Fischer elektronik heatsinks with combi punching fischer elektronik sk 01 100 sa the fischer elektronik 2 cool rail 111 x 26 x 100mm heat sink has been specially developed for semiconductor design to 3 with combi punching the effective heat dissipation make it ideal for a wide range of applications fischer elektronik sk 01 100 sa cool rail 111 x 26 x 100mm heat sink 2cw