The PR4-5V-450-1A is an SPST power relay designed for switching electrical loads. It operates with a nominal 5 Vdc coil, consuming 450 mW of power, and has a coil resistance of 55.6 Ω. The silver alloy contacts are rated for 5 A at 250 Vac or 30 Vdc, with a maximum switching power of 150 W. This relay offers high reliability with a minimum electrical life of 100,000 operations and a dielectric strength of 4,000 Vac between the coil and contacts. Its wide operating temperature range of -40 to 85°C and UL/cUL safety approvals make it suitable for various industrial control and power management applications.