This heavy-duty SPST relay harness is engineered for reliable performance in demanding automotive, marine, and industrial applications. Operating at 12VDC with a robust 40A rating, it features color-coded wires for foolproof installation and maintenance. The compact design incorporates premium silver alloy contacts that deliver exceptional switching reliability and durability through 100,000 electrical operations. With an impressive operating temperature range of -55°F to 158°F, this relay performs consistently in extreme conditions. The unit boasts low power consumption with just 1.8W coil power while maintaining high sensitivity and quick response times - 15ms operate and 10ms release times. Its sealed construction and high insulation resistance of 100MΩ at 500VDC ensure dependable operation in challenging environments. Perfect for powering auxiliary lights, fans, horns, and other high-current automotive accessories, this relay includes built-in protection features and meets rigorous performance standards. The harness socket design allows for clean, professional installations while the mounting bracket enables secure positioning in any orientation.