Power Transistors and Diodes need an insulation to prevent excessive heat reducing their performance. Inderchand Rajgarhia & Sons Pvt. Ltd. Is an ISO 9001-2000 awarded company that manufactures Power Transistors and Diodes. Inderchand Rajgarhia & Sons Pvt. Ltd. Also offers Washers, Indicators and Tubes. Power Transistors and Diodes come with low leakage, stability under increasing temperature, and high insular strength. Precision punched mica washers help the transistor to be insulated from the chassis and to dissipate the heat away from the transistor and other semi-conductors.