This relay board contains 4 relays (choose high nibble or low nibble) which are each rated at 250V and 6A. This is ideal for a wide variety of applications including for use as the output stage of a Programmable Logic Controller based on E-blocks technology. Note that whilst the relays are rated at mains power we can not recommend this board is used at mains rated voltages as it is supplied without a protective casing. This board is compatible with upstream boards operating off 3.3V.