Also known as Latching solenoids, they use permanent magnet for making the magnet circuit. they use holding power of permanent magnet attraction to hold position, which results in energy saving & get released by supplying a reverse polarity pulse.
Bicron C-Frame DC solenoids are “open” frame coil configurations for linear motion. These are known to be the simplest and most cost-effective design for solenoids. They are a proven low-cost, high-performance solution.
Laminated Solenoids allow for extremely short closing times and very high initial attracting forces. These solenoids are manufactured by using specialist techniques that use many thin sheets or laminations, that are individually insulated and assembled to form a ‘stack’ for the housing and yoke.