SMD Decoder

Code Input

Component Type (optional)

SMD Code (2-4 characters)

Accepted: Greek Α (Α) and Latin A (A) - recognized as same

Quick examples:

J3Y

W04

SS14

100

101

103

472

4R7

104

103

102

101

Common SMD Packages (Sizes):

SOT-23 (3 pins) SOT-223 SOD-123 SOD-323 SOIC-8 0402 (1.0×0.5mm) 0603 (1.6×0.8mm) 0805 (2.0×1.25mm)

Decoding Results

Enter the code from the SMD component

e.g. "2A", "101", "104", "J3Y" - usually 2-4 letters/numbers in white color

You can select component type for more accurate results

How to read SMD codes:

1. Use a magnifying glass or mobile phone camera

2. The code is usually in white color on the black component

3. It can be very small (a few millimeters in height)

4. Look for lines or dots that indicate pin 1

Tips for Identifying SMD Components

SOT-23 Transistors: 3 pins, codes like 2A, 1A, J3Y, Y1. The same code A7 can be a transistor (BC857B) or diode (BAV99) depending on the package.

SOD-123 Diodes: 2 pins, cylindrical shape, codes like M7, SS14, LL4148. A stripe at one end indicates the cathode.

0603/0805 Resistors: 3-4 digit codes (e.g. 101 = 100Ω, 103 = 10kΩ). Sometimes R-coded (4R7 = 4.7Ω).

0603/0805 Capacitors: 3-digit codes (e.g. 104 = 100nF, 103 = 10nF). First 2 digits = value, 3rd digit = multiplier in pF.

Important: The same code can correspond to different components depending on the size (package) and manufacturer. Selecting component type helps with more accurate results.

Note: The program recognizes both Greek Α and Latin A as the same character.

Code Input

Common SMD Packages (Sizes):

Decoding Results

How to read SMD codes:

Common SMD Codes

Tips for Identifying SMD Components