4 8.4 8.3
28.1
18.8
9.4
0.0
  200 400 600 800 1000
 
  1.0 2.0 3.0 4.1 5.1
1.50
1.002 0.928 0.868 0.818 0.776 0.740 0.709 0.681 0.656 0.634 0.614 0.595 0.579 0.563 0.549 0.536 0.523 0.512 0.501 0.491 0.481 0.472 0.464 0.456 0.448 0.441 0.434 0.427 0.421 0.415 0.409 0.404 0.398 0.393 0.388 0.383 0.379 0.374 0.370 0.366 0.362 0.358 0.354 0.351 0.347 0.344 0.340 0.337 0.334 0.331
1.12
0.75
0.38
0.00
  200 400 600 800 1000
  Air Flow (LFM)     Air Flow (LFM)

Building a Part Number


Full Bar Length = 8.00ft
Base Part #
Bar
Length		 Finish Length
 (use zeros for full or half bars)
73925
1 Full F Unfinished 0 0 0 0 0
2 Half F Unfinished 0 0 0 0 0
3 Custom B Black Anodized
C Gold Chromate
U Unfinished*
V AavSHIELD3		 indicate length in inches
to three decimal places;
1 5 2 5 0 = 15.250 "

73925 __ __ __ __ __ __ __

*For unfinished extrusions with cut lengths other than half bar, the finish designation is a U.


Standard Aavid Thermalloy parts require all 12 positions to be complete.

Non-Standard Extrusions

Aavid Thermalloy has over 10,000 extrusion profile designs on file, most with the extrusion die already available. These parts have minimum order requirements and longer lead times, but may be cost effective compared to a new design.

Customizing & Advanced Capabilities

We offer several options for those applications which require a more unique solution. Challenge us with your thermal requirements - we can design custom solutions.

For technical help with our Products,
please email us at info@aavid.com, or contact your local Manufacturer’s Rep
Visit us at www.aavidthermalloy.com  •  ©2010 Aavid Thermalloy, LLC