What is the difference between 3240 epoxy board and FR-4 epoxy board?
2026 04/02
3240 Epoxy Board
- Color: Yellow / Amber
- Features: Non-flame retardant, average insulation performance, low cost
- Application: General motor insulation, baffles, gaskets, simple fixtures
- Service life: About 5–8 years indoors
FR-4 Epoxy Board
- Color: Light green / White
- Features: UL94 V-0 flame retardant, high strength, stable dimension, more durable
- Application: Circuit boards, precision fixtures, electronic equipment, battery insulation
- Service life: About 10–20 years indoors
Summary
- For cost saving & general use → Choose 3240
- For flame retardancy, durability & precision → Choose FR-4
- FR-4 is more expensive but performs better and lasts longer
