Square D QMB3640MJB - Fusible Safety Switch 400A 600V (200kA AIC @480V)

Square D QMB3640MJB 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 across 3 poles with a 200kA interrupting capacity at 480V, housed in a NEMA 1 enclosure weighing 65 lb. Its rugged panel-mount construction features J-class fuse compatibility and ED frame integration for robust circuit protection. Compliant with industrial safety standards, this QMB Saflex family switch is engineered for heavy-duty applications including motor control centers, manufacturing plants, and commercial power distribution panels.

Key Features & Specifications

• Type: Fusible safety switch, panel mount, QMB Saflex family
• Voltage Rating: 600V AC
• Current Rating: 400A
• Dimensions: NEMA 1 enclosure (specific dimensions not provided)
• Standards: Industrial safety compliance (specific standards not provided)
• Applications: Motor control centers, industrial power distribution
• Switch Type: Fusible
• Configuration: Single
• Poles: 3
• Phase: 3
• AIC rating: 200kA@480V
• Fuse Class: J
• Weight: 65 lb
• Compatible Frames: ED
• Nema Rating: 1