To 3 heat sink aavid thermalloy pf527 to3 heatsink aluminium material black anodized finish 7 4 c w thermal resistance bolt on 40 8mm long 22 9mm wide 25mm high a low cost diamond shaped heatsink that is suitable for to3 package components black anodised finish aavid thermalloy pf527 heat sink to3 7 4 c w