Square D QMB365MW - Fusible Safety Switch 400A@600V (200kA AIC, NEMA KS1)

Square D QMB365MW is a fusible safety switch designed for industrial power distribution systems requiring high-current protection. This 600V-rated switch handles 400A loads across 3 poles with a 200kA interrupting capacity at 480V, housed in a compact NEMA 1 enclosure measuring 58.4mm (D) x 47.1mm (W) x 35.3mm (H). Certified to NEMA KS1 standards, its R-class fuse compatibility and HHED frame design make it suitable for three-phase motor control centers and heavy equipment panels.

Key Features & Specifications

• Type: Fusible safety switch, panel mount
• Voltage Rating: 600V AC
• Current Rating: 400A
• Dimensions: 58.4 x 47.1 x 35.3 mm (2.30 x 1.85 x 1.39 in)
• Standards: NEMA KS1, NEMA 1 enclosure
• Applications: Three-phase industrial power distribution
• Switch Style: Fusible
• Configuration: Single
• Poles: 3
• AIC rating: 200kA@480V
• Phase: 3
• Fuse Class: R
• Compatible Frames: HHED
• Weight: 50.8 lb
• Country of Origin: United States

Product Identification

• UPC: 785901766957
• GTIN: 00785901766957