A 27 ohm surface-mount device (SMD) resistor is a type of resistor designed to be mounted directly onto a printed circuit board (PCB). These resistors are characterized by their small size and flat rectangular shape, which allows them to be easily placed and soldered onto the surface of a PCB.

The “27 ohm” designation indicates the nominal resistance value of the resistor, which is 27 ohms. This resistance value determines how much the resistor will impede the flow of electric current through a circuit.

SMD resistors are widely used in electronic circuits for various purposes, including current limiting, voltage division, signal conditioning, and impedance matching. They are commonly employed in electronic devices such as smartphones, computers, televisions, and automotive electronics.

Due to their compact size and surface-mount design, SMD resistors are ideal for applications where space is limited and for densely populated PCBs where components need to be closely spaced. They offer advantages in terms of assembly efficiency, reliability, and performance compared to through-hole resistors.