Guardian Electric DC frame solenoids are designed for a wide range of industrial applications requiring reliable and efficient actuation. Available in both continuous-duty (energized indefinitely) and intermittent-duty (energized for a maximum of 180 seconds) cycles, these solenoids provide versatility for different operational needs. The middle letter of the manufacturer's type indicates the duty cycle. These solenoids are shipped without return springs, allowing for customized integration into various systems.