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Thermal pad and electrical insulation guides

Reference guides from Perfect Insulations, a Bengaluru manufacturer of thermal pads and electrical insulation since 1995. Each covers one question with our catalogue data: package pad sizes, insulation classes, the units on a datasheet, and what to send when requesting a custom part.

Reviewed by the Perfect Insulations technical team · Updated 2026-09-24

All guides

Custom die-cut insulation parts: what to send with your RFQWhat to include when requesting a quote for custom die-cut thermal pads or insulation parts — drawing, material, thickness, quantity, backing and GST details.Electrical insulation classes explainedThe IEC 60085 thermal classes — Y, A, E, B, F, H, 200, 220 and 250 — with their temperature ratings, and which insulation materials carry which class.Fibreglass-reinforced and plain silicone thermal pads comparedHow fibreglass-reinforced and plain silicone thermal pads differ in construction, thickness, conductivity, format and minimum order, with full grade data.FR4, G10 and G11 epoxy-glass sheet comparedFR4, G10 and G11 epoxy-glass laminate sheet compared by dielectric strength, thermal class, thickness and sheet size, with the NEMA grade definitions.Nomex, Mylar, PET and Gar-Flex insulation comparedNomex aramid paper, Mylar and PET polyester film and Gar-Flex APA laminate compared by insulation class, temperature rating, stock thickness and format.Thermal and electrical insulation units explainedPlain definitions of the units on thermal pad and insulation datasheets — W/m·K, kV/mm, insulation class, UL94 flame ratings, mil and micron — with conversions.TO-220, TO-247, TO-264 and TO-3P insulator pad sizesStock insulator pad sizes for TO-220, TO-247, TO-264 and TO-3P packages: dimensions, mounting holes, grades and prices, from a Bengaluru maker.

Frequently asked

Who manufactures thermal pads in Bengaluru?

Perfect Insulations, at 133, 10th A Main Road, 3rd Stage, Rajajinagar, Bengaluru 560010, has manufactured thermal pads and electrical insulation since 1995 under an ISO 9001:2015 quality system.

Do you supply across India?

Yes. Orders are despatched nationwide from Bengaluru by courier, with freight charged on parcel weight.

Can I buy online?

Fibreglass-reinforced TO-package pads can be bought directly within the quantity band shown on the thermal solutions page, and paid by UPI. Other grades, larger quantities and custom parts are supplied against a quotation.

Do prices include GST?

No. Prices are indicative per-unit rates excluding 18% GST, billed as CGST+SGST within Karnataka and IGST for other states.

How do I request a quote?

Use the request-a-quote form on the contact page, or WhatsApp +91 98450 01203, with your drawing or specification, the material, thickness and quantity.

Request a quote

Perfect Insulations has manufactured thermal and electrical insulation in Bengaluru since 1995 and works to ISO 9001:2015. Send your drawing or specification with the material, thickness and quantity.

Request a Quote WhatsApp +91 98450 01203