Performance Advantage •Contact connection and coil connection both no polar requirements; •This series can be operated in explosive and harmful environment as Epoxy sealed Epoxy resin sealed structure and coil & contact will not oxidation and pollution; •Efficient coil: Built-in energy saving coil, Holding power only 1.7~2.0W. Reverse electromotive force is 0V, No coil electromagnetic counter force; • Compliance with the RoHS requirements and more beneficial to human health and environmental protection; •Small size, light weight, Easy installation; •The contacts are sealed in a epoxy sealed cavity and filled with gas with high cooling arc capability.