[Mitsubishi Electric] - S-T21FN Class 2 Heat Resistant Magnetic Contactor (AC Operated, 22.4A Carrying, 20A AC-3 at 220V)

Mitsubishi Electric MS-T/N series S-T21FN class 2 heat-resistant magnetic contactor for distribution boards and panelboards of dedicated emergency power receiving equipment. Retains conduction and insulation function at high temperature during a fire so that power to fire fighting equipment continues, switching and carrying the heat-resistant rated current for 30 minutes under the one seventh fire temperature curve. Heat-resistant carrying current 22.4A, heat-resistant rated current 20A at 220V, 20A at 440V, 17A at 550V under AC-3 class and 22.4A at 220V, 22.4A at 440V under AC-1 class, 3a main contacts. AC operated coil, durability and outline dimensions the same as the standard product. Reversing type S-2XT21FN is available. Type approval number 2MC-13170. 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.