Catalog > Electro-Mechanical Components > Fasteners Hardware > Electronic Hardware > Heatsink Insulators and Bushes Silicone Rubber Washer for Silicone Rubber Washer Silicone Rubber Washer TO247 Part No: WS247 9.55 ZAR inc for 1 Each (Quoting) Add to Cart Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Specifications foil type: foil WS for transistor: TO 247 material: silicone foil, standard tolerance (material thickness): -0 / 0.1 thermal resistance: 0.4 K/W hardness: 75 IRHD thermal conductivity: 1,2 W/m·K temperature range: -40°C... +150°C insulation resistance: 1·1013 Ω·m elongation: 100 % dielectric strength: 10 kV class of inflammability: UL 94 V-0 storage conditions: -20 °C - +50 °C 45 % - 85 % humidity