FR4FR is for “Flame Retardant”. As a printed circuit board is made to work with electricity, it is supposed to resist heat. FR4 has a much better heat resistance than FR1/XPC thanks to a different com
FR4-2L-1.6MM-ENIG-Timer circuit board, timer switch PCB
FR4-4L-Four-layer blue oil circuit board
FR4-2L-1.6MM-LF-HASL-Inverter electronic PCB circuit board
FR4-1.0MM-LF-HASL-Electric guitar speaker PCB
FR4-1.2MM-2L-ENIG-Bluetooth Audio Power Amplifier PCB
FR4-1.0MM-2L-Cordless electric mosquito swatter PCB circuit board
FR4-1.0MM-2L-LF-HASL-Intelligent Lock Circuit Board, Fingerprint Lock Module PCB
FR4-2L-ENIG-Mobile phone charging head PCB
FR4-1.0MM-2L-ENIG-Car Bluetooth Headset PCB
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