This is a standardized size for PCB mounted power supplies. Many of these modules also have the same pin-out so that they are interchangeable. They come in a wide variety of input and output voltages and powers, are usually fully isolated, and are highly efficient. It suppose that the term brick comes from the first engineer that dropped a power supply on his toe. The brick power supply dimensions are as follows:
The six standard brick sizes
1. Full brick – 4.6 x 2.4 x 0.5 inches or 116.8 x 61.0 x 12.7mm
2. Half brick – 2.3 x 2.4 x 0.35 inches
3. Quarter brick – 2.3 x 1.45 x 0.35 inches
4. 8th Brick – 1/8
5. 16th Brick – 1/16
6. 32nd Brick – 1/32
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