TO-220 Silicone Rubber Transistor Insulator Washers – Pack of 100 (JAYCAR)

You've got a TO-220 transistor that needs thermal contact without the grease smear and the wipe-down. These silicone rubber washers do what mica and thermal paste do, minus the mess. Drop one between the package and your heatsink, torque the screw, done. 100 in the pack, so a full build or a small repair batch is covered. Grey silicone rubber, 40 kg/cm² tensile strength, 94V-0 flammability rating. No paste drying out overnight, no cleanup at 7pm after a long day on the bench

• Silicone rubber washers replace messy thermal grease or mica sheets for TO-220 packages
• 100-pack covers a full build or multiple repair jobs without running short
• Tensile strength 40 kg/cm² with 80% elongation for a secure, repeatable fit
• Dielectric breakdown voltage 4,000 V at 0.3 mm thickness isolates the lead frame cleanly
• 94V-0 flammability class keeps things safe near sustained heat
• Thermal conductance coefficient 2.4 × 10⁻³ W/cm·K for reliable heat transfer