[Mitsubishi Electric] - B-N20FN Class 2 Heat Resistant Main Circuit NC Magnetic Contactor (AC Operated, 17.5A Carrying, 2a Aux)

Mitsubishi Electric MS-T/N series B-N20FN class 2 heat-resistant magnetic contactor with normally closed b-contact main circuit, for emergency power distribution boards and panelboards where source changeover or dynamic braking duty is required. Retains conduction and insulation function at high temperature during a fire, switching and carrying the heat-resistant rated current for 30 minutes under the one seventh fire temperature curve. Heat-resistant carrying current 17.5A, heat-resistant rated current 17.5A at 220V under AC-1 class, 8A (15A) at DC110V, 1A (5A) at DC220V under DC2 and DC4 class in two-pole series connection. Main contact configuration 1a2b standard and 3b optional, 2a twin auxiliary contacts. AC operated coil, durability and outline dimensions the same as the standard product. Type approval number 2MC-96134. Certified by the Japan Electrical Manufacturers Association of Distribution Control Systems to Fire and Disaster Management Agency Notification No.10 of 1981. Coils cannot be replaced by the user because the product is a certified item. For emergency power circuits keep the load current within the heat-resistant rated current and select wire sized for at least the load current divided by 0.7 at normal temperature.