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Chip packages

0603 / 0402 / 0201

Sizes of surface-mount passives (resistors/caps) in hundredths-of-an-inch. 0603 = 0.06" × 0.03".

How it looks

Real image: CORE3588, rendered by KiCad from our board file
12341 mm
CORE3588 top side, beside a power regulator. CORE3588 has 94 parts in 0603 and 23 in 0805, and no 0402 or 0201 passives.
Drawing to scale: 0402 and 0201 are not on CORE3588
08052.0 x 1.25 mm06031.6 x 0.8 mm04021.0 x 0.5 mm02010.6 x 0.3 mm1 mm
The four common sizes drawn to the same scale. Grey ends are the metal contacts that get soldered.
Real image: CORE3588, rendered by KiCad from our board file (angled 3D view)
12
The same parts tilted (KiCad 3D render).

How it works

08052.0 x 1.25 mm06031.6 x 0.8 mm04021.0 x 0.5 mm02010.6 x 0.3 mmthe name is the size, in hundredths of an inch0805 = 0.08 x 0.05 inch: CORE3588's bigger capacitors0603 = 0.06 x 0.03 inch: most of CORE35880402: half the area, harder to place0201: dust-sized; phones use these

Where it fits

These are SMD / SMT parts; each size has its own footprint and is placed by pick-and-place. A decoupling cap is usually 0603 or 0402.

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