Square D QMJ366W - Fusible Safety Switch 600A 600V (200kA AIC @480V)

Square D QMJ366W is a fusible safety switch designed for industrial power distribution systems requiring high fault current protection. This 600V AC, 600A rated switch features a rugged NEMA 1 enclosure with three poles in a single configuration, compatible with ED frames for seamless panel integration. Constructed with Class J fuses, it delivers 200kA interrupting capacity at 480V for reliable short-circuit protection in demanding environments. UL-listed and compliant with industrial safety standards, this switch is engineered for three-phase applications including motor control centers, manufacturing plants, and heavy machinery power distribution.

Key Features & Specifications

• Type: Fusible safety switch with Class J fuse protection
• Voltage Rating: 600V AC
• Current Rating: 600A
• Configuration: Single
• Poles: 3
• Phase: 3
• AIC rating: 200kA@480V
• Fuse Class: J
• Nema Rating: 1
• Switch Style: Fusible
• Compatible Frames: ED
• Weight: 30 lb
• Standards: UL listed, industrial safety compliant
• Applications: Motor control centers, industrial power distribution, manufacturing plants