SMD resistors

A surface-mount resistor is a small rectangular piece of ceramic with silver-plated conductive edges on both ends. An SMD resistor saves space on PCBs and has the resistor value code printed on it, if space is available.
A surface-mount resistor is just as functional as more traditional axial resistors, but it has a lower power dissipation capability and often lower capacitance and parasitic inductance. Surface-mount resistors can be thick-film, which are the most commonly used; thin-film, which are precise and stable; metal-plate, for current sensing; or wire-wound, which are molded rather than flat-chip construction.
Surface-mount resistors are widely used and preferred in electronic equipment because they are small and highly reliable; typically in telecommunications, automotive, and medical equipment, as well as in personal devices, displays, and high-tech research instruments.