A reinforced flame retardant composition comprising: 30-80 wt% of a polymer component comprising 25-65 wt% of a poly(alkylene terephthalate); 5-25 wt% of a poly(phenylene ether); and optionally, 5-35 wt% of a polyamide; 5-30 wt% of a reinforcing mineral filler, preferably talc, 5-35 wt% of glass fibers; 4-25 wt% of a flame retardant component comprising a metal di(C 1-6 alkyl)phosphinate; and an auxiliary flame retardant comprising a phosphate, a phosphite, a phosphonate, a phosphinate different from the metal di(C 1-6 alkyl)phosphinate, a phosphine oxide, a phosphine, a phosphazene, melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, melamine phosphate, a metal hydroxide, a metal borate, a metal oxide, a metal oxide hydroxide, or a combination thereof, preferably melamine polyphosphate; 0.01-2 wt% of a compatibilizing agent; 5-15 wt% of an impact modifier; optionally, 0.1-10 wt% of an additive composition; each based on the total weight of the composition, wherein a molded sample of the composition has a UL94 rating of V0 at a thickness of 1.5 millimeter, a UL94 rating of V0 at a thickness of 1.0 millimeter, a UL94 rating of V0 at a thickness of 0.8 millimeter, a UL94 rating of V0 at a thickness of 0.4 millimeter, or a combination thereof; and wherein the composition exhibits: a comparative tracking index of 250-399 volts, preferably 400-599 volts, more preferably 600 volts or greater as determined in accordance with UL 746A, a mean time of arc resistance of at least 120 seconds as determined according to ASTM D495, or a combination thereof. 30-80 wt% of a polymer component comprising 25-65 wt% of a poly(alkylene terephthalate); 5-25 wt% of a poly(phenylene ether); and optionally, 5-35 wt% of a polyamide; 25-65 wt% of a poly(alkylene terephthalate); 5-25 wt% of a poly(phenylene ether); and optionally, 5-35 wt% of a polyamide; 5-30 wt% of a reinforcing mineral filler, preferably talc, 5-35 wt% of glass fibers; 4-25 wt% of a flame retardant component comprising a metal di(C 1-6 alkyl)phosphinate; and an auxiliary flame retardant comprising a phosphate, a phosphite, a phosphonate, a phosphinate different from the metal di(C 1-6 alkyl)phosphinate, a phosphine oxide, a phosphine, a phosphazene, melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, melamine phosphate, a metal hydroxide, a metal borate, a metal oxide, a metal oxide hydroxide, or a combination thereof, preferably melamine polyphosphate; a metal di(C 1-6 alkyl)phosphinate; and an auxiliary flame retardant comprising a phosphate, a phosphite, a phosphonate, a phosphinate different from the metal di(C 1-6 alkyl)phosphinate, a phosphine oxide, a phosphine, a phosphazene, melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, melamine phosphate, a metal hydroxide, a metal borate, a metal oxide, a metal oxide hydroxide, or a combination thereof, preferably melamine polyphosphate; 0.01-2 wt% of a compatibilizing agent; 5-15 wt% of an impact modifier; optionally, 0.1-10 wt% of an additive composition; each based on the total weight of the composition, wherein a molded sample of the composition has a UL94 rating of V0 at a thickness of 1.5 millimeter, a UL94 rating of V0 at a thickness of 1.0 millimeter, a UL94 rating of V0 at a thickness of 0.8 millimeter, a UL94 rating of V0 at a thickness of 0.4 millimeter, or a combination thereof; and wherein the composition exhibits: a comparative tracking index of 250-399 volts, preferably 400-599 volts, more preferably 600 volts or greater as determined in accordance with UL 746A, a mean time of arc resistance of at least 120 seconds as determined according to ASTM D495, or a combination thereof. a comparative tracking index of 250-399 volts, preferably 400-599 volts, more preferably 600 volts or greater as determined in accordance with UL 746A, a mean time of arc resistance of at least 120 seconds as determined according to ASTM D495, or a combination thereof.