Renogy MC4 Y Branch Connectors Solar MC4 Connectors Y connector Solar panel mounts in Pair MMF+FFM Compatible with MC4 connectors Also known as MC4 T connectors CE and TUV certified Hard plastic;Protection Class: Class II Temperature Range: -40C~+90 C One FFM; one MMF Withstanding voltage: 1000V DC(TUV), 600V(UL) Contact Material: Copper, silver plated Flame Class: UL94-V0 or UL94-5VA Protection Degree: IP67, mated Unmating Force: 200 Newton Insulation Material: PC/PA