The pin of voltage regulation SMD diode is also divided into positive and negative poles as the general-purpose SMD diode, which can generally be identified according to the mark on the package, such as the diode symbol, the length of the lead, color wheels, color spots.

How do I read SMD components?

The Types of SMD Components Its first and second digits are significant digits, and the third digit indicates the multiple of 10, such as “103” indicates “10KΩ”, “472” is “4700Ω”. The letter “R” means a decimal point, for example, “R15” means “0.15Ω”.

How do I know my IC markings?

If the markings on the chip are still legible, it is possible to markings:

1. If there are clear part numbers on the chip, the first letters are called the IC Company Prefix or manufacturer prefix.
2. If there is a logo on the chip, it’s relatively easy to find the manufacturer based on its logo.

What is a surface mount diode?

A diode is a two-lead electronic device that allows electrical signals to pass in one direction but not in the other. While most diodes have two wires with which to connect them to a circuit board, a surface mount diode has no such wires. Instead, each end of the diode is metallic and solders directly onto a small pad on the circuit board.

What is surface mount component?

Surface-mount technology (SMT) is a method for producing electronic circuits in which the components are mounted or placed directly onto the surface of printed circuit boards (PCBs). An electronic device so made is called a surface-mount device (SMD).

How to read Transistor markings?

Reading Transistor Markings Most transistor markings follow one of these codes: JEDEC, JIS or Pro-Electron. For ICs, look for known numbers (e.g. 741, 4001, 7400) between the prefix and the suffix. Don’t confuse it with the date code. ICs typically have two numbers: The part number and the date code. 1. Joint Electron Device Engineering Council (JEDEC)