Square D QMB3640M - Fusible Safety Switch 400A@600V (200kA AIC, 3-Pole)

Square D QMB3640M is a fusible safety switch designed for industrial power distribution systems requiring high fault current protection. This 600V AC-rated switch handles 400A continuous current with a 200kA interrupting capacity at 480V, featuring a rugged NEMA 1 enclosure for indoor use. The three-pole single-configuration unit weighs 65 lb and integrates Class R fuses for enhanced short-circuit protection. Compliant with industrial safety standards, it's engineered for compatibility with HHED frames in three-phase applications where reliable circuit isolation is critical.

Key Features & Specifications

• Type: QMB Saflex fusible safety switch, panel mount
• Voltage Rating: 600V AC
• Current Rating: 400A
• Configuration: Single
• Poles: 3
• Phase: 3
• Fuse Class: R
• AIC Rating: 200kA@480V
• NEMA Rating: 1
• Switch Style: Fusible
• Compatible Frames: HHED
• Weight: 65 lb