What’s the difference between GPO-3 and G10?

GPO-3 uses polyester resin with chopped glass mat and is flame-retardant (UL 94 V-0), ideal for electrical insulation and structural applications. G10 uses epoxy resin with woven fiberglass cloth, offering higher strength and moisture resistance but no flame rating. GPO-3 is best for switchgear and enclosures; G10 is preferred for PCBs and precision parts.