FR-4 epoxy glass sheet for electrical insulation panels
Indicative per sheet, excludes 18% GST; confirm on RFQ.
FR-4 grade epoxy glass laminate sheet for electrical insulation panels, spacers, barriers, and custom machined parts.
Fibreglass-reinforced silicone pads carry a woven glass carrier through the middle of the sheet. That carrier resists cut-through when a transistor is bolted down hard against a heatsink edge, so the pad keeps its dielectric barrier under mounting pressure where an unreinforced pad would puncture.
| Dielectric strength | 20 kV/mm |
|---|---|
| Temperature class | Class B / 130C |
| Thickness options | 1.6mm, 3mm |
| Sizes | 300x300mm, 300x400mm, 1000x1000mm, Custom size |
| Backing | Non-adhesive |
| Minimum order | 5 sheets |
| Lead time | 10 working days |
| Manufacturer | Perfect Insulations |
| Grade code | FRP-FR4 |
Supplied as pre-cut package shapes or as sheet stock for your own tooling. The reinforced construction is what lets these run under bolted clamping loads without losing isolation.
This grade is specified most often in the assemblies below. Each page covers the thermal and dielectric requirements of that application in detail.
Specification tables and definitions for this material family, from the Perfect Insulations technical team.
The FRP-FR4 is rated at 20 kV/mm.
Standard thicknesses are 1.6mm, 3mm. Other thicknesses can be produced to order against your drawing.
Stock sizes are 300x300mm, 300x400mm, 1000x1000mm, Custom size. We also supply it die-cut to your own outline, so the sheet size need not constrain the part.
Yes. Perfect Insulations is a converter as well as a supplier — steel-rule die cutting, punching and folding, and slit rolls are all done in-house at our Bengaluru works. Send a drawing or a sample with the annual quantity and we will quote the tooling and the piece rate.
Indicative rates run from ₹240 to ₹3,200 per piece depending on size and thickness, and fall as the quantity rises. Prices exclude 18% GST. The firm rate comes from a quote against your drawing and quantity.
Yes. We despatch nationwide from Bengaluru by courier, with freight charged on parcel weight. GST is billed as CGST+SGST within Karnataka and IGST for every other state.
Perfect Insulations has manufactured thermal and electrical insulation in Bengaluru since 1995, and works to ISO 9001:2015. We supply this grade as sheet stock or die-cut to your drawing, in OEM quantities, across India. See how die-cut parts are made and quoted.