Omron STI offers the D4NS series of safety door switches that conforms to European environmental restrictions in the RoHS directive. Standardized gold-clad contacts provide high contact reliability and can be used with both standard loads and microloads. M12-connector models are available, saving on labor and simplifying replacement. The lineup includes three-contact models with 2NC/1NO and 3NC contact forms and MBB models in addition to the previous 1NC/1NO and 2NC contact forms.