Square D QMB3640MJ - Fusible Safety Switch 400A@600V (200kA AIC, NEMA 1)

Square D QMB3640MJ is a panel-mounted fusible safety switch designed for industrial power distribution protection. This 600V AC-rated switch handles 400A continuous current with a 200kA interrupting capacity at 480V, featuring a rugged NEMA 1 enclosure and three-pole single-configuration design. The QMB Saflex family unit weighs 65 lb and complies with Class J fuse standards for reliable circuit protection. Its ED frame compatibility makes it suitable for demanding applications including motor control centers, industrial machinery, and high-capacity electrical distribution systems.

Key Features & Specifications

• Type: QMB Saflex fusible safety switch, panel mount
• Voltage Rating: 600V AC
• Current Rating: 400A
• Dimensions: NEMA 1 enclosure
• Standards: Class J fuse compliant
• Applications: Industrial power distribution, motor control centers
• Switch Type: Fusible
• Configuration: Single
• Poles: 3
• Phase: 3
• AIC rating: 200kA@480V
• Compatible Frames: ED
• Weight: 65 lb