Eaton main fusible switch, 400A, Copper, NEMA 3R, Underground, Class T, 100 kAIC, Four-wire, Three-phase, Barrier kits: 400A-800A fusible switches: Bottom feed-3MFSBBK, Top feed-3MFSTB, 120/208V, (2) #1/0 AWG-300 kcmil, (1) 750 kcmil

Eaton main fusible switch 400A Copper NEMA 3R - Electrical Distributor Switchgear Solutions This Eaton main fusible switch is designed for heavy-duty electrical distribution and protection in commercial and industrial applications. Rated at 400 amperes with copper bus material, it supports four-wire, three-phase underground installations. The NEMA 3R enclosure ensures weather resistance suitable for outdoor or wet locations. This switch is compatible with Class T fuses and rated for 100 kAIC interrupting capacity, providing reliable circuit protection. It features bottom feed capability and barrier kits for 400A-800A fusible switches, accommodating wire sizes from (2) #1/0 AWG to 300 kcmil and (1) 750 kcmil, suitable for 120/208V systems. Eaton's robust design supports electrical distributors and switchgear suppliers seeking durable and safe power management solutions. Specifications Manufacturer: Eaton Manufacturer Part #: 3MFS400RBC Amperage: 400 amperes Bus Material: Copper Enclosure: NEMA 3R Feed Type: Bottom Number of Phases: 3 Dimensions (HxWxD): 47.7 in x 16.64 in x 22.54 in Interrupting Rating: 100 kAIC Voltage: 120/208V Wire Size Range: (2) #1/0 AWG - 300 kcmil, (1) 750 kcmil Weight: 74 lbs Features Fusible switch with Class T fuse compatibility Bottom feed design for flexible installation Four-wire, three-phase configuration for commercial power distribution Corrosion-resistant NEMA 3R enclosure for outdoor and underground applications Includes barrier kits for enhanced safety and ease of wiring Robust copper bus for superior conductivity and durability Supports wire sizes up to 750 kcmil for high-capacity connections Downloads & Links Eatons Volume 1-Residential And Light Commercial Dimensional Drawing - Multiple Metering Main Fusible Switch Bottom Feed