An electronic color code is used to indicate the values or ratings of electronicponents, usually for resistors, but also for capacitors, inductors, diodes and others. A separate code, the 25-pair color code, is used to identify wires in some telmunications cables. Different codes are used for wire leads on devices such as transformers or in building wiring.The substrate IC proves important in connecting the chip and the circuit board. Integrated circuits fall under a transitional product that serves to capture semiconductor integrated circuit chip, routing to link the chip with the PCB, and safeguard, support, and reinforce the IC chip, thereby giving it a thermal dissipation tunnel.Suitable for wave soldering shield of electronic circuit board, protection of gold finger and electrical insulation, motor insulation, and positive and negative pole of lithium battery. Ideal for protecting sensitive printed circuit boardponents such as gold leads and gold fingers during the process of wave soldering.Jul 20, 2021 · IPC-2221 insulation resistance test rmendations. Insulation is a basic requirement in a PCB for protection against short circuits between conductors by accidental contact, overheating caused by electric conduction, and corrosion or other environmental damages. A lot of materials can be used to insulate a circuit board.