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 with a soldered-in 5 V relay, 5mm-pitch terminal blocks for the switch connections, and a top-entry JST SH-style connector for the control connections that works with our selection of 3-pin JST SH-style cables. The included power relay is an Omron G5LE-14-DC5 and is rated for up to 10 A under most conditions.