The RLK-3K is a series of low voltage relays from the Polish manufacturer Relpol. It consists of a range of SPDT/SPST, 5 to 48V AC/DC PCB relay switches. The relays are designed for switching both load currents of up to 3A and power contact ratings of up to 1000VA. This makes them suitable for a wide range of general purpose applications in industrial, automation, security and HVAC systems. The RLK-3K relays feature high-grade Sn plated contacts and insulation materials, along with an impressive life expectancy of up to 10 million operations. They also come with a variety of additional functions, such as an optional open/closed contact seal, with versioning available for higher current ratings and voltage isolation conditions.