The 90-380S1 is a heavy-duty, enclosed general-purpose relay intended for heating, cooling, and general switching applications. It operates on a 24V AC coil at 50/60 Hz and features a SPNO/SPNC (Single Pole Normally Open/Single Pole Normally Closed) contact configuration. The relay supports an inductive contact rating of 12 Amps continuous at 125 VAC and a resistive rating of 18 Amps continuous at 277 VAC. Built for durability, it is rated for a mechanical life of 1,000,000 operations and an electrical life of 100,000 operations. The totally enclosed design, Class B coil insulation, and wide operating temperature range of -40°F to 150°F ensure reliable and quiet performance in various environments.