MP55 – Malico Inc. Home » Passive Heat Sink » MP Series » MP55 – Malico Inc. :: MP 55 :: Dimension Model No. L x W (mm) Height (mm) Weight (grams) CAD MP 55-12 55 x 55 11.6 35.0 By request MP 55-15 55 x 55 14.6 39.5 By request MP 55-18 55 x 55 18.6 44.2 By request MP 55-21 55 x 55 20.6 49.0 By request MP 55-23 55 x 55 22.6 52.0 By request MP 55-28 55 x 55 27.6 60.0 By request MP 55-33 55 x 55 32.6 67.7 By request Material : Aluminum 6063 Finish : Black anodize Remarks : Model number MP55-12 indicate 55x55mm is package footprint and 12 mm is overall height , all the dimensions are in arithmetic , the drawing overall height is real dimension :: Rth ( oC/W ) :: Air Velocity / Rth ( oC/W ) 200(LFM) 400(LFM) 600(LFM) MP 55-12 2.68 1.59 1.12 MP 55-15 2.43 1.41 0.95 MP 55-18 2.22 1.26 0.81 MP 55-21 2.05 1.11 0.66 MP 55-23 1.84 0.97 0.56 MP 55-28 1.62 0.84 0.45 MP 55-33 1.38 0.69 0.34