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Air Cooled Aluminum Heatsinks

Code designation

O
Letter that characterizes the heatsink pattern to the air cooling system
Number of construction modification
Size (hole diameter for device mounting screw or for contact surface
diameter of mounting hole)
Design type
Heatsink length, mm
Ambient conditions
Type Diameter of thread hole
mm
Outline
(width x length x height)

mm
(without current carrying busbar)
Mass
kg
(without current carrying busbar)
Thermal resistance, ºC/W
(dissipatied power, W)
Pressure differential
Pa
Vcf = 6 m/s
Vcf = 0 Vcf = 6 m/s
O221-60 M6 45x60x67 max
(45x60x60)
0.156(0.153) 5.60(10) -
O131-60 M8 45x60x72 max
(45x60x60)
0.157(0.153) 2.80(18) -
O231-80 M8 45x80x92 max
(45x80x80)
0.369(0.365) 2.12(30) -
O331-80 M8 45x80x118 max
(45x80x80)
0.378(0.365) 2.12(30) 0.670
O141-60 M10 45x60x98 max
(45x60x60)
0.166(0.151) 2.80(18) -
O241-80 M10 45x80x118 max
(45x80x80)
0.375(0.360) 2.12(30) 0.670
O541-80 M10 45x80x131 max
(45x80x80)
0.420(0.360) 1.90(50) 0.670
O151-80 M12 45x80x131 max
(45x80x80)
0.420(0.350) 1.90(50) 0.670
O161-80 M16x1.5 70x80x167 max
(70x80x100)
0.685(0.635) 1.12(80) 0.355
O171-80 M20x1.5 70x80x167 max
(70x80x100)
0.670(0.625) 1.12(80) 0.355
O271-110 M20x1.5 110x110x167 max
(110x110x100)
1.750(1.570) 0.71(130) 0.236
O371-80 M20x1.5 45x80x148 max
(45x80x80)
0.420(0.340) 1.90(50) 0.670
O181-80 M24x1.5 70x80x167 max
(70x80x100)
0.700(0.615) 1.12(80) 0.355
O281-110 M24x1.5 110x110x167 max
(110x110x100)
1.750(1.560) 0.71(130) 0.236
O123-100 22 150x100x122 max
(126x100x122)
2.0(1.84) 0.710(120) 0.212
O143-150 42 185x150x125 max
(135x150x125)
185x150x120 max
(135x150x120)
3.0(2.67) 0.500(120) 0.125
O243-150 42 230x150x170 max
(170x150x170)
5.8(5.00) 0.280(220) 0.080
O353-150 42 230x150x145 max
(170x150x145)
230x150x150 max
(170x150x150)
5.3(4.50) 0.355(220) 0.100
O153-150 55 230x150x176 max
(170x150x176)
6.0(5.20) 0.280(120) 0.750
O253-150 55 230x150x145 max
(170x150x145)
230x150x156 max
(170x150x156)
5.5(4.70) 0.355(220) 0.100