The Pololu basic relay carrier modules allow simple control of a single-pole, double-throw (SPDT) switch from low-voltage, low-current control signals. This item includes the basic carrier PCB along with an Omron G5LE-14-DC5 5 V relay, 5mm-pitch terminal blocks, and 0.1″ male headers in straight and right-angle versions. Surface-mount components are pre-assembled on the PCB, but the through-hole components are not installed. The included power relay is rated for up to 10 A under most conditions.