Thermally conductive sheet

A thermally conductive sheet of a cured product of a silicone composition, comprising:

• (a) organopolysiloxane having 2 to 10 alkenyl groups only in a side chain:
• 100 parts by mass;
• (b) organohydrogenpolysiloxane having hydrosilyl groups at both ends:
• an amount such that the number of moles of the hydrosilyl groups falls within the range of 0.75 to 1.3 of the number of moles of the alkenyl groups derived from the component (a);
• (c) a thermally conductive filler:
• 1,000 to 4,200 parts by mass;
• (d) a platinum-based curing catalyst:
• 0.1 to 1,000 ppm relative to the component (a) in terms of weight for a platinum group elements;
• and
• (e) dimethylpolysiloxane having one end blocked with a trialcoxysilyl group:
• 15 to 200 parts by mass,
• wherein the thermally conductive sheet has a hardness of 7 or less as measured by an ASKER Durometer Type C, maximum stress of 0.7 MPa or less as measured when the thermally conductive sheet having an initial thickness of 1.5 mm was compressed by 50% at a compression speed of 3 mm/min, residual stress of 0.1 MPa or more, and a ratio of the max stress to the residual stress of 7/1 or less.