The SE Relays 861H series, patented solid-state, UL certified for Class I Division 2 Hazardous Locations per ISA 12.12, relay offers an energy-efficient SCR AC zero cross current switching device with input voltage range as 4VDC to 32VDC. SPST-NO contacts with rated current 20A and output voltage 4VDC to 32VDC Solid-state circuitry involves no moving parts and is alternative to standard electromechanical relays. Advantages include longer life cycles, less energy consumption, and reduced maintenance costs. Optically coupled circuit provides isolation between input and output circuits. Internal snubber helps protect the relays internal circuit from high voltage transients. Internal heat sink provides factory tested thermal management. Finger protected terminals help prevent an operator from touching live circuits. Mounts directly onto a DIN rail or panel, and provides flexibility to accommodate last-minute design changes.