To220 twisted vane heat sink aavid thermalloy tv40g to220 twisted vane heatsink aluminium material black anodized finish 9 9 c w thermal resistance to 220 bolt on 38mm long 28mm wide 22mm high a high dissipation twisted vane heatsink black anodised finished pre drilled for a variety of plastic packaged semiconductors may be mounted horizontally or vertically aavid thermalloy tv40g t0220 twisted vane heat sink